260 citations · 865 across the 20 of their papers we have counts for
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Benford analysis of quantum critical phenomena: First digit provides high finite-size scaling exponent while first two and further are not much better
Anindita Bera, Utkarsh Mishra, Sudipto Singha Roy +3
Benford's law is an empirical edict stating that the lower digits appear more often than higher ones as the first few significant digits in statistics of natural phenomena and math…
Phase boundaries in alternating field quantum XY model with Dzyaloshinskii-Moriya interaction: Sustainable entanglement in dynamics
Saptarshi Roy, Titas Chanda, Tamoghna Das +3
We report all phases and corresponding critical lines of the quantum anisotropic transverse XY model with Dzyaloshinskii-Moriya (DM) interaction along with uniform and alternating…
Deterministic Quantum Dense Coding Networks
Saptarshi Roy, Titas Chanda, Tamoghna Das +2
We consider the scenario of deterministic classical information transmission between multiple senders and a single receiver, when they a priori share a multipartite quantum state -…
Emergence of entanglement with temperature and time in factorization-surface states
Titas Chanda, Tamoghna Das, Debasis Sadhukhan +3
There exist zero-temperature states in quantum many-body systems that are fully factorized, thereby possessing vanishing entanglement, and hence being of no use as resource in quan…
Wave-particle duality employing quantum coherence in superposition with non-orthogonal pointers
Sreetama Das, Chiranjib Mukhopadhyay, Sudipto Singha Roy +3
We propose the notion of quantum coherence for superpositions over states which are not necessarily mutually orthogonal. This anticipatedly leads to a resource theory of non-orthog…
Scale-invariant freezing of entanglement
Titas Chanda, Tamoghna Das, Debasis Sadhukhan +3
We show that bipartite entanglement in a one-dimensional quantum spin model undergoing time-evolution under local Markovian environments can be frozen over time. We demonstrate thi…
Activation of Nonmonogamous Multipartite Quantum States
Saptarshi Roy, Tamoghna Das, Asutosh Kumar +2
The monogamy relation for quantum correlations is not satisfied by all measures for all multiparty quantum states. We prove that an arbitrary quantum state which is nonmonogamous f…
Masking quantum information is impossible
Kavan Modi, Arun Kumar Pati, Aditi Sen De +1
Classical information encoded in composite quantum states can be completely hidden from the reduced subsystems and may be found only in the correlations. Can the same be true for q…
Generalized Geometric Measure of Entanglement for Multiparty Mixed States
Tamoghna Das, Sudipto Singha Roy, Shrobona Bagchi +3
Computing entanglement of an arbitrary bipartite or multipartite mixed state is in general not an easy task as it usually involves complex optimization. Here we show that exploitin…
Reducing Computational Complexity of Quantum Correlations
Titas Chanda, Tamoghna Das, Debasis Sadhukhan +3
We address the issue of reducing the resource required to compute information-theoretic quantum correlation measures like quantum discord and quantum work deficit in two qubits and…
Thermal Fluctuations Enhance Order-from-Disorder of Quantum Correlations in Quenched Disordered Spin Models
Debasis Sadhukhan, R. Prabhu, Aditi Sen De +1
We consider paradigmatic quenched disordered quantum spin models, viz., the XY spin glass and random-field XY models, and show that quenched averaged quantum correlations can exhib…
Distributed quantum dense coding with two receivers in noisy environments
Tamoghna Das, R. Prabhu, Aditi Sen De +1
We investigate the effect of noisy channels in a classical information transfer through a multipartite state which acts as a substrate for the distributed quantum dense coding prot…
To freeze or not to: Quantum correlations under local decoherence
Titas Chanda, Amit Kumar Pal, Anindya Biswas +2
We provide necessary and sufficient conditions for freezing of quantum correlations as measured by quantum discord and quantum work deficit in the case of bipartite as well as mult…
Constructive Interference Between Disordered Couplings Enhances Multiparty Entanglement in Quantum Heisenberg Spin Glass Models
Utkarsh Mishra, Debraj Rakshit, R. Prabhu +2
Disordered systems form one of the centrestages of research in many body sciences and lead to a plethora of interesting phenomena and applications. A paradigmatic disordered system…
Quantum Correlation with Sandwiched Relative Entropies: Advantageous as Order Parameter in Quantum Phase Transitions
Avijit Misra, Anindya Biswas, Arun K. Pati +2
Quantum discord is a measure of quantum correlations beyond the entanglement-separability paradigm. It is conceptualized by using the von Neumann entropy as a measure of disorder.…
Do Large Number of Parties Enforce Monogamy in All Quantum Correlations?
Asutosh Kumar, R. Prabhu, Aditi Sen De +1
Monogamy is a non-classical property that restricts the sharability of quantum correlation among the constituents of a multipartite quantum system. Quantum correlations may satisfy…
Characterizing Genuine Multisite Entanglement in Isotropic Spin Lattices
Himadri Shekhar Dhar, Aditi Sen De, Ujjwal Sen
We consider a class of large superposed states, obtained from dimer coverings on spin-1/2 isotropic lattices, whose potential usefulness ranges from organic molecules to quantum co…
Information as a resource in distributed quantum systems
Michal Horodecki, Karol Horodecki, Pawel Horodecki +4
A new paradigm for distributed quantum systems where information is a valuable resource is developed. After finding a unique measure for information, we construct a scheme for it's…
Distinguishability of the Bell states
Sibasish Ghosh, Guruprasad Kar, Anirban Roy +2
More than two multipartite orthogonal states cannot always be discriminated (with certainty) if only local operations and classical communication (LOCC) are allowed. Using an exist…