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quant-ph2026
Incompleteness is necessary for activation of nonlocality without entanglement
Atanu Bhunia, Saronath Halder, Preeti Parashar +1
A set of orthogonal product states is said to exhibit "quantum nonlocality without entanglement" if it is locally indistinguishable, i.e. no sequence of local operations and classi…
quant-ph2025
The likelihood operator and Fisher information in quantum probability
Kalyan B. Sinha, Ritabrata Sengupta
We study the problem of Quantum Likelihood Operators (LO) and their connection with quantum Fisher information (QFI). It is observed that the present approaches to this problem tac…
quant-ph2024
Useful variants and perturbations of completely entangled subspaces and spans of unextendible product bases
Ritabrata Sengupta, Ajit Iqbal Singh
Finite dimensional entanglement for pure states has been used extensively in quantum information theory. Depending on the tensor product structure, even set of separable states can…