2000 character limit reached
Extracting quantum work statistics and fluctuation theorems by single qubit interferometry (1301.7021v2)
Published 29 Jan 2013 in quant-ph, cond-mat.mes-hall, and cond-mat.stat-mech
Abstract: 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.