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4 papers · 2 filters
Room temperature entanglement between distant single spins in diamond
Florian Dolde, Ingmar Jakobi, Boris Naydenov +7
Entanglement is the central yet fleeting phenomena of quantum physics. Once being considered a peculiar counter-intuitive property of quantum theory it has developed into the most…
Direct estimation of decoherence rates
Vladimír Bužek, Peter Rapcan, Jochen Rau +1
The decoherence rate is a nonlinear channel parameter that describes quantitatively the decay of the off-diagonal elements of a density operator in the decoherence basis. We addres…
Symmetries and security of a quantum-public-key encryption based on single-qubit rotations
U. Seyfarth, G. M. Nikolopoulos, G. Alber
Exploring the symmetries underlying a previously proposed encryption scheme which relies on single-qubit rotations, we derive an improved upper bound on the maximum information tha…
Photon-assisted entanglement creation by minimum-error generalized quantum measurements in the strong coupling regime
J. Z. Bernád, G. Alber
We explore possibilities of entangling two distant material qubits with the help of an optical radiation field in the regime of strong quantum electrodynamical coupling with almost…