Type of Publication:  Preprint 
URI (citable link):  http://nbnresolving.de/urn:nbn:de:bsz:352224754 
Author:  Bednorz, Adam; Bruder, Christoph; Reulet, Bertrand; Belzig, Wolfgang 
Year of publication:  2012 
ArXivID:  arXiv:1211.6056 
Summary: 
A longstanding problem in quantum mesoscopic physics is how to order operators in quantum noise expressions like <I(\omega)I(\omega)> where I(\omega) is the measured current at frequency \omega. Symmetrized ordering of operators describes a classical measurement while nonsymmetrized ordering corresponds to a quantum detector, sensitive to either emission or absorption of photons. We show that both ordering schemes can be embedded in quantum weakmeasurement theory taking into account a finite interaction time between the system and the detector. Importantly, the nonsymmetrized ordering reveals its nonclassical nature already in secondorder correlations, contrary to symmetrized ordering. This feature can be related to the squeezing of the manybody state of the transported electrons in a acdriven tunnel junction.

Subject (DDC):  530 Physics 
Link to License:  In Copyright 
Bibliography of Konstanz:  Yes 
BEDNORZ, Adam, Christoph BRUDER, Bertrand REULET, Wolfgang BELZIG, 2012. Nonsymmetrized Correlations in Quantum Noninvasive Measurements
@unpublished{Bednorz2012Nonsy22475, title={Nonsymmetrized Correlations in Quantum Noninvasive Measurements}, year={2012}, author={Bednorz, Adam and Bruder, Christoph and Reulet, Bertrand and Belzig, Wolfgang} }
Bednorz_224754.pdf  322 