Subhashish Banerjee
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View article: Quantum State Transfer and Periodicity in Discrete‐Time Quantum Walks Under Non‐Markovian Dephasing Noise
Quantum State Transfer and Periodicity in Discrete‐Time Quantum Walks Under Non‐Markovian Dephasing Noise Open
In quantum communication, quantum state transfer from one location to another in a quantum network plays a prominent role, where the impact of noise could be crucial. The idea of state transfer can be fruitfully associated with quantum wal…
View article: Bounds on concatenated entanglement-assisted quantum error-correcting codes
Bounds on concatenated entanglement-assisted quantum error-correcting codes Open
Code concatenation combines two or more component codes to design larger codes with greater noise resilience. Introducing entanglement assistance to concatenated codes provides a further advantage in terms of improved error rates and beati…
View article: Supervised Machine Learning for Predicting Open Quantum System Dynamics and Detecting Non-Markovian Memory Effects
Supervised Machine Learning for Predicting Open Quantum System Dynamics and Detecting Non-Markovian Memory Effects Open
We present a \emph{novel} and scalable supervised machine learning framework to predict open-quantum system dynamics and detect non-Markovian memory using only local ancilla measurements. A system qubit is coherently coupled to an ancilla …
View article: Husimi phase distribution in non-Gaussian operations
Husimi phase distribution in non-Gaussian operations Open
The Husimi phase distribution, an experimentally measurable quantity, is investigated for single-mode and two-mode squeezed vacuum states. The analysis highlights that non-Gaussian operations, i.e., photon subtraction (PS), photon addition…
View article: Satellite‐Based Communication for Phase‐Matching Measurement‐Device‐Independent Quantum Key Distribution
Satellite‐Based Communication for Phase‐Matching Measurement‐Device‐Independent Quantum Key Distribution Open
This study investigates the feasibility of the phase‐matching measurement‐device‐independent quantum key distribution (PM‐MDI QKD) protocol proposed by Lin and Lütkenhaus for satellite‐based quantum communication. The protocol's key rate, …
View article: Interferometric and Bipartite OTOC for Non-Markovian Open Quantum Spin-Chains and Lipkin-Meshkov-Glick Model
Interferometric and Bipartite OTOC for Non-Markovian Open Quantum Spin-Chains and Lipkin-Meshkov-Glick Model Open
The information scrambling phenomena in an open quantum system modeled by Ising spin chains coupled to Lipkin-Meshkov-Glick (LMG) baths are observed via an interferometric method for obtaining out-of-time-ordered correlators ($\mathcal{F}-…
View article: Quantum steganography using catalytic and entanglement-assisted quantum codes
Quantum steganography using catalytic and entanglement-assisted quantum codes Open
Steganography is the technique for transmitting a secret message by employing subterfuge to conceal it in innocent-looking data, rather than by overt security measures as in cryptography. Typically, non-degenerate quantum error-correcting …
View article: (Thermo-)dynamics of the spin-boson model in the weak coupling regime: Application as a quantum battery
(Thermo-)dynamics of the spin-boson model in the weak coupling regime: Application as a quantum battery Open
We investigate the spin-boson model's dynamical and thermodynamic features in the weak coupling regime using the weak coupling spin-boson (WCSB) and phase covariant (PC) master equations. Both unital (pure dephasing) and non-unital (dissip…
View article: Quantum Chaos in Non-Markovian Open Quantum Systems: Interferometric OTOC, Loschmidt Echo and Commutator Operator Norm
Quantum Chaos in Non-Markovian Open Quantum Systems: Interferometric OTOC, Loschmidt Echo and Commutator Operator Norm Open
Out-of-time order correlators (OTOCs) are crucial tools for studying quantum chaos as they show distinct scrambling behavior for chaotic Hamiltonians. We calculate OTOC and analyze the quantum information scrambling in atom-field and spin-…
View article: Two and three-state quantum heat engines with stochastic resetting
Two and three-state quantum heat engines with stochastic resetting Open
Quantum heat engines have undergone extensive studies over the last two decades. Simultaneously, the studies of the applications of stochastic resetting in various fields are on the rise. We explore the effect of stochastic resetting on th…
View article: Finite and Asymptotic Key Analysis for CubeSat-Based BB84 QKD with Elliptical Beam Approximation
Finite and Asymptotic Key Analysis for CubeSat-Based BB84 QKD with Elliptical Beam Approximation Open
Satellite and CubeSat-based quantum key distribution (QKD) presents a promising solution for secure long-distance communication by transmitting quantum keys through free space, with CubeSats offering a compact, cost-effective, and scalable…
View article: Satellite-based communication for phase-matching measurement-device-independent quantum key distribution
Satellite-based communication for phase-matching measurement-device-independent quantum key distribution Open
This study investigates the feasibility of the phase-matching measurement-device-independent quantum key distribution (PM-MDI QKD) protocol proposed by Lin and Lütkenhaus for satellite-based quantum communication. The protocol's key rate, …
View article: Quantum Speed Limit and Nonclassicality in Open Quantum System Models Using the Wigner Function
Quantum Speed Limit and Nonclassicality in Open Quantum System Models Using the Wigner Function Open
The quantum speed limit and the Wigner function of open system models are studied. To this end, the phase covariant and a two‐qubit model interacting with a squeezed thermal bath via position‐dependent coupling are used. The dependence of …
View article: Dynamics of Quantum Coherence and Non-Classical Correlations in Open Quantum System Coupled to a Squeezed Thermal Bath
