Quantum cloning a pair of orthogonally polarized photons with linear optics

Details Quantum cloning a pair of orthogonally polarized photons with linear optics Quantum cloning a pair of orthogonally polarized photons with linear optics

2007-11-27

arxiv.org/abs/0711.4212v1

Phys. Rev. A 77, 052308 (2008).

Physics

Quantum Physics

6 pages, 2 figures, RevTeX4

Scientific paper

10.1103/PhysRevA.77.052308

A linear optical probabilistic scheme for the optimal cloning of a pair of orthogonally-polarized photons is devised, based on single- and two-photon interferences. It consists in a partial symmetrization device, realized with a modified unbalanced Mach-Zehnder interferometer, followed by two independent Hong-Ou-Mandel interferometers. This scheme has the advantage that it enables quantum cloning without the need for stimulated amplification in a nonlinear medium. It can also be modified so to make an optical two-qubit partial SWAP gate, thereby providing a potentially useful tool to linear optics quantum computing.

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