#### Education

PhD

#### Biography

Prof.Anirban Pathak (FNASc, FIETE) is a theoretical physicist. He did his Ph.D. from VisvaBharati, Santiniketan, India. Subsequently, he was a post-doctoral fellow in the Freie University, Berlin. He joined JIIT, Noida in 2002. At present he is actively involved in teaching and research related to several aspects of quantum optics and quantum information with a focus on quantum cryptography. He is a fellow of The National Academy of Sciences, India (NASI), Institute of Electronics and Telecommunication Engineering (IETE) and Optical Society of India (OSI). He is a visiting scientist at Palacky University, Czech Republic. He is also a member of Editorial Board of Quantum Information Processing, Springer-Nature. He guided 6 PhD students and a number of Post-Doctoral Fellows. At present he leads a research group focused on quantum optics and quantum information with specific interest on quantum cryptography. He has also completed several DST and DRDO funded projects and at present he has ongoing projects funded by DST and DRDO. He has active research collaboration with different research groups in India and abroad. He is a recipient of2017 Shri O. P. BhasinAward in the field of Electronics and Information Technology.

**Detail of Research project:**

Project Title: Designing of Devices and Protocols for Quantum Hacking, Random Number Generation and Secure Communication.

Project cost: Rs. 222.16 Lac (Approx. 190.00 L will be used at JIIT)

Granting Agency: DST, India

Status: Ongoing (in collaboration with PPISR, Bangalore)

Project Title: Generation of Entangled Photons and its Applications to Quantum Computation and Information Processing.

Project cost: Rs. 207.92 Lac (Approx. 40.0 L will be used at JIIT)

Granting Agency: DST, India

Status: Ongoing (in collaboration with IIT Jodhpur)

Project Title: **:** Design & Analysis of the Quantum Cryptographic Schemes that can be Implemented in the Metropolitan cities using Optical Resources.

Project cost: Rs. 40.91 Lac

Granting Agency: DRDO, India

Status: Ongoing

Project Title: Design and cryptanalysis of protocols of secure quantum communication.

Project cost: Rs. 34.6 Lac

Granting Agency: DRDO, India

Status: Completed

Project Title: Entangled and other nonclassical states and their applications in the field of quantum computation and communication

Project cost: Rs. 39.5 Lac

Granting Agency: DST, India

Status: Completed

Project Title: “Theoretical studies of higher order non-classicality and its applications”

Project cost: Rs. 12.75 Lac

Granting Agency: DST, India

Status: Completed

Project Title: “Theoretical study of single photon sources for quantum computation”

Project cost: Rs. 2.16 Lac

Granting Agency: DST, India

Status: completed

#### Publications

**Books:**

- MeghnadSaha: A great scientist and a visionary,
**A. Pathak**and A. Ghatak (Eds.), Viva Books, New Delhi, India (2019) ISBN 978-93-89401-71-4. - Lecture on Quantum Mechanics: Fundamentals and Applications,
**A. Pathak**and A. Ghatak (Eds.), Viva Books, New Delhi, India (2019) ISBN 978-81-309-2995-8 - Optical quantum information and quantum communication,
**A. Pathak**and A. Banerjee, SPIE Spotlight Series, SPIE Press (2016) ISBN: 9781510602212. - Light and its Many Wonders, A. Ghatak,
**A. Pathak**and V. P. Sharma (Eds.), Viva Books, New Delhi, India (2015) ISBN 978-81-309-3428-0. - Elements of Quantum Computation and Quantum Communication,
**A. Pathak**, CRC Press, Boca Raton, USA (2013) ISBN-10: 1466517913**;**ISBN-13: 978-1466517912.

**Chapter(s) in a book (Refereed publication)**

- MeghnadSaha: A Physicist’s Approach to Social Problems,
**A. Pathak**in MeghnadSaha: A great scientist and a visionary, A. Pathak and A. Ghatak (Eds.), Viva Books, New Delhi, India (2019) ISBN 978-93-89401-71-4. (Chapter 5). - Experimental Quantum Mechanics in the Classroom: Testing Basic Ideas of Quantum Mechanics and Quantum Computing Using IBM Quantum Computer,
**A. Pathak**in Lecture on Quantum Mechanics: Fundamentals and Applications. A. Pathak and A. Ghatak (Eds.), Viva Books, New Delhi, India (2019) ISBN 978-81-309-2995-8, 41-66 (Chapter 3) - Simple Interesting Experiments with Photons, A. Ghatak and
**A. Pathak**in Light and its Many Wonders, A. Ghatak, A. Pathak and V. P. Sharma (Eds.), Viva Books, New Delhi, India (2015); ISBN 978-81-309-3428-0; 119-137 (Chapter 8). - Optical Communication: Flaming Torch to Quantum Communication with Single Photons, A, Pathak in Light and its Many Wonders, A. Ghatak,
**A. Pathak**and V. P. Sharma (Eds.), Viva Books, New Delhi, India (2015); ISBN 978-81-309-3428-0; 309-324 (Chapter 19). - Minimal Designs of Reversible Sequential Elements, A. Banerjee,
**A. Pathak**, and G. W. Dueck. In Reversible Computation, Eds.S. Yamashita and S.-i. Minato, Lect. Notes in Computer Science, Springer International Publishing,**8507**(2014) 137-148. - Probabilistic Model of Fault Detection in Quantum Circuits, A Banerjee and
**A Pathak**, Lect. Notes in Phys., Springer International Publishing,**802**(2010) 297–304 (Chapter 15).

