Quantum controlled-phase-flip gate between a flying optical photon and a Rydberg atomic ensemble

Y. M. Hao; G. W. Lin; Keyu Xia; X. M. Lin; Y. P. Niu; S. Q. Gong

doi:10.1038/srep10005

Quantum controlled-phase-flip gate between a flying optical photon and a Rydberg atomic ensemble

Y. M. Hao, G. W. Lin^*, Keyu Xia, X. M. Lin, Y. P. Niu, S. Q. Gong

^*Corresponding author for this work

Macquarie University Research Centre in Quantum Science and Technology

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

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Abstract

Quantum controlled-phase-flip (CPF) gate between a flying photon qubit and a stationary atomic qubit could allow the linking of distant computational nodes in a quantum network. Here we present a scheme to realize quantum CPF gate between a flying optical photon and an atomic ensemble based on cavity input-output process and Rydberg blockade. When a flying single-photon pulse is reflected off the cavity containing a Rydberg atomic ensemble, the dark resonance and Rydberg blockade induce a conditional phase shift π for the photon pulse, thus we can achieve the CPF gate between the photon and the atomic ensemble. Assisted by Rydberg blockade interaction, our scheme works in the N-atoms strong-coupling regime and significantly relaxes the requirement of strong coupling of single atom to photon in the optical cavity.

Original language	English
Article number	10005
Pages (from-to)	1-7
Number of pages	7
Journal	Scientific Reports
Volume	5
DOIs	https://doi.org/10.1038/srep10005
Publication status	Published - 12 May 2015

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abstract = "Quantum controlled-phase-flip (CPF) gate between a flying photon qubit and a stationary atomic qubit could allow the linking of distant computational nodes in a quantum network. Here we present a scheme to realize quantum CPF gate between a flying optical photon and an atomic ensemble based on cavity input-output process and Rydberg blockade. When a flying single-photon pulse is reflected off the cavity containing a Rydberg atomic ensemble, the dark resonance and Rydberg blockade induce a conditional phase shift π for the photon pulse, thus we can achieve the CPF gate between the photon and the atomic ensemble. Assisted by Rydberg blockade interaction, our scheme works in the N-atoms strong-coupling regime and significantly relaxes the requirement of strong coupling of single atom to photon in the optical cavity.",

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AU - Niu, Y. P.

AU - Gong, S. Q.

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Quantum controlled-phase-flip gate between a flying optical photon and a Rydberg atomic ensemble

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