Phys. Rev. A 72, 012318 (2005) [4 pages]Single-photon two-qubit SWAP gate for entanglement manipulationReceived 30 November 2004; published 15 July 2005 A SWAP operation between different types of qubits of single photons is essential for manipulating hyperentangled photons for a variety of applications. We have implemented an efficient SWAP gate for the momentum and polarization degrees of freedom of a single photon. The SWAP gate was utilized in a single-photon two-qubit quantum logic circuit to deterministically transfer momentum entanglement between a pair of down-converted photons to polarization entanglement. The polarization entanglement thus obtained violates Bell’s inequality by more than 150 standard deviations. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.72.012318
DOI:
10.1103/PhysRevA.72.012318
PACS:
03.67.Mn, 03.67.Lx, 42.50.Dv
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