8 papers · 2 filters
Improving teleportation of continuous variables by local operations
Ladislav Mišta, Radim Filip
We study a continuous-variable (CV) teleportation protocol based on a shared entangled state produced by the quantum-nondemolition (QND) interaction of two vacuum states. The schem…
Experimental demonstration of continuous variable quantum erasing
Ulrik L. Andersen, Oliver Glöckl, Stefan Lorenz +2
We experimentally demonstrate the concept of continuous variable quantum erasing. The amplitude quadrature of the signal state is labelled to another state via a quantum nondemolit…
Partial deterministic non-demolition Bell measurement
Ladislav Mišta, Radim Filip
We propose the scheme implementing partial deterministic non-demolition Bell measurement. When it is used in quantum teleportation the information about an unknown input state is o…
Knowledge excess duality and violation of Bell inequalities
R. Filip, M. Gavenda
A constraint on two complementary knowledge excesses by maximal violation of Bell inequalities for a single copy of any mixed state of two qubits is analyzed. The complementa…
Continuous-variable quantum non-demolishing interaction at a distance
Radim Filip
A feasible setup of continuous-variable (CV) quantum non-demolishing (QND) interaction at a distance is proposed. If two distant experimentalists are able to locally perform identi…
Experimental Purification of Single Qubits
M. Ricci, F. De Martini, N. J. Cerf +3
We report the experimental realization of the purification protocol for single qubits sent through a depolarization channel. The qubits are associated with polarization encoded pho…