**Papers in International Journal****:**

- Thapliyal,K.,and
**Pathak,A**.(2019).Are optical quantum information processing experiments possible without beamsplitter?.*Asian J. Phys*.**28**761-774. - Malpani,P.,Thapliyal, K.,Alam,
**A.,Pathak,A**.,Narayanan,V.,and Banerjee, S (2019).Quantum phase properties of photon added and subtracted displaced Fock states.*Ann. Der Physik***531**1900141, - Aravinda, S.,
**Pathak,A**., and Srikanth,R.(2019).Hierarchical axioms for quantum mechanics.*Euro. Phys. J.*D**73**207. - Mishra,S.,Thapliyal,K.,
**Pathak,A**., and Venugopalan,A.(2019).Comparing coherence measures for X states: Can quantum states be ordered based on quantum coherence?*Quant. Infor. Process*.**18**295. - Naikoo, J., Banerjee,S., and
**Pathak,A**.(2019).Interplay between nonclassicality and PT symmetry in an effective two level system with open system effects.*Phys. Rev*. A**100**023836. - Mukherjee,A., Sen,B.,Thapliyal, K,Mandal,S., and
**Pathak,A.**(2019).QuantInteraction of light and semiconductor can generate quantum states required for solid state quantum computing: Entangled, steered and other nonclassical states.*Quant.Infor. Process.***18**234 - Alam,N.,Thapliyal,K.,
**Pathak,A**., Sen,B., Verma,A., and Mandal,S.(2019).Bose-condensed optomechanical-like system and a Fabry-Perot cavity with one movable mirror: Quantum correlations from the perspectives of quantum optics.*Euro. Phys. J.*D**73**139. - Thapliyal,K., and
**Pathak,A**.(2019). Quantum e-commerce: A comparative study of possible protocols for online shopping and other tasks related to e-commerce*.Quant. Infor. Process.***18**191. - Mandal, K., Alam,N., Verma, A.,
**PathaA.,**and Banerjee, J. (2019).Generalized binomial state: Nonclassical features observed through various witnesses and a quantifier of nonclassicality,*Optics Communication***445**193-203 - Thapliyal, K.,
**Pathak**,**A.,**Sen, B., and Perina, J. (2019). Nonclassicality in non-degenerate hyper-Raman processes,*Optics Communication***444**111-119. - Naikoo, J.,Thapliyal, K., Banerjee S., and
**Pathak**,**A.**(2019).Quantum Zeno effect and nonclassicality in a PT symmetric system of coupled cavities,*Phys. Rev. A***99**023820 - Malpani, P., Alam, N., Thapliyal, K.,
**Pathak**,**A.,**Narayanan, V., and Banerjee, S. (2019) Lower- and higher-order nonclassical properties of photon added and subtracted displaced Fock states,*Ann. Der Physik***531**1800318 - Thapliyal, K., Sharma, R. D.,and
**Pathak**,**A.**(2018). Orthogonal-state-based and semi-quantum protocols for quantum private comparison in noisy environment.*International Journal of Quantum Information***16**1850047. - Alam, N., Mandal, K., and
**Pathak**,**A.**(2018). Higher-order nonclassical properties of a shifted symmetric cat state and a one-dimensional continuous superposition of coherent states. International Journal of Theoretical Physics,**57**3443-3456. - Thapliyal, K., and
**Pathak**,**A.**(2018). Kak's three-stage protocol of secure quantum communication revisited: Hitherto unknown strengths and weaknesses of the protocol.*Quantum Information Processing*,**17**229. - Naikoo, J., Banerjee, S., Thapliyal, K., and
**Pathak**,**A.**(2018). Probing nonclassicality in an optically-driven cavity with two atomic ensembles. Physical Review A**97**063840. - Banerjee, A., Thapliyal, K., and
**Pathak**,**A.**(2018).Quantum Conference.*Quantum Information Processing*,**17**161. - Alam, N., Verma, A., and
**Pathak**,**A.**(2018). Higher order nonclassicalities of finite dimensional coherent states: A comparative study. Physics Letters A 3821842-1851 - Sosodia, M., and
**Pathak**,**A.**(2018). Comment on “Quantum Teleportation of Eight-Qubit State via Six-Qubit Cluster State”, International Journal of Theoretical Physics**, 57**516-522. - Das, M., Sen, B., Ray, A., &
**Pathak, A.**(2018). Lower order and higher order entanglement in four-wave mixing process. Annalen der Physik 530, 1700160. **Pathak, A.,**& Ghatak, A. (2018). Classical light vs. nonclassical light: Characterizations and interesting applications.*Journal of Electromagnetic Waves and Applications 32,*229-264.- Sisodia, M., Shukla, A., Thapliyal, K., &
**Pathak, A.**(2017). Design and experimental realization of an optimal scheme for teleportation of an n-qubit quantum state.*Quantum Information Processing 16,*292. - Sisodia, M., Shukla, A., &
**Pathak, A.**(2017). Experimental realization of nondestructive discrimination of Bell states using a five-qubit quantum computer.*Physics Letters A**381*, 3860-3874. - Aravinda, S., Srikanth, R., &
**Pathak, A.**(2017). On the origin of nonclassicality in single systems.