Atom-atom entanglement by single-photon detection

Abstract

A scheme for entangling distant atoms is realized, as proposed in the seminal paper by Cabrillo et al. [Phys. Rev. A 59, 1025 (1999)]. The protocol is based on quantum interference and detection of a single photon scattered from two effectively one meter distant laser-cooled and trapped atomic ions. The detection of a single photon heralds entanglement of two internal states of the trapped ions with high rate and with a fidelity limited mostly by atomic motion. Control of the entangled state phase is demonstrated by changing the path length of the single-photon interferometer.

References in corpus (5)

• An Elementary Quantum Network of Single Atoms in Optical Cavities
• Bell inequality violation with two remote atomic qubits
• Distributed Quantum Computation Based-on Small Quantum Registers
• Photon-Mediated Interaction between Two Distant Atoms
• Entanglement of distant atoms by projective measurement: The role of detection efficiency

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