2021
DOI: 10.48550/arxiv.2103.00877
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Pulsed characteristic-function measurement of a thermalizing harmonic oscillator

Ralf Betzholz,
Yu Liu,
Jianming Cai

Abstract: We present a method for the direct measurement of the Wigner characteristic function of a damped harmonic oscillator that is completely inaccessible for control or measurement. The strategy employs a recently proposed probe-measurement-based scheme [Phys. Rev. Lett. 122, 110406 (2019)] which relies on the pulsed control of a two-level probe. We generalize this scheme to the case of a non-unitary time evolution of the target harmonic oscillator, describing its damping by a finite-temperature environment, given … Show more

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