Publications (155)
Higher order nonclassicalities in a codirectional nonlinear optical coupler: Quantum entanglement, squeezing and antibunching
Kishore Thapliyal, Anirban Pathak, Biswajit Sen +1
Higher order nonclassical properties of fields propagating through a codirectional asymmetric nonlinear optical coupler which is prepared by combining a linear wave guide and a non…
Generalised quantum anharmonic oscillator using an operator ordering approach
Anirban Pathak
We construct a generalised expression for the normal ordering of (a+a^{\dagger})^{m} for integral values of m and use the result to study the quantum anharmonic oscillator problem…
Wigner distribution, nonclassicality and decoherence of generalized and reciprocal binomial states
Anirban Pathak, J. Banerji
There are quantum states of light that can be expressed as finite superpositions of Fock states (FSFS). We demonstrate the nonclassicality of an arbitrary FSFS by means of its phas…
Higher order antibunching and subpossonian photon statistics in five wave mixing process
Amit Verma, Anirban Pathak
We have investigated the possibility of observing higher order antibunching (HOA) and higher order subpossonian photon statistics (HOSPS) in five wave mixing and third harmonic gen…
Higher Order Squeezing and Higher Order Subpoissonian Photon Statistics in Intermediate States
Amit Verma, Anirban Pathak
Recently simpler criteria for the Hong-Mandel higher order squeezing (HOS) and higher order subpossonian photon statistics (HOSPS) are provided by us [Phys. Lett. A 374 (2010) 1009…
Controlled-Joint Remote Implementation of Operators and its Possible Generalization
Satish Kumar, Nguyen Ba An, Anirban Pathak
The existing notion of the shared entangled state-assisted remote preparation of unitary operator (equivalently the existing notion of quantum remote control) using local operation…
Anonymous voting scheme using quantum assisted blockchain
Sandeep Mishra, Kishore Thapliyal, S Krish Rewanth +2
Voting forms the most important tool for arriving at a decision in any institution. The changing needs of the civilization currently demands a practical yet secure electronic votin…
Collective attack free controlled quantum key agreement without quantum memory
Arindam Dutta, Anirban Pathak
Here we present a new protocol for controlled quantum key agreement and another protocol for key agreement with a specific focus on the security analysis. Specifically, detailed se…
Benford's distribution in extrasolar world: Do the exoplanets follow Benford's distribution?
Abhishek Shukla, Ankit Kumar Pandey, Anirban Pathak
In many real life situations, it is observed that the first digits (i.e., ) of a numerical data-set, which is expressed using decimal system, do not follow a random d…
Complete characterization of the directly implementable quantum gates used in the IBM quantum processors
Abhishek Shukla, Mitali Sisodia, Anirban Pathak
Quantum process tomography of each directly implementable quantum gate used in the IBM quantum processors is performed to compute gate error in order to check viability of complex…
Quantum sealed-bid auction using a modified scheme for multiparty circular quantum key agreement
Rishi Dutt Sharma, Kishore Thapliyal, Anirban Pathak
A feasible, secure and collusion-attack-free quantum sealed-bid auction protocol is proposed using a modified scheme for multi-party circular quantum key agreement. In the proposed…
A Simplified Hierarchical Dynamic Quantum Secret Sharing Protocol with Added Features
Sandeep Mishra, Chitra Shukla, Anirban Pathak +2
Generalizing the notion of dynamic quantum secret sharing (DQSS), a simplified protocol for hierarchical dynamic quantum secret sharing (HDQSS) is proposed and it is shown that the…
Bounds on semi-device-independent quantum random number expansion capabilities
Vaisakh Mannalath, Anirban Pathak
The randomness expansion capabilities of semi-device-independent (SDI) prepare and measure protocols are analyzed under the sole assumption that the Hilbert state dimension is know…
Experimental implementation of distributed phase reference quantum key distribution protocols
Satish Kumar, Priya Malpani, Britant +2
Quantum cryptography is now considered as a promising technology due to its promise of unconditional security. In recent years, rigorous work is being done for the experimental rea…
A Comprehensive Review of Quantum Random Number Generators: Concepts, Classification and the Origin of Randomness
Vaisakh Mannalath, Sandeep Mishra, Anirban Pathak
Random numbers are central to cryptography and various other tasks. The intrinsic probabilistic nature of quantum mechanics has allowed us to construct a large number of quantum ra…
Open quantum system dynamics of -states: Entanglement sudden death and sudden birth
Nikhitha Nunavath, Sandeep Mishra, Anirban Pathak
The origin of disentanglement for two specific sub-classes of -states namely maximally nonlocal mixed states (MNMSs) and maximally entangled mixed states (MEMSs) is investigated…
Reduction of Quantum Phase Fluctuations in Intermediate States
Amit Verma, Anirban Pathak
Recently we have shown that the reduction of the Carruthers-Nieto symmetric quantum phase fluctuation parameter (U) with respect to its coherent state value corresponds to an antib…
Can we control the amount of useful nonclassicality in a photon added hypergeometric state?
