Single-photon two-qubit SWAP gate for entanglement manipulation

Details Single-photon two-qubit SWAP gate for entanglement manipulation Single-photon two-qubit SWAP gate for entanglement manipulation

2004-07-16

arxiv.org/abs/quant-ph/0407136v2

Physics

Quantum Physics

Changes in the body of the paper, one reference added, typos corrected

Scientific paper

10.1103/PhysRevA.72.012318

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 single photons. 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.

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