Conditional implementation of a quantum phase gate with distant atoms trapped in different optical cavities

Details Conditional implementation of a quantum phase gate with distant atoms trapped in different optical cavities Conditional implementation of a quantum phase gate with distant atoms trapped in different optical cavities

2004-01-09

arxiv.org/abs/quant-ph/0401042v1

Physics

Quantum Physics

4pages, 2 figures

Scientific paper

We propose a scheme for conditional implementation of a quantum phase gate by using distant atoms trapped in different optical cavities. Instead of direct interaction between atoms, the present scheme makes use of quantum interference of polarized photons decaying from the optical cavities to conditionally create the desired quantum phase gate between two distant atoms. The proposed scheme only needs linear optical elements and a two-fold coincidence detection, and are insensitive to the quantum noise. The scheme can be directly used to prepare any quantum state of many distant atoms.

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