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.
Vacanti, G., Fazio, R., Kim, M., Palma, G., Paternostro, M., Vedral, V. (2012). Geometric-phase backaction in a mesoscopic qubit-oscillator system. PHYSICAL REVIEW A, 85, 022129-1-022129-5 [10.1103/PhysRevA.85.022129].
Geometric-phase backaction in a mesoscopic qubit-oscillator system
PALMA, Gioacchino Massimo;Paternostro, M;
2012-01-01
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.File | Dimensione | Formato | |
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