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Photonic Quantum Computing

Interference of Spontaneous Emission of Light from two Solid-State Atomic Ensembles

arXiv
Authors: M. Afzelius, M. U. Staudt, H. de. Riedmatten, C. Simon, S. R. Hastings-Simon, R. Ricken, H. Suche, W. Sohler, N. Gisin

Year

2007

Paper ID

49132

Status

Preprint

Abstract Read

~2 min

Abstract Words

112

Citations

N/A

Abstract

We report an interference experiment of spontaneous emission of light from two distant solid-state ensembles of atoms that are coherently excited by a short laser pulse. The ensembles are Erbium ions doped into two LiNbO3 crystals with channel waveguides, which are placed in the two arms of a Mach-Zehnder interferometer. The light that is spontaneously emitted after the excitation pulse shows first-order interference. By a strong collective enhancement of the emission, the atoms behave as ideal two-level quantum systems and no which-path information is left in the atomic ensembles after emission of a photon. This results in a high fringe visibility of 95%, which implies that the observed spontaneous emission is highly coherent.

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  • This paper contributes to the Photonic Quantum Computing research area in the Quantum Articles archive.
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  • We report an interference experiment of spontaneous emission of light from two distant solid-state ensembles of atoms that are coherently excited by a short laser pulse.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:0709.1335 [2] arXiv https://arxiv.org/abs/0709.1335 [3] Publisher https://arxiv.org/abs/0709.1335

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