Quantum interferences and gates with emitter-based coherent photon sources
- URL: http://arxiv.org/abs/2401.01187v3
- Date: Tue, 24 Sep 2024 10:33:30 GMT
- Title: Quantum interferences and gates with emitter-based coherent photon sources
- Authors: I. Maillette de Buy Wenniger, S. C. Wein, D. Fioretto, S. E. Thomas, C. Antón-Solanas, A. Lemaître, I. Sagnes, A. Harouri, N. Belabas, N. Somaschi, P. Hilaire, J. Senellart, P. Senellart,
- Abstract summary: In 2019, it was shown that the emitted single photon states often include coherence with the vacuum component.
We show how such photon-number coherence alters quantum interference experiments.
We illustrate the impact on quantum protocols by evidencing modifications in heralding efficiency and fidelity of two-qubit gates.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Quantum emitters such as quantum dots, defects in diamond or in silicon have emerged as efficient single photon sources that are progressively exploited in quantum technologies. In 2019, it was shown that the emitted single photon states often include coherence with the vacuum component. Here we investigate how such photon-number coherence alters quantum interference experiments that are routinely implemented both for characterising or exploiting the generated photons. We show that it strongly modifies intensity correlation measurements in a Hong-Ou-Mandel experiment and leads to errors in indistinguishability estimations. It also results in additional entanglement when performing partial measurements. We illustrate the impact on quantum protocols by evidencing modifications in heralding efficiency and fidelity of two-qubit gates.
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