Single-photon nonreciprocal transport in one-dimensional coupled-resonator waveguides

Xu, Xun-Wei; Chen, Ai-Xi; Li, Yong; Liu, Yuxi

doi:10.1103/physreva.95.063808

Cited by 42 publications

(17 citation statements)

References 108 publications

(134 reference statements)

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“…The efficiency for nonreciprocity transport can be described by the the scattering flow [53][54][55][56] I l ′ l for a single photon from CRW-l to CRW-l ′ (l = a, b). The detailed calculations of the scattering flow I l ′ l can be found in the supplementary material [38].…”

mentioning

confidence: 99%

Nonreciprocal transition between two nondegenerate energy levels

Xu,

Zhao,

Wang

et al. 2019

Preprint

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Stimulated emission and absorption are two fundamental processes of light-matter interaction, and the coefficients of the two processes should be equal in general. However, we will describe a generic method to realize significant difference between the stimulated emission and absorption coefficients of two nondegenerate energy levels, which we refer to as nonreciprocal transition. As a simple implementation, a cyclic three-level atom system, comprising two nondegenerate energy levels and one auxiliary energy level, is employed to show nonreciprocal transition via a combination of synthetic magnetism and reservoir engineering. Moreover, a single-photon nonreciprocal transporter is proposed using two one dimensional semi-infinite coupled-resonator waveguides connected by an atom with nonreciprocal transition effect. Our work opens up a route to design atom-mediated nonreciprocal devices in a wide range of physical systems.

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confidence: 99%

Nonreciprocal transition between two nondegenerate energy levels

Xu,

Zhao,

Wang

et al. 2019

Preprint

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“…Also, the bosonic modes can be represented by optical resonator waveguides as in Ref. [60], where how to create artificial magnetic flux has also been discussed. And thus the generalization to optical system is also feasible.…”

Section: Discussionmentioning

confidence: 99%

Tunable quantum switcher and router of single atoms using localized artificial magnetic fields

Zhao

Tan

et al. 2020

Phys. Rev. Research

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We propose to generate localized artificial magnetic fields using two thin Raman laser beams intersected at a narrow region of a two-leg ladder, where the frequency difference must approximately match the energy offset between the two legs. Based on this method, we investigate the single-atom transport in a two-leg ladder with only two rungs, which, together with the legs, enclose a localized artificial magnetic flux. Here, the atoms on the two legs (channels) possess different onsite energies that produce another energy offset. We find that the atom incoming from the left channel can experience from blockade to transparency via modifying the onsite energy, tunneling strength, or magnetic flux, which can be potentially used for a quantum switcher. Furthermore, the atom incoming from the left channel can also be perfectly routed into the right leg, when, intriguingly, the outgoing atom in the right channel possesses a quasimomentum that can be modulated by the magnetic flux. The result may be potentially used for the interface that controls the communication between two individual quantum devices of cold atoms. The method can also be generalized to other artificial quantum systems, such as superconducting quantum circuit systems, optical systems, etc.

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“…tions of the quantum channels, which play an important role in single-photon frequency conversion. Also unlike the previous studies on single-photon nonreciprocity in 1D CRWs [59][60][61], in this work, the frequencies of the CRWs are very different and they can not be coupled together directly. The addition of optomechanical systems (or mechanical modes) to the frequency converter offers the possibility to enable nonreciprocal frequency transduction between two CRWs with distinctively different frequencies and allows for dynamic control of the direction of frequency conversion by tuning the phases of external driving lasers.…”

Section: Introductionmentioning

confidence: 86%

Nonreciprocal single-photon frequency converter via multiple semi-infinite coupled-resonator waveguides

Chen

et al. 2017

Phys. Rev. A

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We propose to construct a nonreciprocal single-photon frequency converter via multiple semi-infinite coupled-resonator waveguides (CRWs). We first demonstrate that the frequency of a single photon can be converted nonreciprocally through two CRWs, which are coupled indirectly by optomechanical interactions with two nondegenerate mechanical modes. Based on such nonreciprocity, two different single-photon circulators are proposed in the T-shaped waveguides consisting of three semi-infinite CRWs, which are coupled in pairwise by optomechanical interactions. One circulator is proposed by using two nondegenerate mechanical modes and the other one is proposed by using three nondegenerate mechanical modes. Nonreciprocal single-photon frequency conversion is induced by breaking the time-reversal symmetry, and the optimal conditions for nonreciprocal frequency conversion are obtained. These proposals can be used to realize nonreciprocal frequency conversion of single photons in any two distinctive waveguides with different frequencies and they can allow for dynamic control of the direction of frequency conversion by tuning the phases of external driving lasers, which may have versatile applications in hybrid quantum networks.

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Single-photon nonreciprocal transport in one-dimensional coupled-resonator waveguides

Cited by 42 publications

References 108 publications

Nonreciprocal transition between two nondegenerate energy levels

Nonreciprocal transition between two nondegenerate energy levels

Tunable quantum switcher and router of single atoms using localized artificial magnetic fields

Nonreciprocal single-photon frequency converter via multiple semi-infinite coupled-resonator waveguides

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