Heralded Nondestructive Quantum Entangling Gate with Single-Photon Sources

Jin Peng Li; Xuemei Gu; Jian Qin; Dian Wu; Xiang You; Hui Wang; Christian Schneider; Sven Höfling; Yong Heng Huo; Chao Yang Lu; Nai Le Liu; Li Li; Jian Wei Pan

doi:10.1103/PhysRevLett.126.140501

Heralded Nondestructive Quantum Entangling Gate with Single-Photon Sources

Jin Peng Li, Xuemei Gu, Jian Qin, Dian Wu, Xiang You, Hui Wang, Christian Schneider, Sven Höfling, Yong Heng Huo, Chao Yang Lu, Nai Le Liu, Li Li^*, Jian Wei Pan

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

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 micropillar 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±1.2)%. As an application, we generated event-ready Bell states with a fidelity of (83.4±2.4)%. Our results are an important step towards the development of photon-photon quantum logic gates.

Original language	English
Article number	140501
Journal	Physical Review Letters
Volume	126
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevLett.126.140501
State	Published - 5 Apr 2021
Externally published	Yes

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10.1103/PhysRevLett.126.140501

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title = "Heralded Nondestructive Quantum Entangling Gate with Single-Photon Sources",

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 micropillar 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±1.2)\%. As an application, we generated event-ready Bell states with a fidelity of (83.4±2.4)\%. Our results are an important step towards the development of photon-photon quantum logic gates.",

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doi = "10.1103/PhysRevLett.126.140501",

language = "英语",

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T1 - Heralded Nondestructive Quantum Entangling Gate with Single-Photon Sources

AU - Li, Jin Peng

AU - Gu, Xuemei

AU - Qin, Jian

AU - Wu, Dian

AU - You, Xiang

AU - Wang, Hui

AU - Schneider, Christian

AU - Höfling, Sven

AU - Huo, Yong Heng

AU - Lu, Chao Yang

AU - Liu, Nai Le

AU - Li, Li

AU - Pan, Jian Wei

PY - 2021/4/5

Y1 - 2021/4/5

N2 - 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 micropillar 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±1.2)%. As an application, we generated event-ready Bell states with a fidelity of (83.4±2.4)%. Our results are an important step towards the development of photon-photon quantum logic gates.

AB - 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 micropillar 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±1.2)%. As an application, we generated event-ready Bell states with a fidelity of (83.4±2.4)%. Our results are an important step towards the development of photon-photon quantum logic gates.

UR - https://www.scopus.com/pages/publications/85104480186

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DO - 10.1103/PhysRevLett.126.140501

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JO - Physical Review Letters

JF - Physical Review Letters

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ER -

Heralded Nondestructive Quantum Entangling Gate with Single-Photon Sources

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