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quant-ph2020★ 1 cited
Private quantum channels for multi-photon pulses and unitary k-designs
Jan Bouda, Michal Sedlák, Mario Ziman
We address the question of existence of private quantum channel for qubits encoded in polarization degrees of freedom of a photon, that remains secure even if multi-photon (instead…
quant-ph2020★ 11 cited
Probabilistic storage and retrieval of qubit phase gates
Michal Sedlák, Mário Ziman
Probabilistic storage and retrieval (PSR) of unitary quantum dynamics is possible with exponentially small failure probability with respect to the number of systems used as a quant…