*Journal of Physics A 50*, 465303. - Shukla, C., Thapliyal, K., &
**Pathak, A.**(2017). Semi-quantum communication: Protocols for key agreement, controlled secure direct communication and dialogue.*Quantum Information Processing 16,*295. - Thapliyal, K., Samantray, N. L., Banerji, J., &
**Pathak, A.**(2017). Comparison of lower- and higher-order nonclassicality in photon added and subtracted squeezed coherent states.*Physics Letters A 381*, 3178-3187. - Shukla, C., Thapliyal, K., &
**Pathak, A.**(2017). Hierarchical Joint Remote State Preparation in Noisy Environment.*Quantum Information Processing 16,*205. - Shenoy, A. H.,
**Pathak**,**A.,**&Srikanth, R. (2017). Quantum cryptography: key distribution and beyond.*Quanta 6,*1-47. - Sharma, R. D., Thapliyal, K., &
**Pathak, A.**(2017). Quantum sealed-bid auction using a modified scheme for multiparty circular quantum key agreement.*Quantum Information Processing 16,*169. - Thapliyal, K.,
**Pathak, A.**, & Banerjee, S. (2017). Quantum cryptography over non-Markovian channels.*Quantum Information Processing*,*16*(2), 115. - Rana, M., Singla, N.,
**Pathak, A.**, Dhanya, R., Narayana, C., & Chowdhury, P. (2017). Vibrational-electronic properties of intra/inter molecular hydrogen bonded heterocyclic dimer: An experimental and theoretical study of pyrrole-2-carboxaldehyde.*Vibrational Spectroscopy 89,*16–25 - Sisodia, M., Verma, V., Thapliyal, K., &
**Pathak, A.**(2017). Teleportation of a qubit using entangled non-orthogonal states: A comparative study.*Quantum Information Processing*,*16*(2), 76. - Thapliyal, K., Sharma, R. D., &
**Pathak, A.**(2017). Protocols for quantum binary voting.*International Journal of Quantum Information*, 1750007. - Banerjee, A., Shukla, C., Thapliyal, K.,
**Pathak, A.**, &Panigrahi, P. K. (2017). Asymmetric quantum dialogue in noisy environment.*Quantum Information Processing*,*16*(2), 49. -
Shukla, A., Pandey, A. K., &
**Pathak, A.**(2017). Benford's distribution in extrasolar world: Do the exoplanets follow Benford's distribution?*Journal of Astrophysics and Astronomy 38*, 7. - Giri, S. K., Thapliyal, K., Sen, B., &
**Pathak, A.**(2017). Higher-order nonclassical properties of atom-molecule Bose-Einstein Condensate.*Physica A*466,140-152. - Sharma, V., Thapliyal, K.,
**Pathak, A.**, & Banerjee, S. (2016). A comparative study of protocols for secure quantum communication under noisy environment: single-qubit-based protocols versus entangled-state-based protocols.*Quantum Information Processing*,*15*(11), 4681-4710. - Shukla, C., Banerjee, A.,
**Pathak, A.**, & Srikanth, R. (2016). Secure quantum communication with orthogonal states.*International Journal of Quantum Information*,*14*(06), 1640021. - Thapliyal, K.,
**Pathak, A.**, &Peřina, J. (2016). Linear and nonlinear quantum Zeno and anti-Zeno effects in a nonlinear optical coupler.*Physical Review A*,*93*(2), 022107. - Thapliyal, K., Banerjee, S., &
**Pathak, A.**(2016). Tomograms for open quantum systems: in (finite) dimensional optical and spin systems.*Annals of Physics*,*366*, 148-167. - Giri, S. K., Sen, B.,
**Pathak, A.**, & Jana, P. C. (2016). Higher-order two-mode and multimode entanglement in Raman processes.*Physical Review A*,*93*(1), 012340. - Sharma, R. D., Thapliyal, K.,
**Pathak, A.**, Pan, A. K., & De, A. (2016). Which verification qubits perform best for secure communication in noisy channel?*Quantum Information Processing*,*15*(4), 1703-1718. - Banerjee, A., Shukla, C., &
**Pathak, A.**(2015). Maximal entanglement concentration for (n+ 1)-qubit states.*Quantum Information Processing*,*15*(4), 4523-4536. - Thapliyal, K., Verma, A., &
**Pathak, A.**(2015). A general method for selecting quantum channel for bidirectional controlled state teleportation and other schemes of controlled quantum communication.*Quantum Information Processing*,*14*(12), 4601-4614. - Thapliyal, K., Banerjee, S.,
**Pathak, A.**, Omkar, S., &Ravishankar, V. (2015). Quasiprobability distributions in open quantum systems: spin-qubit systems.*Annals of Physics*,*362*, 261-286. - Sharma, V., Shukla, C., Banerjee, S., &
**Pathak, A.**(2015). Controlled bidirectional remote state preparation in noisy environment: a generalized view.*Quantum Information Processing*,*14*(9), 3441-3464. - Singla, N., Tripathi, A., Rana, M., Goswami, S. K., Pathak A., Chowdhury, P., (2015). Turn on/off ESIPT based fluorescent chemosensor for selective detection of environmentally hazardous metal ions (Zn
^{2+}, Pb^{2+}) in aqueous media.*J Luminescence*, 165, 46-55. - Thapliyal, K., &
