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Title: Extracting quantum work statistics and fluctuation theorems by single-qubit interferometry
Authors: Dorner, R.
Clark, S.R. 
Heaney, L. 
Fazio, R.
Goold, J.
Vedral, V. 
Issue Date: 7-Jun-2013
Citation: Dorner, R., Clark, S.R., Heaney, L., Fazio, R., Goold, J., Vedral, V. (2013-06-07). Extracting quantum work statistics and fluctuation theorems by single-qubit interferometry. Physical Review Letters 110 (23) : -. ScholarBank@NUS Repository.
Abstract: We propose an experimental scheme to verify the quantum nonequilibrium fluctuation relations using current technology. Specifically, we show that the characteristic function of the work distribution for a nonequilibrium quench of a general quantum system can be extracted by Ramsey interferometry of a single probe qubit. Our scheme paves the way for the full characterization of nonequilibrium processes in a variety of 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 pseudospin provides a convenient probe qubit. © 2013 American Physical Society.
Source Title: Physical Review Letters
ISSN: 00319007
DOI: 10.1103/PhysRevLett.110.230601
Appears in Collections:Staff Publications

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