Full counting statistics of a general quantum mechanical variable

Details Full counting statistics of a general quantum mechanical variable Full counting statistics of a general quantum mechanical variable

2001-07-06

arxiv.org/abs/cond-mat/0107133v1

Eur. Phys. J. B 35, 413 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages

Scientific paper

10.1140/epjb/e2003-00293-1

We present here a quantum mechanical framework for defining the statistics of measurements of time integrals of A(t), A(t) being a quantum mechanical variable. This is a generalization of the so-called full counting statistics proposed earlier for DC electric currents. We develop an influence functional formalism that allows us to study the quantum system along with the measuring device thus fully accounting for the action of the detector on the system to be measured. We define the full counting statistics of an arbitrary variable by means of an evolution operator that relates initial and final density matrices of the measuring device. In this way we are able to resolve inconsistencies that occur in earlier definitions. We suggest two schemes whereby the so defined full statistics can be observed experimentally.

Affiliated with

Also associated with

No associations

Rating

Full counting statistics of a general quantum mechanical variable does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Full counting statistics of a general quantum mechanical variable, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Full counting statistics of a general quantum mechanical variable will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-361071