Indistinguishability of single Raman photons from single atoms

Abstract:We theoretically investigate the indistinguishability of single photons generated from single trapped $^{40}$Ca$^+$ ions in a Raman scattering process driven by few-nanosecond excitation pulses. Of particular interest is how spontaneous decay back to the initial state affects Hong-Ou-Mandel (HOM) photon interference. Numerical simulations identify the mean number of back-decays as a measurable quantity that correlates with achievable HOM visibility. Optimization of the excitation pulse with respect to a trade-off between photon yield and indistinguishability is analyzed. Finally, we compare the performance of different trapped-ion species for long-range dual-rail entanglement swapping via HOM photon interference.

arXiv:2609.17009 [quant-ph]

(or arXiv:2609.17009v1 [quant-ph] for this version)

https://doi.org/10.48550/arXiv.2609.17009 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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