Priya Malpani, Kishore Thapliyal, Anirban Pathak
Non-Gaussianity inducing operations are studied in the recent past from different perspectives. Here, we study the role of photon addition, a non-Gaussianity inducing operation, in…
Kak's three-stage protocol of secure quantum communication revisited: Hitherto unknown strengths and weaknesses of the protocol
Kishore Thapliyal, Anirban Pathak
Kak's three-stage protocol for quantum key distribution is revisited with special focus on its hitherto unknown strengths and weaknesses. It is shown that this protocol can be used…
Study of Proton Transfer Reaction Dynamics in Pyrrole 2-Carboxyldehyde
Papia Chowdhury, Rakesh Kumar, Prakash Chandra Sati +1
Photophysical and photochemical dynamics of ground state and excited state proton transfer reaction is reported for Pyrrole 2-Carboxyldehyde (PCL). Steady state absorption and emis…
Controlled bidirectional remote state preparation in noisy environment: A generalized view
Vishal Sharma, Chitra Shukla, Subhashish Banerjee +1
It is shown that a realistic, controlled bidirectional remote state preparation is possible using a large class of entangled quantum states having a particular structure. Existing…
Continuous variable B92 quantum key distribution protocol using single photon added and subtracted coherent states
Srikara S, Kishore Thapliyal, Anirban Pathak
In this paper, a continuous variable B92 quantum key distribution (QKD) protocol is proposed using single photon added and subtracted coherent states, which are prepared by adding…
How vulnerable are the Indian banks: A cryptographers' view
Anirban Pathak, Rishi Dutt Sharma, Dhananjoy Dey
With the advent of e-commerce and online banking it has become extremely important that the websites of the financial institutes (especially, banks) implement up-to-date measures o…
Semi-quantum communication: Protocols for key agreement, controlled secure direct communication and dialogue
Chitra Shukla, Kishore Thapliyal, Anirban Pathak
Semi-quantum protocols that allow some of the users to remain classical are proposed for a large class of problems associated with secure communication and secure multiparty comput…
Higher order two-mode and multi-mode entanglement in Raman processes
Sandip Kumar Giri, Biswajit Sen, Anirban Pathak +1
The existence of higher order entanglement in the stimulated and spontaneous Raman processes is established using the perturbative solutions of the Heisenberg equations of motion f…
Quasiprobability distributions in open quantum systems: spin-qubit systems
Kishore Thapliyal, Subhashish Banerjee, Anirban Pathak +2
Quasiprobability distributions (QDs) in open quantum systems are investigated for , spin like systems, having relevance to quantum optics and information. In this work, effe…
Nonclassical properties of a contradirectional nonlinear optical coupler
Kishore Thapliyal, Anirban Pathak, Biswajit Sen +1
We investigate the nonclassical properties of output fields propagated through a contradirectional asymmetric nonlinear optical coupler consisting of a linear waveguide and a nonli…
Quantum and semi-quantum sealed-bid auction: Vulnerabilities and advantages
Pramod Asagodu, Kishore Thapliyal, Anirban Pathak
A family of existing protocols for quantum sealed-bid auction is critically analyzed, and it is shown that they are vulnerable under several attacks (e.g., the participant's and no…
Orthogonal-state-based and semi-quantum protocols for quantum private comparison in noisy environment
Kishore Thapliyal, Rishi Dutt Sharma, Anirban Pathak
Private comparison is a primitive for many cryptographic tasks, and recently several schemes for the quantum private comparison (QPC) have been proposed, where two users can compar…
Use of Nash equilibrium in finding game theoretic robust security bound on quantum bit error rate
Arindam Dutta, Anirban Pathak
Nash equilibrium is employed to find a game theoretic robust security bound on quantum bit error rate (QBER) for DL04 protocol which is a scheme for quantum secure direct communica…
Continuous variable direct secure quantum communication using Gaussian states
Srikara S, Kishore Thapliyal, Anirban Pathak
Continuous variable one-way and controlled-two-way secure direct quantum communication schemes have been designed using Gaussian states. Specifically, a scheme for continuous varia…
Experimental quantum mechanics in the class room: Testing basic ideas of quantum mechanics and quantum computing using IBM quantum computer
