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quant-ph2025
Optimal Hamiltonian for a quantum state with finite entropy
M. E. Shirokov
We consider the following task: how for a given quantum state to find a grounded Hamiltonian satisfying the condition in such a way that th…
quant-ph2025
Upper bounds on the Holevo quantity arising from the fundamental entropic inequality
M. E. Shirokov
We show how the fundamental entropic inequality proved recently in [arXiv:2408.15306] can be applied to obtain a useful relation for the Holevo quantity of discrete and continuous…
quant-ph2025
The Alicki-Fannes-Winter technique in the quasi-classical settings: advanced version and its applications
M. E. Shirokov
We describe an advanced version of the AFW-technique proposed in [Lett. Math. Phys., 113, 121 (2023)],[Lobachevskii J. Math., 44(6), 2169 (2023)] which allows us to obtain lower se…