140 citations · 703 across the 42 of their papers we have counts for
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Multipartite Entanglement Accumulation in Quantum States: Localizable Generalized Geometric Measure
Debasis Sadhukhan, Sudipto Singha Roy, Amit Kumar Pal +3
Multiparty quantum states are useful for a variety of quantum information and computation protocols. We define a multiparty entanglement measure based on local measurements on a mu…
Survival of time-evolved correlations depends on whether quenching is across critical point in XY spin chain
Utkarsh Mishra, Debraj Rakshit, R. Prabhu
The time-dynamics of quantum correlations in the quantum transverse anisotropic XY spin chain of infinite length is studied at zero as well as finite temperatures. The evolution oc…
Information complementarity in multipartite quantum states and security in cryptography
Anindita Bera, Asutosh Kumar, Debraj Rakshit +3
We derive complementarity relations for arbitrary quantum states of multiparty systems, of arbitrary number of parties and dimensions, between the purity of a part of the system an…
Order-from-disorder and critical scalings of spontaneous magnetization in random-field quantum spin systems
Anindita Bera, Debraj Rakshit, Maciej Lewenstein +3
We investigate the effect of a unidirectional quenched random field on the anisotropic quantum spin-1/2 model, which magnetizes spontaneously in the absence of the random fiel…
Diverging scaling with converging multisite entanglement in odd and even quantum Heisenberg ladders
Sudipto Singha Roy, Himadri Shekhar Dhar, Debraj Rakshit +2
We investigate finite-size scaling of genuine multisite entanglement in the ground state of quantum spin-1/2 Heisenberg ladders. We obtain the ground states of odd- and even-legged…
Enhancement of Quantum Correlation Length in Quenched Disordered Spin Chains
Debasis Sadhukhan, Sudipto Singha Roy, Debraj Rakshit +3
Classical correlations of ground states typically decay exponentially and polynomially, respectively for gapped and gapless short-ranged quantum spin systems. In such systems, enta…
Adiabatic freezing of long-range quantum correlations in spin chains
Himadri Shekhar Dhar, Debraj Rakshit, Aditi Sen De +1
We consider a process to create quasi long-range quantum discord between the non-interacting end spins of a quantum spin chain, with the end spins weakly coupled to the bulk of the…