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

2020/09/30 by E. V. Stolyarov, Eugene Stolyarov · 18 citations
Computer Science · Engineering · Mathematics · Physics and Astronomy · #Circuit quantum electrodynamics #Electrical engineering #Engineering #Mathematics #Microwave #Optoelectronics #Photon #Photonic and Optical Devices #Physics #Quantum #Quantum Information and Cryptography #Quantum mechanics #Quantum optics and atomic interactions #Qubit #Qutrit #Realization (probability) #Resonator #Topology (electrical circuits) #quant-ph

paper · pdf · doi:10.1103/physreva.102.063709

published in Physical Review A 102(6) (American Physical Society) · 14 pages, 8 figures

arxiv created 2020/12/10 · openalex publication_date 2020/12/10 · arxiv updated 2020/12/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

A single-photon switch is an important element for the building of scalable quantum networks. In this 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 band gap on a qubit transition frequency. We discuss the possible implementation of the considered single-photon 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.

Citations

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