Quantum interference from remotely trapped ions
S. Gerber, D. Rotter, M. Hennrich, R. Blatt, F. Rohde, C. Schuck, M., Almendros, R. Gehr, F. Dubin, J. Eschner
TL;DR
This paper demonstrates quantum interference of photons emitted by two independently trapped ions of different species, with experimental results matching theoretical predictions, highlighting the coherence properties of resonance fluorescence.
Contribution
It presents the first observation of high-contrast quantum interference from remotely trapped ions of different species, supported by quantitative theoretical modeling.
Findings
High-contrast two-photon interference observed
Interference consistent with Bloch equation calculations
Coherence of resonance fluorescence determined from interference
Abstract
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, calcium and barium. 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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