Journal
NEW JOURNAL OF PHYSICS
Volume 11, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/11/1/013032
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Funding
- Austrian Science Fund (FWF) [SFB15, M889-N02]
- European Commission [HPRNCT-2000-00121, IST-1999-13021, 015714, MRTN-CT-2006-035369]
- Institut fur Quanteninformation GmbH
- Spanish MEC [CSD2006-00019, FIS2005-08257, FIS2007-66944]
- Generalitat de Catalunya [2005SGR00189]
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We observe quantum interference of photons emitted by two continuously laser-excited single ions, independently trapped in distinct vacuum vessels. High contrast two-photon interference is observed in two experiments with different ion species, Ca+ and Ba+. Our experimental findings are quantitatively reproduced by Bloch equation calculations. In particular, we show that the coherence of the individual resonance fluorescence light field is determined from the observed interference.
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