Phase-modulated single-photon router

Yang, Dinghua; Cheng, Mu-Tian; Ma, Xingxiao; Xu, Jingping; Zhu, Chengjie; Huang, Xiao Ming

doi:10.1103/physreva.98.063809

Cited by 39 publications

(19 citation statements)

References 76 publications

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“…Quantum nodes, which generate, process and store quantum information, are connected by long-distance quantum channels, while quantum repeaters establish and distribute entanglement. As one kind of node devices, quantum routers [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] are a key component of quantum network, which can transmit information continuously between remote quantum nodes. Photons play significant roles in the construction of quantum router because they are relatively free of the decoherence [23,24]that plagues other quantum systems, and can be manipulated and detected easily.…”

Section: Introductionmentioning

confidence: 99%

Realization of Tunable Highly-Efficient Quantum Routing in Chiral Waveguides

Yan

Lü

2022

Front. Phys.

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The chiral interaction between single photons in waveguides and quantum emitters has gained considerable attention. Here, we proposed a tunable quantum routing scheme with a chiral quantum system by coupling an emitter to two chiral waveguides. Conventional quantum routers can only be achieved with each port output probability no larger than 25%. But our scheme can transfer quantum information arbitrarily from an input port to another, and each port’s output probability is 100%. Besides, we investigated the influence of the Purcell factor in quantum routing properties. No matter how to change the size of the directionalities Sj or set a specific value to the dissipation of the emitter, we always found that the quantum routing has very high efficiency. Moreover, we also used a superconducting qubit coupled to two resonators to show the present scheme is pretty feasible for experimental implementation.

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Section: Introductionmentioning

confidence: 99%

Realization of Tunable Highly-Efficient Quantum Routing in Chiral Waveguides

Yan

Lü

2022

Front. Phys.

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“…Waveguide QED architectures are particularly appealing in this regard as these structures can be used to perform several quantum information tasks in a single setup [15] including the photon routing [16][17][18]. Closely akin to waveguide QED is the burgeoning development of chiral quantum optical systems [19].…”

Section: Introductionmentioning

confidence: 99%

Collective photon routing improvement in a dissipative quantum emitter chain strongly coupled to a chiral waveguide QED ladder

Poudyal,

Mirza

2020

Preprint

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We examine the routing scheme of single photons in a one-dimensional periodic chain of twolevel quantum emitters (QEs) strongly coupled to two waveguides in a ladder configuration. It is known that for a single-emitter chiral waveguide ladder setting, photons can be redirected from one waveguide to another with a 100% probability (deterministically) provided the resonance condition is met and spontaneous emission is completely ignored. However, when the spontaneous emission is included the routing scheme becomes considerably imperfect. In this paper, we present a solution to this issue by considering a chain of QEs where in addition to the waveguide mediated interaction among emitters, a direct and infinitely long-ranged dipole-dipole interaction (DDI) is taken into account. We show that the collective effects arising from the strong DDI protect the routing scheme from spontaneous emission loss. In particular, we demonstrate that the router operation can be improved from 58% to ∼95% in a typical dissipative chiral light-matter interface consisting of nanowires modes strongly interacting with a linear chain of 30 quantum dots. With the recent experimental progress in chiral quantum optics, trapped QEs evanescently coupled to tapered nanofibers can serve as a platform for the experimental realization of this work.

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“…It was demonstrated that an individual quantum emitter embedded in a one-dimensional waveguide can act as a tunable scatterer for an incident photon [30]. * eugenestolyarov@gmail.com By varying the strength [6,31,32] and phase [33,34] of light-emitter coupling or utilizing a control field (classical [4, 10-12, 14, 15] or quantum [35,36]), one can achieve either complete transmission or reflection of an incident (probe) photon. This feature is used for the implementation of optical switches and routers [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Single-photon switch controlled by a qubit embedded in an engineered electromagnetic environment

Stolyarov

2020

Preprint

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A single-photon switch is an important element for the building of scalable quantum networks. In the paper, we propose a feasible scheme for efficient single-photon switching. The proposed switch is controlled by a state of a qubit formed by the pair of the lowest levels of a three-level system (qutrit) coupled to a resonator. This resonator-qutrit system comprises a switching unit of the considered setup. For suppression of the Purcell relaxation of the control qubit, the switching unit is embedded into a coupled-resonator array serving as an engineered electromagnetic environment with a bandgap on a qubit transition frequency. We discuss the possible implementation of the considered singlephoton switch on the microwave circuit QED architecture. We demonstrate that high switching contrasts can be attained for the parameters achievable for the state-of-the-art superconducting circuit QED setups.

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Phase-modulated single-photon router

Cited by 39 publications

References 76 publications

Realization of Tunable Highly-Efficient Quantum Routing in Chiral Waveguides

Realization of Tunable Highly-Efficient Quantum Routing in Chiral Waveguides

Collective photon routing improvement in a dissipative quantum emitter chain strongly coupled to a chiral waveguide QED ladder

Single-photon switch controlled by a qubit embedded in an engineered electromagnetic environment

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