Towards Stirling cooler operable single-photon sources based on low-noise GaAs quantum dots
Abstract
For photonic quantum technology applications, sources capable of emitting photons with indistinguishability close to unity are essential. Ideally, these sources should not require demanding cooling systems. Here, we present temperature-dependent two-photon-interference measurements on photons produced by the radiative decay of the negative trion in a low-noise GaAs quantum dot, which are in quantitative agreement with theoretical calculations accounting for carrier-phonon interactions and coupling to excited states. While at at the lowest explored temperatures the emission linewidth reaches values only 6(2) % above the Fourier limit and the indistinguishability I between subsequently emitted photons reaches 0.966(6), the latter drops to 0.05(4) at 55 K. We show that this loss can be explained with the coupling with energetically close excited trion states and suggest that the photon indistinguishability at elevated temperatures can be increased by employing Purcell enhancement of the emission rate or by increasing the energy separation of the excited states. Using cavity-enhanced emission, we experimentally verify the first route and demonstrate an improvement in photon indistinguishability from 0.314(25) to 0.80(3) at 32 K, which - to our knowledge - is the highest reported value at such temperature.
Related
- Benchmarking Single-Photon Sources for Measurement-Device-Independent Quantum Key Distribution
- A proposal for a hybrid free-space optical quantum communication network with hexagonal boron nitride-based single photon sources
- Phase-Matching Quantum Key Distribution with Heralded Single-Photon Sources and Local Detection
- On the Completeness of Quantum Mechanics: Sources, Records and Probabilities
- Engineering of Chirped Apodized Sources for Quantum Spectroscopy
BibTeX
@misc{aigner2026towards,
title = {{Towards Stirling cooler operable single-photon sources based on low-noise GaAs quantum dots}},
author = {Maximilian Aigner and Jana Schlücking and Eva Schöll and Christian Weidinger and Gabriel Undeutsch and Ievgen Brytavskyi and Thomas Oberleitner and Tobias Maria Krieger and Ailton Jose Garcia Junior and Melina Peter and Thomas K. Bracht and Michał Gawełczyk and Saimon Filipe Covre da Silva and Santanu Manna and Yusuf Karli and Gregor Weihs and Doris E. Reiter and Armando Rastelli},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2608.24409},
eprint = {2608.24409},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.24409},
note = {CC BY-NC-SA 4.0},
}
RIS
TY - UNPB
TI - Towards Stirling cooler operable single-photon sources based on low-noise GaAs quantum dots
AU - Maximilian Aigner
AU - Jana Schlücking
AU - Eva Schöll
AU - Christian Weidinger
AU - Gabriel Undeutsch
AU - Ievgen Brytavskyi
AU - Thomas Oberleitner
AU - Tobias Maria Krieger
AU - Ailton Jose Garcia Junior
AU - Melina Peter
AU - Thomas K. Bracht
AU - Michał Gawełczyk
AU - Saimon Filipe Covre da Silva
AU - Santanu Manna
AU - Yusuf Karli
AU - Gregor Weihs
AU - Doris E. Reiter
AU - Armando Rastelli
PY - 2026
DA - 2026/09/14
PB - arXiv
DO - 10.48550/arxiv.2608.24409
UR - https://arxiv.org/abs/2608.24409
AB - For photonic quantum technology applications, sources capable of emitting photons with indistinguishability close to unity are essential. Ideally, these sources should not require demanding cooling systems. Here, we present temperature-dependent two-photon-interference measurements on photons produced by the radiative decay of the negative trion in a low-noise GaAs quantum dot, which are in quantitative agreement with theoretical calculations accounting for carrier-phonon interactions and coupling to excited states. While at at the lowest explored temperatures the emission linewidth reaches values only 6(2) % above the Fourier limit and the indistinguishability I between subsequently emitted photons reaches 0.966(6), the latter drops to 0.05(4) at 55 K. We show that this loss can be explained with the coupling with energetically close excited trion states and suggest that the photon indistinguishability at elevated temperatures can be increased by employing Purcell enhancement of the emission rate or by increasing the energy separation of the excited states. Using cavity-enhanced emission, we experimentally verify the first route and demonstrate an improvement in photon indistinguishability from 0.314(25) to 0.80(3) at 32 K, which - to our knowledge - is the highest reported value at such temperature.
ER -