43 citations · 257 across the 27 of their papers we have counts for
8 papers · 1 filter
Detecting phase boundaries of quantum spin-1/2 XXZ ladder via bipartite and multipartite entanglement transitions
Sudipto Singha Roy, Himadri Shekhar Dhar, Debraj Rakshit +2
Phase transition in quantum many-body systems inevitably causes changes in certain physical properties which then serve as potential indicators of critical phenomena. Besides the t…
Effects of cavity-cavity interaction on the entanglement dynamics of a generalized double Jaynes-Cummings model
Mahasweta Pandit, Sreetama Das, Sudipto Singha Roy +2
We consider a generalized double Jaynes-Cummings model consisting of two isolated two-level atoms, each contained in a lossless cavity, with the cavities interacting with each othe…
Response to defects in multi- and bipartite entanglement of isotropic quantum spin networks
Sudipto Singha Roy, Himadri Shekhar Dhar, Debraj Rakshit +2
Quantum networks are an integral component in performing efficient computation and communication tasks that are not accessible using classical systems. A key aspect in designing an…
Time Evolution of the Matter Content of the Expanding Universe in the Framework of Brans-Dicke Gravity
Sudipto Roy
A cosmological model has been constructed in the framework of Brans-Dicke (BD) gravity, based on an inter-conversion between matter and dark energy, for a spatially flat universe i…
A Study on the Expanding Universe Based on a Model of the Time Variation of its Matter Content in the Framework of Brans-Dicke Theory
Sudipto Roy, Dibyajyoti Laha, Argho Aranya Sangma +1
A theoretical model of cosmic expansion has been formulated on an assumption of inter-conversion of matter and dark energy, in the framework of Brans-Dicke theory. An empirical sca…
A Study of Cosmic Expansion Generated by Non-conservation of Matter in the Framework of Brans-Dicke Theory
Sudipto Roy, Mohsin Islam
The present study, on the expansion of universe, is based on an assumption regarding the possibility of inter-conversion between matter and dark energy, through some interaction of…
Analytical recursive method to ascertain multisite entanglement in doped quantum spin ladders
Sudipto Singha Roy, Himadri Shekhar Dhar, Debraj Rakshit +2
We formulate an analytical recursive method to generate the wave function of doped short-range resonating valence bond (RVB) states as a tool to efficiently estimate multisite enta…
Conclusive Identification of Quantum Channels via Monogamy of Quantum Correlations
Asutosh Kumar, Sudipto Singha Roy, Amit Kumar Pal +3
We investigate the action of local and global noise on monogamy of quantum correlations, when monogamy scores are considered as observables, and three-qubit systems are subjected t…