Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Physical Review A

Designable single-photon quantum routings with atomic mirrors

Xingmin Li, L. F. Wei

Published Dec 21, 2015• 64 citations
Publisher

Abstract

Quantum routers are the necessary elements of the quantum information network, and thus their routing capabilities are particularly important. With the atomic mirrors robustly controlling the reflected or transmitted coefficient of the waveguide photon, we show that a two-level atom can be served as an ideal quantum router to redirect a single photon from the input waveguide into the output waveguides (OWGs) with designable probabilities, e.g., $100%$ for one OWG, $1/2$ to one of the two OWGs, and $1/3$ to one of the three OWGs, etc.. The influence of the atomic dissipations on the routing capability is also discussed.

DOI
10.1103/physreva.92.063836

Related papers

Targeted photonic routers with chiral photon-atom interactions

Cong-Hua Yan, Yong Li, Haidong Yuan +1 more

The photonic router is a key device in optical quantum networks. Conventional routers, however, can only transfer a photon from the input port to the desired port probabilistically. Here, we propose to use chiral photon-atom interactions for targeted routing that can transfer a single photon from the input port to an arbitrarily selected output port deterministically, i.e., with $100%$ probability. The configuration of the proposed router consists of a driven three-level atom which is chirally coupled to two photonic waveguides simultaneously. It is shown that, by properly adjusting the driving field on the atom, a single photon inputting from one port of the first waveguide can be deterministically transferred to one of the selected output ports of the second waveguide. Both resonant and nonresonant photons can be deterministically routed to the desired ports. We also examine how the routing fidelity is influenced by dissipations and imperfections, and investigate the transmission characters of two resonant photons.

Physical Review A•Feb 13, 2018•98 citations

Tunable single-photon quantum router

M. Ahumada, P. A. Orellana, Francisco Domínguez-Adame +1 more

We propose an efficient single-photon router comprising two resonator waveguide channels coupled by several sequential cavities with embedded three-level atoms. We show that the system can operate as a perfect four-way single-photon switch. We also demonstrate that an incident single photon propagating in one of the waveguides can be routed into one or the other output channels; such routing can be controlled by the external classical electromagnetic field driving the atoms. We argue that, under appropriate conditions, the efficiency of such routing can be close to 100% within a broad operational bandwidth, suggesting various applications in photonics.

arXiv:1901.08916•Physical Review A•Mar 14, 2019•56 citations

Dynamic modulated single-photon routing

Hao-Zhen 浩珍 Li 李, Ran Zeng, Miao 淼 Hu 胡 +5 more

The dynamic control of single-photon scattering in a pair of one-dimensional waveguides mediated by a time-modulated atom–cavity system is investigated. Two cases, where the waveguides are coupled symmetrically or asymmetrically to the atom–cavity system, are discussed in detail. The results show that such time-modulated atom–cavity configuration can behave as a dynamical tunable directional single-photon router. The photons with different frequencies can dynamically be routed from the incident waveguide into any ports of the other with a 100% probability via adjusting the modulated amplitude or phases of the time-modulated atom–cavity coupling strengths, associate with the help of the asymmetrical waveguide–cavity couplings. Furthermore, the influence of dissipation on the routing capability is investigated. It is shown that the present single-photon router is robust against the dissipative process of the system, especially the atomic dissipation. These results are expected to be applicable in quantum information processing and design quantum devices with dynamical modulation.

Chinese Physics B•Sep 4, 2023•2 citations

Control of single-photon routing by another atom

J. C. Huang, Jingwen Wang, Yan Wang +1 more

Abstract Quantum routers with a routing rate of much more than 0.5 are important for quantum networks. Here we provide a scheme to significantly improve quantum routing performance. The proposal extends a recent scheme proposed by Zhou et al 2013 ( Phys. Rev. Lett. 111 103604) by locating another atom in the input channel to generate an effective reflection potential. Our numerical results show that the routing capability from the input channel to another channel can be remarkably enhanced, and even in the presence of moderately low cavity loss, the maximum transfer rate from one channel to another can be more than 0.9. Moreover, we find that there exists an optimum waveguide length to achieve the maximum transfer rate. Our scheme could feasibly be implemented experimentally for quantum routing with a high transfer rate.

Journal of Physics B Atomic Molecular and Optical Physics•Nov 14, 2017•9 citations

Single photon transport in two waveguides chirally coupled by a quantum emitter

Mu-Tian Cheng, Xiao-San Ma, Jiayan Zhang +1 more

We investigate single photon transport in two waveguides coupled to a two-level quantum emitter (QE). With the deduced analytical scattering amplitudes, we show that under condition of the chiral coupling between the QE and the photon in the two waveguides, the QE can play the role of ideal quantum router to redirect a single photon incident from one waveguide into the other waveguide with a probability of 100% in the ideal condition. The influences of cross coupling between two waveguides and dissipations on the routing are also shown.

