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quant-ph2002
Squeezing concentration for Gaussian states with unknown parameter
Radim Filip, Ladislav Mišta
A continuous-variable analog of the Deutsch's distillation protocol locally operating with two copies of the same Gaussian state is suggested. Irrespectively of the impossibility o…
quant-ph2002
Optimization of security costs in nested purification protocol
Radim Filip
We analyse security costs in one segment of nested purification protocol in a large quantum cryptography network, employing the quantum switchers and repeaters. We demonstrate that…
quant-ph2002
Nonlocality degradation of two-mode squeezed vacuum in absorbing optical fibers
Radim Filip, L. Mista
Transfer of nonlocal two-mode squeezed vacuum state through symmetrical and asymmetrical lossy channel is analysed and we demonstrate that the nonlocality is more robust against lo…