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Journal Articles Physical Review A : Atomic, molecular, and optical physics Year : 2017

Proposal for detecting a single electron spin in a microwave resonator

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Abstract

We propose a method for detecting the presence of a single spin in a crystal by coupling it to a high-quality factor superconducting planar resonator. By confining the microwave field in the vicinity of a constriction of nanometric dimensions, the coupling constant can be as high as 5–10 kHz. This coupling affects the amplitude of the field reflected by the resonator and the integrated homodyne signal allows detection of a single spin with unit signal-to-noise ratio within few milliseconds. We further show that a stochastic master equation approach and a Bayesian analysis of the full time-dependent homodyne signal improves this figure by ∼30% for typical parameters.
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Dates and versions

cea-01491278 , version 1 (16-03-2017)

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P. Haikka, Y. Kubo, A. Bienfait, Patrice Bertet, K. Mølmer. Proposal for detecting a single electron spin in a microwave resonator. Physical Review A : Atomic, molecular, and optical physics, 2017, 95, pp.22306. ⟨10.1103/PhysRevA.95.022306⟩. ⟨cea-01491278⟩
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