Geometric-phase backaction in a mesoscopic qubit-oscillator system

Gioacchino Massimo Palma, Vacanti, Vedral, Kim, Fazio, Palma, Paternostro

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Abstract

We illustrate a reverse Von Neumann measurement scheme in which a geometric phase induced on a quantum harmonic oscillator is measured using a microscopic qubit as a probe. We show how such a phase, generated by a cyclic evolution in the phase space of the harmonic oscillator, can be kicked back on the qubit, which plays the role of a quantum interferometer. We also extend our study to finite-temperature dissipative Markovian dynamics and discuss potential implementations in micro-and nanomechanical devices coupled to an effective two-level system.
Lingua originaleEnglish
pagine (da-a)022129-1-022129-5
Numero di pagine5
RivistaPHYSICAL REVIEW A
Volume85
Stato di pubblicazionePublished - 2012

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All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cita questo

Palma, G. M., Vacanti, Vedral, Kim, Fazio, Palma, & Paternostro (2012). Geometric-phase backaction in a mesoscopic qubit-oscillator system. PHYSICAL REVIEW A, 85, 022129-1-022129-5.