**Pathak, A.**(2015). Applications of quantum cryptographic switch: various tasks related to controlled quantum communication can be performed using Bell states and permutation of particles.*Quantum Information Processing*,*14*(7), 2599-2616. - Miranowicz, A., Bartkiewicz, K.,
**Pathak, A.**, Peřina Jr, J., Chen, Y. N., & Nori, F. (2015). Statistical mixtures of states can be more quantum than their superpositions: Comparison of nonclassicality measures for single-qubit states.*Physical Review A*,*91*(4), 042309. **Pathak, A.**(2015). Efficient protocols for unidirectional and bidirectional controlled deterministic secure quantum communication: different alternative approaches.*Quantum Information Processing*,*14*(6), 2195-2210.- Shukla, C., Banerjee, A., &
**Pathak, A.**(2015). Protocols and quantum circuits for implementing entanglement concentration in cat state, GHZ-like state and nine families of 4-qubit entangled states.*Quantum Information Processing*,*14*(6), 2077-2099. - Mishra, S., Shukla, C.,
**Pathak, A.**, Srikanth, R., &Venugopalan, A. (2015). An integrated hierarchical dynamic quantum secret sharing protocol.*International Journal of Theoretical Physics*,*54*(9), 3143-3154. - Aravinda, S., Banerjee, A.,
**Pathak, A.**, Srikanth, R., (2014).Orthogonal-state-based cryptography in quantum mechanics and local post-quantum theories,*Int. J. Quant. Info.*12, 1560020 - Thapliyal, K.,
**Pathak, A.**, Sen, B., &Per̆ina, J. (2014). Nonclassical properties of a contradirectional nonlinear optical coupler.*Physics Letters A*,*378*(46), 3431-3440. - Yadav, P., Srikanth, R., &
**Pathak, A.**(2014). Two-step orthogonal-state-based protocol of quantum secure direct communication with the help of order-rearrangement technique.*Quantum information processing*,*13*(12), 2731-2743. - Hamar, M., Michálek, V., &
**Pathak, A.**(2014). Non-classical Signature of Parametric Fluorescence and its Application in Metrology.*Measurement Science Review*,*14*(4), 227-236. - Thapliyal, K.,
**Pathak, A.**, Sen, B., &Peřina, J. (2014). Higher-order nonclassicalities in a codirectional nonlinear optical coupler: Quantum entanglement, squeezing, and antibunching.*Physical Review A*,*90*(1), 013808. - Shukla, C., Alam, N., &
**Pathak, A.**(2014). Protocols of quantum key agreement solely using Bell states and Bell measurement.*Quantum information processing*,*13*(11), 2391-2405. - Shukla, C.,
**Pathak, A.**(2014). Orthogonal-state-based secure direct quantum communication without actual transmission of the message qubits.*Quantum information processing*13, 2099-2113 - Pintr, P., Peřinová, V., Lukš, A., &
**Pathak, A.**(2014). Relative stellar occurrence of exoplanets in habitable zones of the main sequence F, G, K stars.*Planetary and Space Science*,*99*, 1-6. - Miranowicz, A., Paprzycka, M.,
**Pathak, A.**, & Nori, F. (2014). Phase-space interference of states optically truncated by quantum scissors: Generation of distinct superpositions of qudit coherent states by displacement of vacuum.*Physical Review A*,*89*(3), 033812. - Giri, S. K., Sen, B., Ooi, C. R., &
**Pathak, A.**(2014). Single-mode and intermodal higher-order nonclassicalities in two-mode Bose-Einstein condensates.*Physical Review A*,*89*(3), 033628. **Pathak, A.**, & Banerji, J. (2014). Wigner distribution, nonclassicality and decoherence of generalized and reciprocal binomial states.*Physics Letters A*,*378*(3), 117-123.- Srinatha, N., Omkar, S., Srikanth, R., Banerjee, S., &
**Pathak, A.**(2014). The quantum cryptographic switch.*Quantum information processing*, 1-12. **Pathak, A.**, Kr̆epelka, J., &Peřina, J. (2013). Nonclassicality in Raman scattering: Quantum entanglement, squeezing of vacuum fluctuations, sub-shot noise and joint photon–phonon number and integrated-intensity distributions.*Physics Letters A*,*377*(38), 2692-2701.- Shukla, C., Banerjee, A., &
**Pathak, A.**(2013). Bidirectional controlled teleportation by using 5-qubit states: a generalized view.*International Journal of Theoretical Physics*,*52*(10), 3790-3796. - Shukla, C., &
**Pathak, A.**(2013). Hierarchical quantum communication.*Physics Letters A*,*377*(19), 1337-1344. - Sen, B., Giri, S. K., Mandal, S., Ooi, C. R., &
**Pathak, A.**(2013). Intermodal entanglement in Raman processes.*Physical Review A*,*87*(2), 022325. - Singla, N., Kumar, R.,
**Pathak, A.**, & Chowdhury, P. (2013). Excited state behavior of Pyrrole 2-carboxyldehyde: Theoretical and experimental study.*SpectrochimicaActa Part A: Molecular and Biomolecular Spectroscopy*,*112*, 125-131. - Shukla, C., Banerjee, A., &
**Pathak, A.**(2013). Improved protocols of secure quantum communication using W states.*International Journal of Theoretical Physics*,*52*(6), 1914-1924. - Pintr, P., Peřinová, V., Lukš, A., &
**Pathak, A.**(2013). Statistical and regression analyses of detected extrasolar systems.