Extracting quantum work statistics and fluctuation theorems by single qubit interferometry

Autor:	Dorner, R., Clark, S. R., Heaney, L., Fazio, R., Goold, J., Vedral, V.
Rok vydání:	2013
Předmět:	Quantum Physics Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Statistical Mechanics
Zdroj:	Phys. Rev. Lett. 110, 230601 (2013)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.110.230601
Popis:	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. Comment: 4.5 pages. 2 Figures. See related paper "Measuring the characteristic function of the work distribution" by L. Mazzola et al. This version - additional analysis undertaken
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1301.7021 Zobrazit plný text záznamu View this record from Arxiv