Anirban Pathak
Since the introduction of quantum mechanics, it has been taught mostly as a theoretical subject. It is also viewed as a theory that provides a best understanding of the nature, but…
Nonclassicality in non-degenerate hyper-Raman processes
Kishore Thapliyal, Anirban Pathak, Biswajit Sen +1
A perturbative analytic operator solution of a completely quantum mechanical Hamiltonian of multi-photon pump non-degenerate hyper-Raman process is obtained. It is shown that the o…
Comment on "Quantum Teleportation of Eight-Qubit State via Six-Qubit Cluster State"
Mitali Sisodia, Anirban Pathak
Recently, Zhao et al., (Int. J. Theor. Phys. 57, 516-522 (2018)) have proposed a scheme for quantum teleportation of an eight-qubit quantum state using a six qubit cluster state. I…
Aharanov Anandan Phase for the Quasi Exactly Solvable Bose Systems
Anirban Pathak
An extended notion of quasi-exactly solvable potential model is used here to treat quasi exactly solvable (QES) Bose systems. We report an analytic expression for the Ahoronov Anan…
Enhancement of non-Gaussianity and nonclassicality of photon added displaced Fock state: A quantitative approach
Priya Malpani, Kishore Thapliyal, J. Banerji +1
Non-Gaussian and nonclassical states and processes are already found to be important resources for performing various tasks related to quantum gravity and quantum information proce…
Quantum cryptography over non-Markovian channels
Kishore Thapliyal, Anirban Pathak, Subhashish Banerjee
A set of schemes for secure quantum communication are analyzed under the influence of non-Markovian channels. By comparing with the corresponding Markovian cases, it is seen that t…
Lower- and higher-order nonclassical properties of photon added and subtracted displaced Fock states
Priya Malpani, Nasir Alam, Kishore Thapliyal +3
Nonclassical properties of photon added and subtracted displaced Fock states have been studied using various witnesses of lower- and higher-order nonclassicality. Compact analytic…
Entanglement Routing and Bottlenecks in Grid Networks
Vaisakh Mannalath, Anirban Pathak
Distributing entangled pairs among multiple users is a fundamental problem in quantum networks. Existing protocols like protocol introduced in (npj Quantum Information 5, 76 (2…
A hybrid scheme for prime factorization and its experimental implementation using IBM quantum processor
Ashwin Saxena, Abhishek Shukla, Anirban Pathak
We report a quantum-classical hybrid scheme for factorization of bi-prime numbers (which are odd and square-free) using IBM's quantum processors. The hybrid scheme proposed here in…
Effects of Markovian noise and cavity disorders on the entanglement dynamics of double Jaynes-Cummings models
Harsh Rathee, Kishore Thapliyal, Anirban Pathak
The ability to prepare and manipulate non-classical states, such as entangled qubits, is fundamental to the development of quantum information processing, communication, and comput…
Hierarchical axioms for quantum mechanics
S. Aravinda, Anirban Pathak, R. Srikanth
The origin of nonclassicality in quantum mechanics (QM) has been investigated recently by a number of authors with a view to identifying axioms that would single out quantum mechan…
Design and experimental realization of an optimal scheme for teleportion of an -qubit quantum state
Mitali Sisodia, Abhishek Shukla, Kishore Thapliyal +1
An explicit scheme (quantum circuit) is designed for the teleportation of an -qubit quantum state. It is established that the proposed scheme requires an optimal amount of quant…
The quantum cryptographic switch
Srinatha Narayanaswamy, Omkar Srikrishna, R. Srikanth +2
We illustrate using a quantum system the principle of a cryptographic switch, in which a third party (Charlie) can control to a continuously varying degree the amount of informatio…
Frequency drift corrected ultra-stable laser through phase-coherent fiber producing a quantum channel
Stanley Johnson, Sandeep Mishra, Anirban Pathak +1
Phase coherent fibers (PCF) are essential to distribute nearly monochromatic photons, ultra-stable in their frequency and phases, which have demanding requirements for state-of-the…
Probing quantum correlations in non-degenerate hyper-Raman process
Moumita Das, Biswajit Sen, Ankur Sensharma +2
Possibilities of observing single mode and intermodal quantum correlations (e.g., antibunching, steering and entanglement) are studied for a probed-hyper-Raman system with specific…
