Microwave single-photon detection using a hybrid spin-optomechanical quantum interface

• URL: http://arxiv.org/abs/2401.10455v1
• Date: Fri, 19 Jan 2024 02:00:38 GMT
• Title: Microwave single-photon detection using a hybrid spin-optomechanical quantum interface
• Authors: Pratyush Anand, Ethan G. Arnault, Matthew E. Trusheim, and Dirk R. Englund
• Abstract summary: We propose a hybrid spin-optomechanical interface to detect single microwave photons. The microwave photons are coupled to a phononic resonator via piezoelectric actuation.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: While infrared and optical single-photon detectors exist at high quantum efficiencies, detecting single microwave photons has been an ongoing challenge. Specifically, microwave photon detection is challenging compared to its optical counterpart as its energy scale is four to five orders of magnitude smaller, necessitating lower operating temperatures. Here, we propose a hybrid spin-optomechanical interface to detect single microwave photons. The microwave photons are coupled to a phononic resonator via piezoelectric actuation. This phononic cavity also acts as a photonic cavity with an embedded Silicon-Vacancy (SiV) center in diamond. Phonons mediate the quantum state transfer of the microwave cavity to the SiV spin, in order to allow for high spin-mechanical coupling at the single quantum level. From this, the optical cavity is used to perform a cavity-enhanced single-shot readout of the spin-state. Here, starting with a set of experimentally realizable parameters, we simulate the complete protocol and estimate an overall detection success probability $P_s^0$ of $0.972$, Shannon's mutual information $I^{0}(X;Y)$ of $0.82\ln(2)$, and a total detection time of $\sim2$ $\mu s$. We also talk about the experimental regimes in which $P_s^0$ tends to near unity and $I^{0}(X;Y)$ tends to $\ln(2)$ indicating exactly one bit of information retrieval about the presence or absence of a microwave photon.

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