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Long-distance teleportation of atomic qubit via optical interferometry

Y. P. Huang·M. G. Moore
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Abstract

The problem of long-distance teleportation of single-atom qubits via a common photonic channel is examined within the framework of a Mach-Zender optical interferometer. As expected, when a coherent state is used as input, a high-finesse optical cavity is required to overcome sensitivity to spontaneous emission. However, we find that a number-squeezed light field in a twin-Fock state can in principle create useful entanglement without cavity-enhancement. Both approaches require single photon counting detectors, and best results are obtained by combining cavity-feedback with twin-fock inputs. Such an approach may allow a fidelity of $.99$ using a two-photon input and currently available mirror and detector technology. In addition, the present approach can be conveniently extended to generate multi-site entanglement and entanglement swapping, both of which are necessities in quantum networks.

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Y. P. Huang, M. G. Moore. 2006-09-27. Long-distance teleportation of atomic qubit via optical interferometry. https://arxiv.org/abs/quant-ph/0609214

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