Entanglement induced transparency and applications

Details Entanglement induced transparency and applications Entanglement induced transparency and applications

2009-05-11

arxiv.org/abs/0905.1560v1

Phys. Rev. A 80, 032329 (2009)

Physics

Quantum Physics

4 figures

Scientific paper

We point out a symmetry exhibited by pairs of entangled states and discuss its possible applications in quantum information. More specifically, we consider quadripartite systems prepared in bipartite product states of the form $|\Psi> = |\psi>_{12} \otimes |\psi>_{34}$ and let the uncorrelated subsystems 14 and 23 interact by a given unitary $U_{14}\otimes U_{23}$: we show that the entanglement between the noninteracting subsystems 12 and 34 may induce transparency, i.e. makes $|\Psi>$ an eigenstate of the unitary. We investigate the occurrence of this phenomenon both in continuous variable and qubit systems, and discuss its possible applications to bath engineering, double swapping and remote inversion.

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