Nonreciprocal single-photon quantum router

Ren, Ya-long; Ma, Shengli; Xie, Ji-kun; Li, Xinke; Cao, Mingtao; Li, Fuli

doi:10.1103/physreva.105.013711

Cited by 43 publications

(12 citation statements)

References 100 publications

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“…Many theoretical schemes have been proposed to realize singlephoton ONRs 22,[33][34][35][36][37][38] . Nonetheless, to date, only one experimental realization of an ONR with genuine single photons in ladder-type electromagnetically induced transparency 39 has been reported.…”

mentioning

confidence: 99%

Noiseless single-photon isolator at room temperature

et al. 2023

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Nonreciprocal devices, such as isolators, are of great importance for optical communication and optical information processing. To bypass the limitation of a strong magnetic field imposed by the traditional Faraday magneto-optic effect, many alternative mechanisms have been proposed to demonstrate magnetic-free nonreciprocity. However, limited by the drive-induced noise, the noiseless isolator capable of working in the quantum regime has yet to be realized in the experiment. Here, we show a noiseless all-optical isolator with genuine single photons in hot atoms. We experimentally study this mechanism using an open V-type level scheme and demonstrate a low insertion loss of 0.6 dB and high isolation of 30.3 dB with bandwidth up to hundreds of megahertz. Furthermore, the nonreciprocal direction can be truly reversed only by tuning the frequency of the pump laser with the same setup. Our scheme relies on widely used optical technology and is thus universal and robust.

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confidence: 99%

Noiseless single-photon isolator at room temperature

et al. 2023

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“…Extending the ideas of controlling the reflection and transmission of a photon by an atom in an array, quantum routers [357][358][359][360][361][362][363][364][365][366][367][368][369][370] are proposed by coupling two different cavity arrays in X-shape [371], T -shape [372][373][374], T -bulge-shape [375,376], Π-shape [377], etc. Routing of photons allows to connect several quantum nodes to build a quantum network.…”

Section: B Controllable Photon Transfermentioning

confidence: 99%

Quantum information processing in cavities: A review

Meher,

Sivakumar

2022

Preprint

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Processing of information and computation undergoing a paradigmatic shift since the realization of the enormous potential of quantum features to perform these tasks. Coupled cavity array is one of the well-studied systems to carry out these tasks. It is a versatile platform to build quantum networks for distributed information processing and communication. Cavities have the salient feature of retaining photons for longer, thereby enabling them to travel coherently through the array without losing them in dissipation. Several research groups have successfully demonstrated the coupling of cavities and implemented various quantum information protocols. These advancements pave the way for implementing cavity arrays for large scale quantum communications and computations. This article reviews theoretical proposals and discusses a few pertinent experimental realizations of quantum information tasks in cavities.

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“…Recently, there have been growing interests and algorithmic developments for quantum routers [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23]. Several schemes use light-matter interaction in order to achieve quantum routing.…”

Section: Introductionmentioning

confidence: 99%

Demonstration of a photonic router via quantum walks

Gao

Wang

et al. 2023

New J. Phys.

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Motivated by the need for quantum computers to communicate between multiple, well separated qubits, we introduce the task of routing the quantum state from one input mode to a superposition of several output modes coherently. We report an experimental demonstration of a deterministic photonic routing protocol applied to an entangled state. We show in a quantum walk architecture, quantum networks perfectly route entangled states from an initial input mode to an arbitrary output mode coherently and deterministically. Our results demonstrate the key principle of a perfect router, opening a route toward data routing and transferring for quantum computing systems. Our work paves the way for effective design of efficient routing protocols on practical quantum networks.

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Nonreciprocal single-photon quantum router

Cited by 43 publications

References 100 publications

Noiseless single-photon isolator at room temperature

Noiseless single-photon isolator at room temperature

Quantum information processing in cavities: A review

Demonstration of a photonic router via quantum walks

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