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

• URL: http://arxiv.org/abs/2009.00746v3
• Date: Thu, 10 Dec 2020 20:12:05 GMT
• Title: Single-photon switch controlled by a qubit embedded in an engineered electromagnetic environment
• Authors: Eugene Stolyarov
• Abstract summary: 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. We discuss the possible implementation of the considered single-photon switch on the microwave circuit QED architecture.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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