Geometric-phase backaction in a mesoscopic qubit-oscillator system

G. Vacanti, R. Fazio, Myungshik Kim, Massimo Palma, Mauro Paternostro, V. Vedral

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)


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.
Original languageEnglish
Article number022129
Pages (from-to)022129
Number of pages1
JournalPhysical Review A
Issue number2
Publication statusPublished - 29 Feb 2012

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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