Extracting quantum work statistics and fluctuation theorems by single-qubit interferometry
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Date
2013
Authors
Dorner, Ross
Clark, Stephen R.
Heaney, Libby
Fazio, Rosario
Goold, John
Vedral, Vlatko
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American Physical Society
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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.
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Free energy differences
Citation
Dorner, R., Clark, S. R., Heaney, L., Fazio, R., Goold, J. and Vedral, V. (2013) 'Extracting quantum work statistics and fluctuation theorems by single-qubit interferometry', Physical Review Letters, 110(23), 230601 (5pp). doi: 10.1103/PhysRevLett.110.230601
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© 2013, American Physical Society