Dynamics of Quantum Coherence and Non-Classical Correlations in Open Quantum System Coupled to a Squeezed Thermal Bath Open
We investigate the intricate dynamics of quantum coherence and non-classical correlations in a two-qubit open quantum system coupled to a squeezed thermal reservoir. By exploring the correlations between spatially separated qubits, we unra…
View article: Quantum Correlations in Neutrino and Neutral Meson Oscillations
Quantum Correlations in Neutrino and Neutral Meson Oscillations Open
We discuss the impact of ideas of open quantum systems and quantum information to various facets of neutrino and neutral meson oscillations. These oscillations are characterized by a number of quantum correlations, both spatial as well as …
View article: Gravitational Influence on the Quantum Speed Limit in Flavor Oscillations of Neutrino-Antineutrino System
Gravitational Influence on the Quantum Speed Limit in Flavor Oscillations of Neutrino-Antineutrino System Open
We investigate the quantum speed limit (QSL) during the time evolution of neutrino-antineutrino system under the influence of the gravitational field of a spinning primordial black hole (PBH). We derive an analytical expression for the fou…
View article: Increasing quantum speed limit via non-uniform magnetic field
Increasing quantum speed limit via non-uniform magnetic field Open
Quantum speed limit (QSL) defines the theoretical upper bound on how fast a quantum system can evolve between states. It imposes a fundamental constraint on the rate of quantum information processing. For a relativistic spin-up electron in…
View article: Influence of gravity on the quantum speed limit in neutrino oscillations
Influence of gravity on the quantum speed limit in neutrino oscillations Open
The quantum speed limits (QSLs) determine the minimal amount of time required for a quantum system to evolve from an initial to a final state. We investigate QSLs for the unitary evolution of the neutrino-antineutrino system in the presenc…
View article: Realizing Negative Quantum States with the IBM Quantum Hardware
Realizing Negative Quantum States with the IBM Quantum Hardware Open
This study explores robust entangled states described using the framework of discrete Wigner functions. Notably, these states are known to outperform the Bell state in measures of entanglement in the presence of non-Markovian noise. Our st…
View article: Quantum Thermal Analogs of Electric Circuits: A Universal Approach
Quantum Thermal Analogs of Electric Circuits: A Universal Approach Open
In this work, we develop a panoramic schematic of quantum thermal analogs of electric circuits in the steady state regime. We establish the foundations of said premise by defining the analogs of Kirchhoff's laws for heat currents and tempe…
View article: Bipartite OTOC in open quantum systems: information scrambling and irreversibility
Bipartite OTOC in open quantum systems: information scrambling and irreversibility Open
The field of information scrambling has seen significant growth over the last decade, where the out-of-time-ordered correlator (OTOC) has emerged as a prominent tool to probe it. In this work, we use bipartite OTOC, a particular form of OT…
View article: Analysis for Satellite‐Based High‐Dimensional Extended B92 and High‐Dimensional BB84 Quantum Key Distribution
Analysis for Satellite‐Based High‐Dimensional Extended B92 and High‐Dimensional BB84 Quantum Key Distribution Open
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 BB84 (HD‐BB84) protocol is analyzed. The method used earlier f…
View article: Quantum Thermodynamics of Open Quantum Systems: Nature of Thermal Fluctuations
Quantum Thermodynamics of Open Quantum Systems: Nature of Thermal Fluctuations Open
We investigate the thermodynamic behavior of open quantum systems through the Hamiltonian of Mean Force, focusing on two models: a two-qubit system interacting with a thermal bath and a Jaynes-Cummings Model without the rotating wave appro…
View article: Non-Markovianity in Discrete-Time Open Quantum Random Walk on Arbitrary Graphs
Non-Markovianity in Discrete-Time Open Quantum Random Walk on Arbitrary Graphs Open
In this work, we present a new model of the Discrete-Time Open Quantum Walk (DTOQW) applicable to an arbitrary graph, thereby going beyond the case of quantum walks on regular graphs. We study the impact of noise in the dynamics of quantum…
View article: Quantum speed limit and nonclassicality in open quantum system models using the Wigner function
Quantum speed limit and nonclassicality in open quantum system models using the Wigner function Open
The quantum speed limit and the Wigner function of open system models are studied. To this end, we use the phase covariant and a two-qubit model interacting with a squeezed thermal bath via position-dependent coupling. The dependence of th…
View article: Probing $CP$ violation and mass ordering in neutrino oscillations in matter through quantum speed limits
Probing $CP$ violation and mass ordering in neutrino oscillations in matter through quantum speed limits Open
The quantum speed limits (QSLs) set fundamental lower bounds on the time required for a quantum system to evolve from a given initial state to a final state. In this work, we investigate $CP$ violation and the mass ordering problem of neut…
View article: Probing quantum decoherence at Belle II and LHCb
Probing quantum decoherence at Belle II and LHCb Open
A bstract With the advent of Belle II and the LHCb upgrade, the precision measurements of various B-Physics observables are on cards. This holds significant potential for delving into physics beyond the standard model of electroweak intera…
View article: Bipartite OTOC in open quantum systems: information scrambling and irreversibility
Bipartite OTOC in open quantum systems: information scrambling and irreversibility Open
The field of information scrambling has seen significant growth over the last decade, where the out-of-time-ordered correlator (OTOC) has emerged as a prominent tool to probe it. In this work, we use bipartite OTOC, a particular form of OT…