Intermodal entanglement in Raman processes
Biswajit Sen, Sandip Kumar Giri, Swapan Mandal +2
The operator solution of a completely quantum mechanical Hamiltonian of the Raman processes is used here to investigate the possibility of obtaining intermodal entanglement between…
Protocols and quantum circuits for implementing entanglement concentration in cat state, GHZ-like state and 9 families of 4-qubit entangled states
Chitra Shukla, Anindita Banerjee, Anirban Pathak
Three entanglement concentration protocols (ECPs) are proposed. The first ECP and a modified version of that are shown to be useful for the creation of maximally entangled cat and…
Quantum e-commerce: A comparative study of possible protocols for online shopping and other tasks related to e-commerce
Kishore Thapliyal, Anirban Pathak
A set of quantum protocols for online shopping is proposed and analyzed to establish that it is possible to perform secure online shopping using different types of quantum resource…
Quantum fluctations of coherent light in nonlinear media
Anirban Pathak
The interaction of coherent light with a nonlinear medium is modeled here by a general quantum anharmonic oscillator. The model is not exactly solvable in a closed analytical form.…
Analysis for satellite-based high-dimensional extended B92 and high-dimensional BB84 quantum key distribution
Arindam Dutta, Muskan, Subhashish Banerjee +1
A systematic analysis of the advantages and challenges associated with the satellite-based implementation of the high dimensional extended B92 (HD-Ext-B92) and high-dimensional BB8…
Continuous variable controlled quantum dialogue and secure multiparty quantum computation
Ashwin Saxena, Kishore Thapliyal, Anirban Pathak
A continuous variable controlled quantum dialogue scheme is proposed. The scheme is further modified to obtain two other protocols of continuous variable secure multiparty computat…
New protocols for quantum key distribution with explicit upper and lower bound on secret key rate
Arindam Dutta, Anirban Pathak
We present two new schemes for quantum key distribution (QKD) that neither require entanglement nor an ideal single-photon source, making them implementable with commercially avail…
Lower- and higher-order nonclassicality in a Bose-condensed optomechanical-like system and a Fabry-Perot cavity with one movable mirror: squeezing, antibunching and entanglement
Nasir Alam, Kishore Thapliyal, Anirban Pathak +3
Various lower- and higher-order nonclassical properties have been studied for two physical systems- (i) an optomechanical system composed of a Fabry-Perot cavity with one nonlinear…
Generation of large Fock states from coherent states using Kerr interaction and displacement
Nilakantha Meher, Anirban Pathak, S. Sivakumar
We discuss a scheme to generate large Fock states. The scheme involves repeatedly applying an experimentally feasible unitary transformation to convert a semiclassical state into a…
Quantum cryptography: key distribution and beyond
Akshata Shenoy H., Anirban Pathak, R. Srikanth
Uniquely among the sciences, quantum cryptography has driven both foundational research as well as practical real-life applications. We review the progress of quantum cryptography…
Multiparty Entanglement Routing in Quantum Networks
Vaisakh Mannalath, Anirban Pathak
Distributing entanglement among multiple users is a fundamental problem in quantum networks, requiring an efficient solution. In this work, a protocol is proposed for extracting ma…
Reduction of Quantum Phase Fluctuations Implies Antibunching of Photon
Prakash Gupta, Anirban Pathak
A clear physical meaning of the Carruthers-Nieto symmetric quantum phase fluctuation parameter (U) has been provided in Susskind Glogower and Barnett Pegg formalism of quantum phas…
Quantum Remote Implementation of Hybrid Operations on Hyperstates Using Hyperentangled States
Satish Kumar, Anirban Pathak
The paper proposes a protocol for quantum remote implementation of arbitrary hybrid operators on a single‑photon two‑qubit hyperstate by simultaneously exploiting polarization and…
Impact of photon addition and subtraction on nonclassical and phase properties of a displaced Fock state
Priya Malpani, Kishore Thapliyal, Nasir Alam +3
Various nonclassical and quantum phase properties of photon added then subtracted displaced Fock state have been examined systematically and rigorously. Higher-order moments of the…