*Planetary and Space Science*,*75*, 37-45. - Shukla, C., Kothari, V., Banerjee, A., &
**Pathak, A.**(2013). On the group-theoretic structure of a class of quantum dialogue protocols.*Physics Letters A*,*377*(7), 518-527. - Shukla, C.,
**Pathak, A.**, & Srikanth, R. (2012). Beyond the Goldenberg–Vaidman protocol: secure and efficient quantum communication using arbitrary, orthogonal, multi-particle quantum states.*International Journal of Quantum Information*,*10*(08), 1241009. - Banerjee, A., &
**Pathak, A.**(2012). Maximally efficient protocols for direct secure quantum communication.*Physics Letters A*,*376*(45), 2944-2950. - Banerjee, A., &
**Pathak, A.**(2012). An algorithm for minimization of quantum cost.*Applied Mathematics and Information Science*6, 157-165. - Banerjee, A., Patel, K., &
**Pathak, A.**(2011). Comment on “quantum teleportation via GHZ-like state”.*International Journal of Theoretical Physics*,*50*(2), 507-510. **Pathak, A.**, & Banerjee, A. (2011). Efficient quantum circuits for perfect and controlled teleportation of n-qubit non-maximally entangled states of generalized Bell-type.*International Journal of Quantum Information*,*9*(supp01), 389-403.**Pathak, A.**, &Verma, A. (2010). Recent developments in the study of higher order nonclassical states.*Indian Journal of Physics*,*84*(8), 1005-1019.- Banerjee, A., &
**Pathak, A.**(2010). Optically implementable designs of reversible sequential devices.*Indian Journal of Physics*,*84*(8), 1063-1068. - Verma, A., &
**Pathak, A.**(2010). Generalized structure of higher order nonclassicality.*Physics Letters A*,*374*(8), 1009-1020. - Gupta, P., &
**Pathak, A.**(2010). Minimum total noise is a measure of higher order squeezing.*Optik-International Journal for Light and Electron Optics*,*121*(16), 1507-1510. - Sharma, N., and
**Pathak, A.**(2009). Bosonic channel capacity of nondispersive optical fiber.*Appl. Math.Inf. Sc.*3, 151. - Verma, A., &
**Pathak, A.**(2009). Reduction of quantum phase fluctuations in intermediate states.*Physics Letters A*,*373*(16), 1421-1428. - Verma, A., Sharma, N. K., &
**Pathak, A.**(2008). Higher order antibunching in intermediate states.*Physics Letters A*,*372*(34), 5542-5551. - Gupta, P., and
**Pathak, A.**(2007).Reduction of quantum phase fluctuations means antibunching.*Phys. Lett. A*365, 393. - Gupta, M.,
**Pathak, A.**, Srikanth, R., and Panigrahi, P. (2007). General Circuits for Distributing Measurement in Quantum Computation. Int. J. Quant. Info 5, 627 - Gupta, M., &
**Pathak, A.**(2007). A scheme for distributed quantum search through simultaneous state transfer mechanism.*Annalen der Physik*,*16*(12), 791-797. - Gupta, P., Pandey, P. N., &
**Pathak, A.**(2006). Higher order antibunching is not a rare phenomenon.*Journal of Physics B: Atomic, Molecular and Optical Physics*,*39*(5), 1137. **Pathak, A.**(2006). Generation of Higher Order Nonclassical States via AN Intense Electromagnetic Field.*International Journal of Modern Physics B*,*20*(11n13), 1421-1427.**Pathak, A.**(2006). A mathematical criterion for single photon sources used in quantum cryptography.*Ind. J. Phys.*80, 495.**Pathak, A.**, & Garcia, M. E. (2006). Control of higher order antibunching.*Applied Physics B*,*84*(3), 479-484.**Pathak, A.**, &Fernández, F. M. (2005). Is there any unique frequency operator for quantum-mechanical anharmonicoscillators.*Physics Letters A*,*341*(5), 390-400.**Pathak, A.**, & Mandal, S. (2003). Photon-Bunching, Photon-Antibunching and Nonclassical Photon Statistics of Coherent Light Coupled to a Cubic Nonlinear Medium.*Modern Physics Letters B*,*17*(05n06), 225-233.- Fernández, F. M., &
**Pathak, A.**(2003). Frequency operator for anharmonic oscillators by perturbation theory.*Journal of Physics A: Mathematical and General*,*36*(18), 5061. **Pathak, A.**(2003). Spatio-temporal history of decay.*Physics Letters A*,*314*(4), 255-260.**Pathak, A.**(2003) Interaction of coherent light with an (m-1)-th Order nonlinear medium.*Phys. Lett. A*317, 107.**Pathak, A.**, & Mandal, S. (2002). Classical and quantum oscillators of sextic and octicanharmonicities.*Physics Letters A*,*298*(4), 259-270.**Pathak, A.**, & Mandal, S. (2001). Classical and quantum oscillators of quartic anharmonicities: second-order solution.*Physics Letters A*,*286*(4), 261-276.**Pathak, A.**(2000). Generalized quantum anharmonic oscillator using an operator ordering approach.*Journal of Physics A: Mathematical and General*,*33*(31), 5607.**Pathak, A.**, & Mandal, S. (2000). Phase fluctuations of coherent light coupled to a nonlinear medium of inversion symmetry.*Physics Letters A*,*272*(5), 346-352.