Optics Express•Aug 19, 2016•62 citations

Tunable targeted single-photon routing in a waveguide-QED structure containing a time-modulated two-level atom

杨兰 YANG Lan, Haozhen Li, Ran Zeng +5 more

Single-photon routing between two one-dimensional waveguides mediated by a single-mode cavity embedded with a time-modulated two-level atom is investigated. Two configurations, where the single photon is incident from an infinite or semi-infinite waveguide, are considered. Using the analytical expressions of the single-photon scattering amplitudes, the transmission behaviors in the two waveguides are discussed. The results show that the time modulation of the atomic frequency enables a dynamically tunable quantum router. A single photon with different frequencies can be routed dynamically from the incident waveguide to the other by properly manipulating the amplitude-to-frequency ratio of the atom. The routing efficiency can be improved to approach 100% by terminating the incident waveguide. In the semi-waveguide configuration, the routing behaviors controlled by the quantum coherent feedback are also investigated. The influence of the phase shifts introduced by the terminated waveguide on the routing capability and the conditions for perfect single-photon routing are discussed in detail. A frequency tunable targeted single-photon router can even be realized with the help of chiral coupling. These results may be beneficial to the photon control in a quantum network based on time-modulated quantum nodes.

Journal of the Optical Society of America B•May 13, 2024•1 citation
Quantum routers are the necessary elements of the quantum information network, and thus their routing capabilities are particularly important. With the atomic mirrors robustly controlling the reflected or transmitted coefficient of the waveguide photon, we show that a two-level atom can be served as an ideal quantum router to redirect a single photon from the input waveguide into the output waveguides (OWGs) with designable probabilities, e.g., 100100%100 for one OWG, 1/21/21/2 to one of the two OWGs, and 1/31/31/3 to one of the three OWGs, etc.. The influence of the atomic dissipations on the routing capability is also discussed.
The photonic router is a key device in optical quantum networks. Conventional routers, however, can only transfer a photon from the input port to the desired port probabilistically. Here, we propose to use chiral photon-atom interactions for targeted routing that can transfer a single photon from the input port to an arbitrarily selected output port deterministically, i.e., with 100100%100 probability. The configuration of the proposed router consists of a driven three-level atom which is chirally coupled to two photonic waveguides simultaneously. It is shown that, by properly adjusting the driving field on the atom, a single photon inputting from one port of the first waveguide can be deterministically transferred to one of the selected output ports of the second waveguide. Both resonant and nonresonant photons can be deterministically routed to the desired ports. We also examine how the routing fidelity is influenced by dissipations and imperfections, and investigate the transmission characters of two resonant photons.
We propose an efficient single-photon router comprising two resonator waveguide channels coupled by several sequential cavities with embedded three-level atoms. We show that the system can operate as a perfect four-way single-photon switch. We also demonstrate that an incident single photon propagating in one of the waveguides can be routed into one or the other output channels; such routing can be controlled by the external classical electromagnetic field driving the atoms. We argue that, under appropriate conditions, the efficiency of such routing can be close to 100% within a broad operational bandwidth, suggesting various applications in photonics.
The dynamic control of single-photon scattering in a pair of one-dimensional waveguides mediated by a time-modulated atom–cavity system is investigated. Two cases, where the waveguides are coupled symmetrically or asymmetrically to the atom–cavity system, are discussed in detail. The results show that such time-modulated atom–cavity configuration can behave as a dynamical tunable directional single-photon router. The photons with different frequencies can dynamically be routed from the incident waveguide into any ports of the other with a 100% probability via adjusting the modulated amplitude or phases of the time-modulated atom–cavity coupling strengths, associate with the help of the asymmetrical waveguide–cavity couplings. Furthermore, the influence of dissipation on the routing capability is investigated. It is shown that the present single-photon router is robust against the dissipative process of the system, especially the atomic dissipation. These results are expected to be applicable in quantum information processing and design quantum devices with dynamical modulation.
Abstract Quantum routers with a routing rate of much more than 0.5 are important for quantum networks. Here we provide a scheme to significantly improve quantum routing performance. The proposal extends a recent scheme proposed by Zhou et al 2013 ( Phys. Rev. Lett. 111 103604) by locating another atom in the input channel to generate an effective reflection potential. Our numerical results show that the routing capability from the input channel to another channel can be remarkably enhanced, and even in the presence of moderately low cavity loss, the maximum transfer rate from one channel to another can be more than 0.9. Moreover, we find that there exists an optimum waveguide length to achieve the maximum transfer rate. Our scheme could feasibly be implemented experimentally for quantum routing with a high transfer rate.
We investigate single photon transport in two waveguides coupled to a two-level quantum emitter (QE). With the deduced analytical scattering amplitudes, we show that under condition of the chiral coupling between the QE and the photon in the two waveguides, the QE can play the role of ideal quantum router to redirect a single photon incident from one waveguide into the other waveguide with a probability of 100% in the ideal condition. The influences of cross coupling between two waveguides and dissipations on the routing are also shown.
Single-photon routing between two one-dimensional waveguides mediated by a single-mode cavity embedded with a time-modulated two-level atom is investigated. Two configurations, where the single photon is incident from an infinite or semi-infinite waveguide, are considered. Using the analytical expressions of the single-photon scattering amplitudes, the transmission behaviors in the two waveguides are discussed. The results show that the time modulation of the atomic frequency enables a dynamically tunable quantum router. A single photon with different frequencies can be routed dynamically from the incident waveguide to the other by properly manipulating the amplitude-to-frequency ratio of the atom. The routing efficiency can be improved to approach 100% by terminating the incident waveguide. In the semi-waveguide configuration, the routing behaviors controlled by the quantum coherent feedback are also investigated. The influence of the phase shifts introduced by the terminated waveguide on the routing capability and the conditions for perfect single-photon routing are discussed in detail. A frequency tunable targeted single-photon router can even be realized with the help of chiral coupling. These results may be beneficial to the photon control in a quantum network based on time-modulated quantum nodes.