Higher-order nonclassical properties of atom-molecule Bose-Einstein Condensate
Sandip Kumar Giri, Kishore Thapliyal, Biswajit Sen +1
The transient quantum statistical properties of the atoms and molecules in an atom-molecule BEC system are investigated by obtaining a third-order perturbative solution of the Heis…
Quantum networks using counterfactual quantum communication
Aakash Warke, Kishore Thapliyal, Anirban Pathak
Counterfactual quantum communication is one of the most interesting facets of quantum communication, allowing two parties to communicate without any transmission of quantum or clas…
Higher order nonclassicalities of finite dimensional coherent states: A comparative study
Nasir Alam, Amit Verma, Anirban Pathak
Conventional coherent states (CSs) are defined in various ways. For example, CS is defined as an infinite Poissonian expansion in Fock states, as displaced vacuum state, or as an e…
Direct quantum communication without actual transmission of the message qubits
Chitra Shukla, Anirban Pathak
Recently an orthogonal state based protocol of direct quantum communication without actual transmission of particles is proposed by Salih \emph{et al.}{[}Phys. Rev. Lett. \textbf{1…
A mathematical criterion for single photon sources used in quantum cryptography
Anirban Pathak
A single photon source (SPS) is very important for quantum computation. In particular, it is essential for secured quantum cryptography. But there is no perfect SPS in reality. The…
Coherently Driven Quantum Harmonic Oscillator Battery
Kuldeep Gangwar, Anirban Pathak
Quantum harmonic oscillator (QHO) battery models have been studied with significant importance in the recent past because these batteries are experimentally realizable and have hig…
Revisiting Majumdar-Ghosh spin chain model and Max-cut problem using variational quantum algorithms
Britant, Anirban Pathak
In this work, energy levels of the Majumdar-Ghosh model (MGM) are analyzed up to 15 spins chain in the noisy intermediate-scale quantum framework using noisy simulations. This is a…
Asymmetric Quantum Dialogue in Noisy Environment
Anindita Banerjee, Chitra Shukla, Kishore Thapliyal +2
A notion of asymmetric quantum dialogue (AQD) is introduced. Conventional protocols of quantum dialogue are essentially symmetric as both the users (Alice and Bob) can encode the s…
Dynamics of single-mode nonclassicalities and quantum correlations in the Jaynes-Cummings model
Sriram Akella, Kishore Thapliyal, H S Mani +1
Dynamics of atom-field correlations and single-mode nonclassicalities present in the resonant Jaynes-Cummings model are investigated using negativity and entanglement potential for…
United Nation Security Council in Quantum World: Experimental Realization of Quantum Anonymous Veto Protocols using IBM Quantum Computer
Satish Kumar, Anirban Pathak
United Nation (UN) security council has fifteen members, out of which five permanent members of the council can use their veto power against any unfavorable decision taken by the c…
On the generic structures of the protocols for quantum auction and quantum summation and their relation
Kabir Sandhu, Sandeep Mishra, Anirban Pathak
Secure multi-party computation (SMC) addresses the problem of jointly computing global functions of private inputs while revealing minimal information about individual data. Two pr…
Secure Quantum Communication with Orthogonal States
Chitra Shukla, Anindita Banerjee, Anirban Pathak +1
In majority of protocols of secure quantum communication (such as, BB84, B92, etc.), the unconditional security of the protocols are obtained by using conjugate coding (two or more…
Simultaneous quantum identity authentication scheme utilizing entanglement swapping with secret key preservation
Arindam Dutta, Anirban Pathak
Unconditional security in quantum key distribution (QKD) relies on authenticating the identities of users involved in key distribution. While classical identity authentication sche…
Implementation of coherent one way protocol for quantum key distribution up to an effective distance of 145 km
Priya Malpani, Satish Kumar, Anirban Pathak
In the present work, we report experimental realization of an optical fiber based COW protocol for QKD in the telecom wavelength (1550 nm) where the attenuation in the optical fibe…
Comparing coherence measures for X states: Can quantum states be ordered based on quantum coherence?