**Papers presented in International/ National conferences**:

**Full papers:**

- Dueck, G. W.,
**Pathak**,**A.,**Rahman, M. M., Shukla, A., and Banerjee, A. (2018).Optimization of Circuits for IBM’s five-qubit Quantum Computers, Proceedings of 21st Euromicro Conference on Digital System Design. (DSD August 29-31, 2018, Prague, Czech Republic) 680-684, DOI: 10.1109/DSD.2018.00005 - Thapliyal, K., and
**Pathak, A.**(2015).Quantum Zeno and ant-Zeno effects in an asymmetric nonlinear optical coupler.*Proceedings of International Conference on Optics and Photonics (ICOP-2015)*, February 20-22, Kolkata, India (2015); Proc. of SPIE**9654**, 96541F1-F7. - Shukla, C., and
**Pathak, A.,**Different useful aspects of hierarchical quantum communication,*Proceedings of Asia Quantum Information Science-13*, August 25-30, Chennai, India (2013) p. 167-168. - Rahman, M., Banerjee,A.,Dueck, G. W.,and
**Pathak, A.**(2011).Two-qubit quantum gates to reduce the quantum cost of reversible circuit,*In 41st IEEE International Symposium on Multiple-Valued Logic (ISMVL-2011)*, May 23-25, Tusula, Finland, p. 86-92, DOI 10.1109/ISMVL.2011.56 - Banerjee, A., and
**Pathak, A.**(2010). Reversible multiplier circuit,*Third International Conference on Emerging Trends in Engineering and Technology, BITS Goa,*DOI 10.1109/ICETET.2010.70 *Verma, A., and***Pathak, A.**(2008)Which optical processes are suitable to make probabilistic SPS for quantum cryptography,*Optics and Photonics for Information Processing II**, San Diego, California, (August 2008) Paper no. 7072-48,*DOI:10.1117/12.793668.- Gupta, M.,
**Pathak, A.,**Srikanth, R., and Panigrahi,P. (2006).Circuits for distributing quantum measurement,*AIP Conference Proceedings*,**864,**197. **Pathak, A.,**(2001).AharonovAnandan phase for the quasi exactly solvable Bose Systems,*Proc. of Nat. Conf. on Laser and Its Application*, Dibrugarh 159.**Pathak, A.,**and Mandal, S. (1999)Enhanced and reduced phase fluctuations of coherent light coupled to a quantum quartic anharmonic oscillator,*Optics and Optoelectronics : Theory Devices and Application Vol I*, Eds: O. P. Nijhawan, A. K. Gupta, A. K. Musala and K. Singh, (Narosa, New Delhi) (1999) 188.

