Wavelength-tunable high-fidelity entangled photon sources enabled by dual Stark effects
- URL: http://arxiv.org/abs/2308.04744v2
- Date: Mon, 22 Apr 2024 02:30:10 GMT
- Title: Wavelength-tunable high-fidelity entangled photon sources enabled by dual Stark effects
- Authors: Chen Chen, Jun-Yong Yan, Hans-Georg Babin, Jiefei Wang, Xingqi Xu, Xing Lin, Qianqian Yu, Wei Fang, Run-Ze Liu, Yong-Heng Huo, Han Cai, Wei E. I. Sha, Jiaxiang Zhang, Christian Heyn, Andreas D. Wieck, Arne Ludwig, Da-Wei Wang, Chao-Yuan Jin, Feng Liu,
- Abstract summary: We demonstrate wavelength-tunable entangled photon sources based on droplet-etched GaAs quantum dots.
The emission wavelength can be tuned by 1 meV while preserving an entanglement fidelity f exceeding 0.955(1) in the entire tuning range.
- Score: 24.884496380660117
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The construction of a large-scale quantum internet requires quantum repeaters containing multiple entangled photon sources with identical wavelengths. Semiconductor quantum dots can generate entangled photon pairs deterministically with high fidelity. However, realizing wavelength-matched quantum-dot entangled photon sources faces two difficulties: the non-uniformity of emission wavelength and exciton fine-structure splitting induced fidelity reduction. Typically, these two factors are not independently tunable, making it challenging to achieve simultaneous improvement. In this work, we demonstrate wavelength-tunable entangled photon sources based on droplet-etched GaAs quantum dots through the combined use of AC and quantum-confined Stark effects. The emission wavelength can be tuned by ~1 meV while preserving an entanglement fidelity f exceeding 0.955(1) in the entire tuning range. Based on this hybrid tuning scheme, we finally demonstrate multiple wavelength-matched entangled photon sources with f>0.919(3), paving a way towards robust and scalable on-demand entangled photon sources for quantum internet and integrated quantum optical circuits.
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