Matthias Keller 2-Accepted 5.08.20.pdf (769.1 kB)
Improving the indistinguishability of single photons from an ion-cavity system
journal contribution
posted on 2023-06-07, 07:44 authored by Thomas Walker, Samir Vartabi Kashanian, Travers Ward, Matthias KellerMatthias KellerWe investigate two schemes for generating indistinguishable single photons, a key feature of quantum networks, from a trapped ion coupled to an optical cavity. Through selection of the initial state in a cavity-assisted Raman transition, we suppress the detrimental effects of spontaneous emission on the photon's coherence length, measuring a visibility of 81(2)% without subtraction of background counts in a Hong-Ou-Mandel interference measurement, the highest reported for an ion-cavity system. In comparison, a visbility of 50(2)% was measured using a more conventional single photon scheme. We demonstrate through numerical analysis of the single photon generation process that the new scheme produces photons of a given indistinguishability with a greater efficiency than the conventional one. Single photon schemes such as the one demonstrated here have applications in distributed quantum computing and communications, which rely on high fidelity entanglement swapping and state transfer through indistinguishable single photons.
History
Publication status
- Published
File Version
- Accepted version
Journal
Physical Review AISSN
1050-2947Publisher
American Physical SocietyExternal DOI
Issue
3Volume
102Article number
a032616Pages
6.0Department affiliated with
- Physics and Astronomy Publications
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Dataset for this article is available through the related URLFull text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2020-08-19First Open Access (FOA) Date
2020-08-19First Compliant Deposit (FCD) Date
2020-08-18Usage metrics
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