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Extracting quantum work statistics and fluctuation theorems by single qubit interferometry

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arxiv 1301.7021 v2 pith:YOQ3XZSH submitted 2013-01-29 quant-ph cond-mat.mes-hallcond-mat.stat-mech

Extracting quantum work statistics and fluctuation theorems by single qubit interferometry

classification quant-ph cond-mat.mes-hallcond-mat.stat-mech
keywords quantumnon-equilibriumqubitsinglefluctuationinterferometryprobequench
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We propose an experimental scheme to verify the quantum non-equilibrium fluctuation relations using current technology. Specifically, we show that the characteristic function of the work distribution for a non-equilibrium quench of a general quantum system can be extracted from Ramsey interferometry of a single probe qubit. Our scheme paves the way for the full characterisation of non-equilibrium processes in a variety of complex quantum systems ranging from single particles to many-body atomic systems and spin chains. We demonstrate our idea using a time-dependent quench of the motional state of a trapped ion, where the internal pseudo-spin provides a convenient probe qubit.

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Cited by 2 Pith papers

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  2. Subsystem Thermalization and Work Statistical Characterizations of Floquet Dynamics

    quant-ph 2026-07 unverdicted novelty 4.0

    In a driven non-integrable Ising chain, subsystem reduced density matrices and work statistics both detect the frequency-dependent crossover from prethermal to infinite-temperature Floquet regimes.