98 citations · 1.2k across the 60 of their papers we have counts for
5 papers · 1 filter
Entanglement-assisted scheme for nondemolition detection of the presence of a single photon
Marek Bula, Karol Bartkiewicz, Antonín Černoch +1
In this paper, we propose a resources-optimal linear-optical scheme for quantum nondemolition detection of single-photon presence. By measuring the state of ancillary photons, the…
Linear-optical programmable quantum router
Karel Lemr, Antonín Černoch
This paper presents a scheme for linear-optical implementation of a programmable quantum router. Polarization encoded photon qubit is coherently routed to various spatial modes acc…
Entangling efficiency of linear-optical quantum gates
Karel Lemr, Antonín Černoch, Jan Soubusta +1
We propose a new measure of non-classicality of quantum gates which is particularly suitable for probabilistic devices. This measure enables to compare, e.g., deterministic devices…
Experimental Eavesdropping Based on Optimal Quantum Cloning
Karol Bartkiewicz, Karel Lemr, Antonín Černoch +2
The security of quantum cryptography is guaranteed by the no-cloning theorem, which implies that an eavesdropper copying transmitted qubits in unknown states causes their disturban…
Experimental linear-optical implementation of a multifunctional optimal qubit cloner
Karel Lemr, Karol Bartkiewicz, Antonin Cernoch +2
We present the first experimental implementation of a multifunctional device for the optimal cloning of one to two qubits. Previous implementations have always been designed to opt…