Temporal stretching of single-photon pulses by intra-cavity frequency conversion
Abstract
Spectral bandwidth and frequency mismatch between quantum light emitters and quantum components is a common problem in the realization of hybrid quantum information networks. Here we propose a simultaneous solution to both of these problems by using a free-space cavity with an embedded nonlinear crystal that, through frequency conversion, facilitates perfect coupling into a cavity mode. The slow leakage of the cavity effectively stretches the photon pulse, resulting in a much longer photon pulse at a different wavelength. We show that the amount of stretching is strictly limited by the finesse and length of the cavity. Including realistic internal losses in the cavity, we show that it is possible to stretch a photon by at least two orders of magnitude with high efficiency. The proposed setup can thus constitute a valuable addition to the toolbox of quantum information technologies.
Related
- Pulsed single-photon magnetometry with a Λ-type three-level system: near-optimal frequency-resolved photon counting
- No linear stretching of single-copy quantum pseudorandomness
- Hidden Phase Transition in Single-Polymer Stretching under Elongational Flow
- Plasma instability splits axion-photon conversion lines
- Asymmetric frequency conversion and violation of Kirchhoff’s law of thermal radiation in phased Floquet metasurfaces
BibTeX
@misc{korsgaard2026temporal,
title = {{Temporal stretching of single-photon pulses by intra-cavity frequency conversion}},
author = {Mathias L. H. Korsgaard and Eva M. González-Ruiz and Anders S. Sørensen},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.04771},
eprint = {2611.04771},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.04771},
}
RIS
TY - UNPB
TI - Temporal stretching of single-photon pulses by intra-cavity frequency conversion
AU - Mathias L. H. Korsgaard
AU - Eva M. González-Ruiz
AU - Anders S. Sørensen
PY - 2026
DA - 2026/11/03
PB - arXiv
DO - 10.48550/arxiv.2611.04771
UR - https://arxiv.org/abs/2611.04771
AB - Spectral bandwidth and frequency mismatch between quantum light emitters and quantum components is a common problem in the realization of hybrid quantum information networks. Here we propose a simultaneous solution to both of these problems by using a free-space cavity with an embedded nonlinear crystal that, through frequency conversion, facilitates perfect coupling into a cavity mode. The slow leakage of the cavity effectively stretches the photon pulse, resulting in a much longer photon pulse at a different wavelength. We show that the amount of stretching is strictly limited by the finesse and length of the cavity. Including realistic internal losses in the cavity, we show that it is possible to stretch a photon by at least two orders of magnitude with high efficiency. The proposed setup can thus constitute a valuable addition to the toolbox of quantum information technologies.
ER -