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PreprintCC BY 4.0arXiv

Indistinguishability of single Raman photons from single atoms

  • Pascal Baumgart
  • Max Bergerhoff
  • Jürgen Eschner
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Abstract

We theoretically investigate the indistinguishability of single photons generated from single trapped 40Ca+ 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.

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Cite

BibTeXRIS
BibTeX
@misc{baumgart2026indistinguishability,
  title = {{Indistinguishability of single Raman photons from single atoms}},
  author = {Pascal Baumgart and Max Bergerhoff and Jürgen Eschner},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.17009},
  eprint = {2609.17009},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.17009},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Indistinguishability of single Raman photons from single atoms
AU  - Pascal Baumgart
AU  - Max Bergerhoff
AU  - Jürgen Eschner
PY  - 2026
DA  - 2026/09/15
PB  - arXiv
DO  - 10.48550/arxiv.2609.17009
UR  - https://arxiv.org/abs/2609.17009
AB  - We theoretically investigate the indistinguishability of single photons generated from single trapped ^40Ca^+ 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.
ER  -