Somshubhro Bandyopadhyay

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19992026

most citedA new proof for the existence of mutually unbiased bases

581 citations · 2.3k across the 63 of their papers we have counts for

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quant-ph2026

Simple proof of conditions requiring maximal entanglement for local state verification and discrimination

Somshubhro Bandyopadhyay

For deterministic state verification by separable measurements, the Schmidt rank of an entangled resource must be at least that of the state being verified [N. Yu, R. Duan, and M.…

quant-ph2026

Perfect discrimination of an orthogonal $2 \otimes 2$ basis may require collective separable measurements on two copies

Somshubhro Bandyopadhyay

We consider an orthogonal basis of $C^{2} \otimes C^{2}$ with three entangled states and one product state. This basis is not perfectly distinguishable by LOCC or even by…

quant-ph2026

Quantum state exclusion with many copies

Debanjan Roy, Tathagata Gupta, Pratik Ghosal +2

Quantum state exclusion is the task of identifying at least one state from a known set that was not used in the preparation of a quantum system. A set of quantum states is said to…

Simple proof of conditions requiring maximal entanglement for local state verification and discrimination

Perfect discrimination of an orthogonal 2⊗2 basis may require collective separable measurements on two copies

Quantum state exclusion with many copies

Perfect discrimination of an orthogonal $2 \otimes 2$ basis may require collective separable measurements on two copies