Sandeep Mishra, Kishore Thapliyal, Anirban Pathak +1
Quantum coherence is an essential resource for quantum information processing and various quantitative measures of it have been introduced. However, the interconnections between th…
Interplay between nonclassicality and symmetry in an effective two level system with open system effects
Javid Naikoo, Subhashish Banerjee, Anirban Pathak
A three level atom in configuration is reduced to an effective two level system, under appropriate conditions, and its symmetric properties are investigated. Th…
A short review on quantum identity authentication protocols: How would Bob know that he is talking with Alice?
Arindam Dutta, Anirban Pathak
Secure communication has achieved a new dimension with the advent of the schemes of quantum key distribution (QKD) as in contrast to classical cryptography, quantum cryptography ca…
Analysis and improvement of Tian-Zhang-Li voting protocol based on controlled quantum teleportation
Kishore Thapliyal, Rishi Dutt Sharma, Anirban Pathak
Recently Tian, Zhang and Li (TZL) have proposed a protocol for voting based on controlled quantum teleportation (Int. J. Theor. Phys. DOI 10.1007/s10773-015-2868-8). We have critic…
Remote Implementation of Hidden or Partially Unknown Quantum Operators using Optimal Resources: A Generalized View
Satish Kumar, Kuldeep Gangwar, Anirban Pathak
Two protocols are proposed for two closely linked but different variants of remote implementation of quantum operators of specific forms. The first protocol is designed for the rem…
An efficient quantum-classical hybrid algorithm for distorted alphanumeric character identification
Ankur Pal, Abhishek Shukla, Anirban Pathak
An algorithm for image processing is proposed. The proposed algorithm, which can be viewed as a quantum-classical hybrid algorithm, can transform a low-resolution bitonal image of…
General structures of reversible and quantum gates
Kishore Thapliyal, Anirban Pathak
The most general structure (in matrix form) of a single-qubit gate is presented. Subsequently, used that to obtain a set of conditions for testing (a) whether a given 2-qubit gate…
Optimization of Circuits for IBM's five-qubit Quantum Computers
Gerhard W. Dueck, Anirban Pathak, Md Mazder Rahman +2
IBM has made several quantum computers available to researchers around the world via cloud services. Two architectures with five qubits, one with 16, and one with 20 qubits are ava…
Noisy three-player dilemma game: Robustness of the quantum advantage
Pranav Kairon, Kishore Thapliyal, R. Srikanth +1
Games involving quantum strategies often yield higher payoff. Here, we study a practical realization of the three-player dilemma game using the superconductivity-based quantum proc…
Phase-space interference of states optically truncated by quantum scissors: Generation of distinct superpositions of qudit coherent states by displacement of vacuum
Adam Miranowicz, Malgorzata Paprzycka, Anirban Pathak +1
Conventional Glauber coherent states (CS) can be defined in several equivalent ways, e.g., by displacing the vacuum or, explicitly, by their infinite Poissonian expansion in Fock s…
Efficient protocols for unidirectional and bidirectional controlled deterministic secure quantum communication: Different alternative approaches
Anirban Pathak
Recently, Hassanpour and Houshmand have proposed a protocol of controlled deterministic secure quantum communication (Quant. Info. Process, DOI 10.1007/s11128-014-0866-z (2014)). T…
On the Synthesis of Sequential Reversible Circuit
Anindita Banerjee, Anirban Pathak
Reversible circuits for SR flip flop, JK flip flop, D flip flop, T flip flop, Master Slave D flip flop and Master Slave JK flip flop have been provided with three different logical…
Orthogonal-state-based protocols of quantum key agreement
Chitra Shukla, Nasir Alam, Anirban Pathak
Two orthogonal-state-based protocols of quantum key agreement (QKA) are proposed. The first protocol of QKA proposed here is designed for two-party QKA, whereas the second protocol…
