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Heralded non-destructive quantum entangling gate with single-photon sources
- Source :
- Phys. Rev. Lett. 126, 140501 (2021)
- Publication Year :
- 2020
-
Abstract
- Heralded entangling quantum gates are an essential element for the implementation of large-scale optical quantum computation. Yet, the experimental demonstration of genuine heralded entangling gates with free-flying output photons in linear optical system, was hindered by the intrinsically probabilistic source and double-pair emission in parametric down-conversion. Here, by using an on-demand single-photon source based on a semiconductor quantum dot embedded in a micro-pillar cavity, we demonstrate a heralded controlled-NOT (CNOT) operation between two single photons for the first time. To characterize the performance of the CNOT gate, we estimate its average quantum gate fidelity of ($87.8\pm1.2$)%. As an application, we generated event-ready Bell states with a fidelity of ($83.4\pm2.4$)%. Our results are an important step towards the development of photon-photon quantum logic gates.<br />Comment: main text: 5 pages, 3 figures; supplement: 18 pages, 2 figure, 2 tables; comments are welcome!
- Subjects :
- Quantum Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 126, 140501 (2021)
- Publication Type :
- Report
- Accession number :
- edsarx.2010.14788
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.126.140501