All-Optical Entanglement Swapping

Liu, Shengshuai; Lou, Yanbo; Chen, Yingxuan; Jing, Jietai

doi:10.1103/physrevlett.128.060503

Cited by 32 publications

(13 citation statements)

References 35 publications

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“…Overall, hot atomic vapors, by their experimental simplicity and availability, will certainly play a major role in the coming years for the implementation of long distance quantum networks and the quantum internet [170]. For example, two recent experiments have shown the importance of hot atomic vapor for multiplexed all-optical quantum teleportation [171], and all-optical entanglement swapping [172].…”

Section: Discussionmentioning

confidence: 99%

Hot atomic vapors for nonlinear and quantum optics

et al. 2023

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Nonlinear optics has been a very dynamic field of research with spectacular phenomena discovered mainly after the invention of lasers. The combination of high intensity fields with resonant systems has further enhanced the nonlinearity with specific additional effects related to the resonances. In this paper we review a limited range of these effects which has been studied in the past decades using close-to-room-temperature atomic vapors as the nonlinear resonant medium. In particular we describe four-wave mixing (4WM) and generation of nonclassical light in atomic vapors. One-and two-mode squeezing as well as photon correlations are discussed. Furthermore, we present some applications for optical and quantum memories based on hot atomic vapors. Finally, we present results on the recently developed field of quantum fluids of light using hot atomic vapors.

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Section: Discussionmentioning

confidence: 99%

Hot atomic vapors for nonlinear and quantum optics

et al. 2023

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“…In the CV regime, Bell-state measurement based on optic-electro and electro-optic conversion is needed to realize entanglement swapping, which greatly limits the application of entanglement swapping in constructing broadband quantum networks. To address this issue, Liu et al proposed and experimentally realized an all-optical entanglement swapping (AOES) protocol without measurement [212] . In this protocol, the low-noise OPA based on the FWM process [72,102,199,213] is utilized to amplify the input state with high gain, avoiding the use of optic-electro and electro-optic conversion.…”

Section: All-optical Entanglement Swappingmentioning

confidence: 99%

“…(c), (e) are similar to (a) and (d), (f) are similar to (b) except that the states are EPR 1 and EPR 2 . Adapted from [212].…”

Section: Applications In Quantum Information Protocolsmentioning

confidence: 99%

Optical quantum states based on hot atomic ensembles and their applications

et al. 2022

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.The four-wave mixing process in atomic ensembles has many important applications in quantum information. We review recent progress on the generation of optical quantum states from the four-wave mixing process in hot atomic ensembles, including the production of two-beam, multi-beam, and multiplexed quantum correlated or entangled states. We also review the applications of these optical quantum states in implementing quantum information protocols, constructing SU(1,1) quantum interferometers, and realizing quantum plasmonic sensing. These applications indicate that the four-wave mixing process in hot atomic ensembles is a promising platform for quantum information processing, especially for implementing all-optical quantum information protocols, constructing SU(1,1) interferometers, and realizing quantum sensing.

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“…The CV system has the advantage of deterministic implementation 3 . With the development of quantum technology, a series of quantum information protocols based on DV and CV systems have been developed, including quantum key distribution, 4 , 5 quantum teleportation, 6 – 14 entanglement swapping, 15 – 21 quantum dense coding, 22 – 27 quantum cloning, 28 – 32 and so on.…”

Section: Introductionmentioning

confidence: 99%

Deterministic all-optical quantum state sharing

et al. 2023

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.Quantum state sharing, an important protocol in quantum information, can enable secure state distribution and reconstruction when part of the information is lost. In (k, n) threshold quantum state sharing, the secret state is encoded into n shares and then distributed to n players. The secret state can be reconstructed by any k players (k > n / 2), while the rest of the players get nothing. In the continuous variable regime, the implementation of quantum state sharing needs the feedforward technique, which involves optic-electro and electro-optic conversions. These conversions limit the bandwidth of the quantum state sharing. Here, to avoid the optic-electro and electro-optic conversions, we experimentally demonstrate (2, 3) threshold deterministic all-optical quantum state sharing. A low-noise phase-insensitive amplifier based on the four-wave mixing process is utilized to replace the feedforward technique. We experimentally demonstrate that any two of three players can cooperate to implement the reconstruction of the secret state, while the rest of the players cannot get any information. Our results provide an all-optical platform to implement arbitrary (k, n) threshold deterministic all-optical quantum state sharing and pave the way to construct the all-optical broadband quantum network.

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All-Optical Entanglement Swapping

Cited by 32 publications

References 35 publications

Hot atomic vapors for nonlinear and quantum optics

Hot atomic vapors for nonlinear and quantum optics

Optical quantum states based on hot atomic ensembles and their applications

Deterministic all-optical quantum state sharing

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