Statistical mixtures of states can be more quantum than their superpositions: Comparison of nonclassicality measures for single-qubit states
Adam Miranowicz, Karol Bartkiewicz, Anirban Pathak +3
A bosonic state is commonly considered nonclassical (or quantum) if its Glauber-Sudarshan function is not a classical probability density, which implies that only coherent stat…
Linear and nonlinear quantum Zeno and anti-Zeno effects in a nonlinear optical coupler
Kishore Thapliyal, Anirban Pathak, Jan Perina
Quantum Zeno and anti-Zeno effects are studied in a symmetric nonlinear optical coupler, which is composed of two nonlinear () waveguides that are interacting…
Probing nonclassicality in an optically-driven cavity with two atomic ensembles
Javid Naikoo, Kishore Thapliyal, Anirban Pathak +1
The possibility of observing nonclassical features in a physical system comprised of a cavity with two ensembles of two-level atoms has been investigated by considering different c…
Building a Completely Reversible Computer
Martin Lukac, Gerhard W. Dueck, Michitaka Kameyama +1
A critical analysis of the feasibility of reversible computing is performed. The key question is: Is it possible to build a completely reversible computer? A closer look into the i…
Classical and Quantum Oscillators of Sextic and Octic Anharmonicities
Anirban Pathak, Swapan Mandal
Classical oscillators of sextic and octic anharmonicities are solved analytically up to the linear power of λ(Anharmonic Constant) by using Taylor series method. These solutions e…
An algorithm for minimization of quantum cost
Anindita Banerjee, Anirban Pathak
A new algorithm for minimization of quantum cost of quantum circuits has been designed. The quantum cost of different quantum circuits of particular interest (eg. circuits for EPR,…
Are optical quantum information processing experiments possible without beamsplitter?
Kishore Thapliyal, Anirban Pathak
The significance of beamsplitter in experimental optical quantum information processing and quantum technology is discussed with a focus on the role of a beamsplitter-type Hamilton…
Robust phase sensitivity in Mach-Zehnder interferometer using photon added and subtracted squeezed coherent state
Shivani Singh, Priya Malpani, Anirban Pathak
For the precision-based measurements, Mach-Zehnder interferometry is a widely used technique. There are various ways to enhance the precision of Mach-Zehnder interferometer (MZI),…
Relation between squeezing of vacuum fluctuations, quantum entanglement and sub-shot noise in Raman scattering
Anirban Pathak, Jaromir Krepelka, Jan Perina
A completely quantum description of Raman process is used to investigate the nonclassical properties of the modes in the stimulated, spontaneous and partially spontaneous Raman pro…
Generation of higher order nonclassical states via interaction of intense electromagnetic field with third order nonlinear medium
Anirban Pathak
Interaction of intense laser beam with an inversion symmetric third order nonlinear medium is modeled as a quartic anharmonic oscillator. A first order operator solution of the mod…
On the origin of nonclassicality in single systems
S. Aravinda, R. Srikanth, Anirban Pathak
In the framework of certain general probability theories of single systems, we identify various nonclassical features such as incompatibility, multiple pure-state decomposability,…
Finite key analysis of experimentally realized practical COW-QKD protocol
Neha Pathania, Sandeep Mishra, Anirban Pathak
An experimental implementation of the Coherent One-Way Quantum Key Distribution (COW-QKD) protocol is reported under realistic conditions, and a clean and easy-to-use framework for…
Quantum and Semi-Quantum Lottery: Strategies and Advantages
Sandeep Mishra, Anirban Pathak
Lottery is a game in which multiple players take chances in the hope of getting some rewards in cash or kind. In addition, from the time of the early civilizations, lottery has als…