Active controlled dual-band unidirectional reflectionlessness by classical driving field in non-Hermitian quantum system

Yang, Hangzhou; Qiu, De Xiu; Zou, Xin Yu; An, Chengshou; Zhang, Ying Qiao; Jin, Xing Ri

doi:10.1088/2058-9565/abb4a7

Cited by 7 publications

(3 citation statements)

References 31 publications

(32 reference statements)

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“…)(e iφ 0 +iθ 1 + e i(2φ+φ 0 )+iθ 1 ) 6(a), one can find that the nonreciprocal transport of single photon remain can be achieved in this case and the non-reciprocity is strong (I m1 → 1). More importantly, the transmission spectrum is no longer independent of the phase φ 0 of the driving field from equation (17). Thus we discuss the influence of the phases φ 0 and θ 1 on the nonreciprocal transport of single photon in figures 6(b)-(g).…”

Section: Phase-modulated Single-photon Nonreciprocal Transportmentioning

confidence: 99%

Phase-modulated single-photon nonreciprocal transport and directional router in a waveguide–cavity–emitter system beyond the chiral coupling

Wang¹,

Yang²,

Chen³

et al. 2022

Quantum Sci. Technol.

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We propose a potentially practical scheme for the controllable single-photon transport via waveguides which are coupled to a microcavity-emitter system. The microcavity-emitter system consists of a V-type three-level emitter and two or one single-mode microcavity. A driving ﬁeld is used to drive a hyperﬁne transition between two upper excited states of the V-type three-level emitter. Beyond chiral coupling between waveguides and microcavity-emitter system, we show that the perfectly nonreciprocal single-photon transport in a single waveguide and the single-photon router with 100% routing probability in two waveguides can be achieved. Interesting enough, whether the nonreciprocal single-photon transport or the single-photon router can be switched periodically by adjusting the phase associated with microcavity-emitter coupling strength and the driving ﬁeld. The complete physical explanation of the underlying mechanism is presented.

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Section: Phase-modulated Single-photon Nonreciprocal Transportmentioning

confidence: 99%

Phase-modulated single-photon nonreciprocal transport and directional router in a waveguide–cavity–emitter system beyond the chiral coupling

Wang¹,

Yang²,

Chen³

et al. 2022

Quantum Sci. Technol.

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“…[35] In 2022, Zhou et al have studied nonreciprocal optical transmission in a spinning resonator system coupled to an atomic ensemble. [40] The aforementioned investigations mainly focused on transmission characteristics, whereas optical devices based on the mechanism of unidirectional reflectionlessness (UR) [41][42][43] can not only protect upper stage optical devices from reflected light in the cascade circuit to improve system stability, but also convey information, similar to transmission. Up to now, UR has demonstrated the significant potential applications in sensors, diodes, isolators, filters, and so on, and thus research on UR continues to grow.…”

Section: Introductionmentioning

confidence: 99%

Unidirectional Reflectionlessness and Transmissionlessness in Indirectly Coupled Whispering‐Gallery Mode Resonators

Li,

Zhang,

Jin

2024

Annalen der Physik

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The reflection and transmission characteristics of a system composed of two whispering‐gallery mode (WGM) resonators are explored. Each resonator contains a Zeeman split quantum dot and side‐couples to an optical fiber. The results indicate that the unidirectional reflectionlessness and transmissionlessness can be achieved by adjusting the coupling strength between the resonators and the optical fiber, as well as the transition rate between the counter‐propagating modes within the WGM resonators. Besides, a one‐to‐one correspondence is set up between the resonance frequencies of quantum dots' energy levels and the positions of reflectionlessness (transmissionlessness) peaks when phase shift between two WGM resonators is π. This research provides the valuable insights for the development of quantum optical devices such as isolators, circulators, and routers.

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“…In recent years, due to its potential applications in quantum information [1][2][3][4][5][6] processing and quantum networks [7][8][9][10][11], the research on controlling single photon transport through waveguide coupled to quantum emitters is very popular [12][13][14][15][16][17][18][19][20][21][22][23][24]. The waveguide can be used as a quantum channel, and the quantum emitter can be placed in the cavity to form a quantum node, which provides a platform for quantum information and quantum computing.…”

Section: Introductionmentioning

confidence: 99%

Directional router and controllable non-reciprocity transmission based on phase and pathway coherence

Yang,

Tan,

Liu

2023

Phys. Scr.

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A multi-channel quantum router with four nodal cavities is constructed by two coupled-resonator waveguides and four single cavities. We can achieve directional routing by adjusting the probability of photon exiting from the specified port to close to 100% based on multiple pathways between the photon from the incident port to the outgoing port in this hybrid system. Under the effect of phase difference between two classical light fields, the mutual interference between different pathways can be adjusted to destructive interference or constructive interference, which lays the foundation for the increase and decrease of the routing probability. The influence of different parameter values on single photon routing probability is also studied. By studying the analytic formula of probability amplitude, we get the physical mechanism of exiting ports being closed under certain parameter conditions and the phase relationship between the backward transmission and the original direction transmission of photons. Furthermore the non-reciprocal transmission and directional routing beyond chiral coupling can also be realized, which provides new possibilities for the study of quantum routers and new insights for the study of photon transmission characteristics.

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Active controlled dual-band unidirectional reflectionlessness by classical driving field in non-Hermitian quantum system

Cited by 7 publications

References 31 publications

Phase-modulated single-photon nonreciprocal transport and directional router in a waveguide–cavity–emitter system beyond the chiral coupling

Phase-modulated single-photon nonreciprocal transport and directional router in a waveguide–cavity–emitter system beyond the chiral coupling

Unidirectional Reflectionlessness and Transmissionlessness in Indirectly Coupled Whispering‐Gallery Mode Resonators

Directional router and controllable non-reciprocity transmission based on phase and pathway coherence

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