**Extended abstracts and short papers:**

- Alam, N., Thapliyal, K.,
**Pathak, A. (**2018).Squeezing in an optomechanical and an optomechanical-like systems, International conference on fiber optics and photonics. IIT Delhi, Delhi, India, December 12-15, (2018) **Pathak, A.,**Thapliyal, K. (2018).Quantum supremacy and optical couplers. International conference on fiber optics and photonics, IIT Delhi, Delhi, India, December 12-15, (2018)- Sisodia, M., Thapliyal, K., and
**Pathak, A.**(2018). Optical Designs for a set of quantum cryptographic protocols. Booklet of Student Conference on Optics and Photonics. October 4- 6, Physical Research Laboratory, Ahmedabad, India (2018) 47-48. - Malpani, P., Alam, N.,
**Pathak, A.**, Narayanan, V., and Banerjee, S. (2018). On the role of number state filtration on the nonclassical properties of displaced Fock state. Student Conference on Optics and Photonics (SCOP-2018), Physical Research Laboratory, India, 4-6 October, (2018). - Saxena, A., Shukla, A., Thapliyal, K., and
**Pathak, A.**(2018). Continuous variable secure multi-partyquantum computation. Student Conference on Optics and Photonics (SCOP-2018), Physical Research Laboratory, India, 4-6 October, (2018)69-70. - Alam, N., Mandal, K., Thapliyal, K., and
**Pathak**,**A.**(2018). Higher order nonclassicality: Where can we find it? Booklet of International conference on Quantum Frontiers and Fundamentals, April 30- May 4, Raman Research Institute Bangalore, India (2018) 108-110. - Sisodia, M., Shukla, A., and
**Pathak**,**A**. (2018). Our experience with the IBM quantum experience: The story of successful achievements and failures due to the limitations of the IBM quantum computers. Booklet of International conference on Quantum Frontiers and Fundamentals, April 30- May 4, Raman Research Institute Bangalore, India (2018) 99-102. - Aravinda, S., Srikanth, R., and
**Pathak, A.**(2018). Geometric construction of ontological models for single systems in the convex framework, Booklet of International conference on Quantum Frontiers and Fundamentals, April 30- May 4, Raman Research Institute Bangalore, India (2018) 51-52. - Thapliyal, K., and
**Pathak A.**(2018). Generation of nonclassical states in non-degenrate hyper-Raman processes,*Book of Abstracts of International Conference on Quantum and Nonlinear Optics (QNO 2018),*University of Malaya, Kuala Lumpur, Malaysia, February 2-5. - Thapliyal, K., and
**Pathak A.**(2018). Effect of noise on the dynamics of quantum systems and quantum communication schemes,*Book of Abstracts of International Conference on Quantum and Nonlinear Optics (QNO 2018),*University of Malaya, Kuala Lumpur, Malaysia, February 2-5. - Alam, N., Thapliyal, K., and
**Pathak A.**(2018). Nonclassical properties of a Fabry-Perot cavity with one movable mirror,*Book of Abstracts of International Conference on Quantum and Nonlinear Optics (QNO 2018),*University of Malaya, Kuala Lumpur, Malaysia, February 2-5. - Thapliyal, K., and
**Pathak A.**(2018). Dynamics of entanglement in various physical systems,*Book of Abstracts of International Symposium on New Frontiers in Quantum Correlations,*S. N. Bose National Centre for Basic Sciences, Kolkata, January 29-February 2. - Alam, N., Verma, A., and
**Pathak A.**(2018). Nonclassical properties of finite dimensional coherent states,*Book of Abstracts of International Symposium on New Frontiers in Quantum Correlations,*S. N. Bose National Centre for Basic Sciences, Kolkata, January 29-February 2. **Pathak A.**(2018). Quantum communication: The requirement, essential resources, new protocols and the effect of noise on them,*Book of Abstracts of International Symposium on New Frontiers in Quantum Correlations,*S. N. Bose National Centre for Basic Sciences, Kolkata, January 29-February 2.- Thapliyal, K., and
**Pathak A.**(2017). Nonclassicality in hyper-Raman processes,*Book of Abstract, Student Conference on Optics and Photonics (SCOP-2017),*PRL Ahmedabad, September 1-2, p. 23. - Thapliyal, K., and
**Pathak A.**(2017). Noise against noise,*Abstract Book,*Young Quantum-2017, HRI Allahabad, February 27-March 1. - Thapliyal, K., and
**Pathak A.**(2016). Quantum communication in Himalayan region: Prospects of open-air and fiber-based communication,*Book of Abstract of Research Papers in Physical Sciences,*86th Annual Session of the NASI, UCOST Dehradun, December 2-4, p. 4. - Sharma, R. D., Thapliyal, K., and
**Pathak A.**(2016). Quantum voting protocol based on controlled deterministic secure quantum communication,*Book of Abstract,*Student Conference on Optics and Photonics (SCOP-2016), PRL Ahmedabad, September 2-3. - Thapliyal, K., and
**Pathak A.**(2016). Nonclassical phenomena in non-linear optical couplers,*Book of Abstract,*Student Conference on Optics and Photonics (SCOP-2016), PRL Ahmedabad, September 2-3. **Pathak, A.**(2015). Nonclassicality: Some recent observations related to its quantitative measures,*Book of Abstracts of International Conference on Light Quanta: Modern Perspectives & Applications*, University of Allahabad, Allahabad, India, December 14-16, p. 6.- Mukhopadhyay, A., Sen, B., and
**Pathak, A.**(2015). Photon-exciton higher order intermodal entanglement,*Book of Abstracts of International Conference on Light Quanta: Modern Perspectives & Applications*, University of Allahabad, Allahabad, India, December 14-16, p. 19. **Pathak, A.**(2015). Nonclassicality in quantum and post-quantum theories: Its measures and origin,*Book of Abstracts of International Workshop and Conference on Quantum Foundations 2015*, NIT Patna, India, November 28- December 4, p. 18.- Banerjee, A.,
**Pathak, A.,**and Panigrahi, P. K. (2015). Asymmetric quantum dialogue,*Book of Abstracts of International Workshop and Conference on Quantum Foundations 2015*, NIT Patna, India, November 28- December 4, p. 29. - Aravinda S.,
**Pathak, A.,**and Srikanth, R. (2015). Secure communication in general probability theories,*Book of Abstracts of International Workshop and Conference on Quantum Foundations 2015*, NIT Patna, India, November 28- December 4, p. 37. - Shukla, C., Thapliyal, K., and
**Pathak, A.**(2015). Hierarchical quantum communication under noisy environment,*Book of Abstracts of International Workshop and Conference on Quantum Foundations 2015*, NIT Patna, India, November 28- December 4, p. 38. - Thapliyal, K., Verma, A., and
**Pathak, A.