6533b834fe1ef96bd129e1f9
RESEARCH PRODUCT
Geometric-phase backaction in a mesoscopic qubit-oscillator system
Mauro PaternostroG. M. PalmaRosario FazioRosario FazioVlatko VedralVlatko VedralGiovanni VacantiMihyang Kimsubject
Quantum phase transitionPhysicsNANOMECHANICAL RESONATOR; BACK-ACTION; QUANTUM; OPTOMECHANICS; MECHANICS; EVOLUTION; MODEAtomic and Molecular Physics and OpticsSettore FIS/03 - Fisica Della MateriaPhase qubitOptical phase spaceClassical mechanicsGeometric phaseQuantum harmonic oscillatorPhase spaceQubitQuantum mechanicsGeometric phases atomic physics quantum interferometryHarmonic oscillatordescription
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. © 2012 American Physical Society.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-02-29 |