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20122026
most citedOptimal quantum communication using multiparticle partially entangled states

17 citations

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quant-ph2026

Coherence thermometry using multipartite quantum systems

Pranav Perumalsamy, Abhijit Mandal, Sovik Roy +1

Accurate temperature measurement at the quantum scale is becoming increasingly important for emerging quantum technologies, motivating the development of quantum thermometry based…

quant-ph2025

Resilience of Quantum Teleportation Fidelity for Bipartite Mixed States near Schwarzschild and Dilaton Black Holes

Abhijit Mandal, Sovik Roy

We investigate the robustness of quantum teleportation in the presence of strong gravitational fields by analysing bipartite mixed states derived from tripartite GHZ and W-class st…

quant-ph2024

Dephasing-Induced Distribution of Entanglement in Tripartite Quantum Systems

Sovik Roy, Md. Manirul Ali, Abhijit Mandal +1

Preserving multipartite entanglement amidst decoherence poses a pivotal challenge in quantum information processing. However, assessing multipartite entanglement in mixed states am…

quant-ph2024★ 10 cited

Teleportation of unknown qubit via Star type tripartite states

Anushree Pandey, Abhijit Mandal, Sovik Roy

Eylee Jung \textit{et.al}\cite{jung2008} had conjectured that is a necessary and sufficient condition for the perfect two-party teleportation and consequently…

quant-ph2024★ 2 cited

Weak-coupling limits of the quantum Langevin equation for an oscillator

Aritra Ghosh, Sushanta Dattagupta

The quantum Langevin equation as obtained from the independent-oscillator model describes a strong-coupling situation, devoid of the Born-Markov approximation that is employed in t…

quant-ph2023★ 1 cited

Entanglement preservation in tripartite quantum systems under dephasing dynamics

Chandrashekar Radhakrishnan, Sovik Roy, Ravikumar Chinnarasu +1

Protecting entanglement from decoherence is a critical aspect of quantum information processsing. For many-body quantum systems evolving under decoherence, estimating multipartite…

quant-ph2022★ 6 cited

Exploring quantum properties of bipartite mixed states under coherent and incoherent basis

Sovik Roy, Anushree Bhattacharjee, Chandrashekar Radhakrishnan +2

Quantum coherence and quantum entanglement are two different manifestations of the superposition principle. In this article we show that the right choice of basis to be used to est…

quant-ph2016★ 2 cited

Operational criterion for controlled dense coding with non-trivial tripartite entangled states

Sovik Roy, Biplab Ghosh, Md. Manirul Ali

In this paper, we provide an operational criterion for controlled dense coding with a general class of three-qubit partially entangled states. A general three-qubit pure entangled…

quant-ph2015

Teleporting single qutrit using symmetric-anti symmetric two-qutrit basis states as quantum channels

Anushree Pandey, Abhijit Mandal, Sovik Roy

This work presents a deterministic scheme for the teleportation of a single qutrit state, held by the sender Alice, using maximally entangled two-qutrit states as resource channels…

quant-ph2012★ 17 cited

Optimal quantum communication using multiparticle partially entangled states

Atul Kumar, Satyabrata Adhikari, Subhashish Banerjee +1

Administratively withdrawn.