**(2015). A general structure of quantum channels for bidirectional controlled quantum communication schemes,*Book of Abstracts of International Workshop and Conference on Quantum Foundations 2015*, NIT Patna, India, November 28- December 4, p. 38. **Pathak, A.,**and Verm, A. (2015). Nonclassicality in truncated Hilbert space: A comparative study,*Book of Abstract of**International Conference on Optics and Photonics (ICOP-2015),*Kolkata, India, February 20-22, p. 88.- Giri, S. K., Sen, B.,
**Pathak, A.,**and Jana, P. C. (2014). Higher order entanglement in Raman processes.*Proceedings of the Conference on recent trends in information optics and quantum optics (ICQO-2014*), IIT Patna, India Nov 7-8, p. 55. **Pathak, A.**(2014). Nonclassicality: Some recent observations and open questions related to its quantitative measuers, applicability and necessity,*Proceedings of the Conference on recent trends in information optics and quantum optics (ICQO-2014)*, IIT Patna, India Nov 7-8 (2014), p. 26.**Pathak, A.,**Shukla, C., Arvinda, S., and Srikanth, R. (2014). Secure quantum communication using orthogonal states.*Book of abstract of**QUANTUM 2014**:**Advances in Foundations of Quantum Mechanics and Quantum Information with atoms and photons*, Turin Italy, May 25-30, p. 87.- Shukla, C., Alam N., and
**Pathak, A.**(2014) .Orthogonal-state-based protocols of quantum key agreementBook of abstract of QUANTUM 2014:*Advances in Foundations of Quantum Mechanics and Quantum Information with atoms and photons*, Turin Italy, May 25-30, p. 203. - Thapliyal, K.,
**Pathak, A.,**and Sen B.(2014).Higher order nonclassicalities in codirectional nonlinear optical coupler,*Proceeding of Int. Conf. Optics and Optoelectronics (ICOL) -2014*, Dehradun, 5-8 March p. 286. - Bhusan, S., Verma, A., and
**Pathak, A.**(2014) Higher-order nonclassicality in qudits,*Proceeding of Int. Conf. Optics and Optoelectronics (ICOL) -2014*, Dehradun, 5-8 March p. 294. - Manchanda. P., VermaA., and
**Pathak, A.**(2013). Phase Space Distribution Functions of Qudit States Using QUTIP,*International School on Quantum and Nano Computing Systems and Applications, QANSAS,*DEI Agra, Nov 27- Dec1. - Bhushan,
*,*S., Manchanda, P., Verma, A., and**Pathak,****A.**(2013). Agarwal Tara Nonclassicality in Qudits,*International School on Quantum and Nano Computing Systems and Applications.*QANSAS, DEI Agra, Nov 27- Dec1. - Yadav, P., Srikanth, R., and
**Pathak, A.**(2013). The role of duality and monogamy in quantum key distribution,*13*24-28 June, Nuremberg, Germany. Book of Abstract, p. 319.^{th}International Conference on Squeezed State and Uncertainty Relation (ICSSUR-13), - Shukla, C.,and
**Pathak, A.**(2013). Hierarchical quantum information splitting using 4-qubit entangled states*, International Conference on Quantum Information and Quantum Computing (ICQIQC 2013)*, IISc, Bangalore, poster no. 50, January 7-11. - Banerjee, A., Shukla
**,**C.,**Pathak, A.,**and Srikanth, R. (2013).Recent observationson secure direct quantum communication: Maximally efficient protocols with minimal resources,*International Conference on Quantum Information and Quantum Computing (ICQIQC 2013)*, IISc, Bangalore, poster no. 3, January 7-11. **Pathak, A.,**Shukla,C., and Srikanth, R. (2012). How can we construct and classify efficient protocols of secure quantum communication*? Quantum 2012, INRIM*, Turin, Italy, May 21-25.**Pathak, A. (**2012)Nonclassical properties of Fock state superpositions,*XVIII Czech-Polish-Slovak Optical Conference*, Ostravice, Czech Republic, September 4-7, Book of Abstracts, p. 116.- Rahman, M., Banerjee, A., Dueck, G. W., and
**Pathak, A.****, (**2012). Two-qubit quantum gates to reduce the quantum cost ofreversible circuit,*International Workshop on Quantum Information(IWQI-2012),*20 -26 February, at HRI, Allahabad, India. **Pathak, A.,**and Banerjee, A. (2011). Quantitative measures of quality of quantum circuits,*20*11-15, July, Srajevo, Bosnia and Herzegovina, Paper No. 7.5.4, p.18 of Book of Abstract of Seminar no. 7.^{th}International Laser Physics Workshop (LPHYS’11),- Verma, A., Sharma, N. K., and
**Pathak, A.**(2011). Nonclassical properties of Intermediate states,*International Conference on Quantum Optics and Quantum Computing (ICQOQC-11)*, 24-26 March, JIIT, Noida, p. 45. - Sen, B., and
**Pathak, A.**(2011).Intermode entanglement in stimulated and spontaneous Raman processes,*International Conference on Quantum Optics and Quantum Computing (ICQOQC-11),*24-26 March, JIIT, Noida, p.43. - Banerjee, A., and
**Pathak, A., (**2011). Some observations on reversible and quantum circuits,*International Conference on Quantum Optics and Quantum Computing (ICQOQC-11)*, 24-26 March, JIIT, Noida, p. 41. - Banerjee, A., and
**Pathak, A.**(2011). Quantum information processing with GHZ-like states, International Conference on Quantum Optics and Quantum Computing (ICQOQC-11), 24-26 March, JIIT, Noida, p. 79. - Sharma,N. K.,Verma,A., Sen, B., and
**Pathak, A.**(2011).Non-classical properties of Atom-Molecule BEC revisited*,**International Conference on Quantum Optics and Quantum Computing (ICQOQC-11)*, 24-26 March, JIIT, Noida, p. 89. *Banerjee, A., and***Pathak, A.**(2007). Probabilistic model of fault detection in quantum circuits, QIP-08, Delhi (December, 07).*Verma, A., and***Pathak, A.**(2007). Higher order antibunching and subpoissonian photon statistics in five wave mixing process, NLS-7, Baroda (December,07) 249.- Gupta, M., and
**Pathak, A.**(2006).Distributed Quantum search through Simultaneous State Transfer, Quantum Computing: Back Action, IIT Kanpur, India (March, 2006) 39. - Gupta
**,**P. and**Pathak, A.**(2006).Higher Order Squeezing and Minimum Total Noise in Different Optical Processes,*2*Delhi, March, 2006, p 95.^{nd}International conference on Current Developments in Atomic Molecular and Optical Physics, CDAMOP-06, **Pathak, A.,**and Gupta, P.(2005). Total quantum fluctuation as a measure of nonclassicality,*International Conference on Quantum Optics, Hong Kong, December 2005*, 12. (also in ActaSinica Quantum Optica**12**(2006) 73).- Gupta, M., and
**Pathak, A.**(2005).Distributed Quantum Computing Using Quantum Optical Nonlocal Quantum Gate,*National Conference in Lasers and their applications in Basic and Applied Sciences, NCLBS-05*, Shantiniketan (January, 2005), 17. **Pathak, A.**(2002). .Matter-field interaction in an (m-1)th order nonlinear medium,*International Workshop on Optical Solitons: Theory and Experiments,*Kochi.