Type of Publication: | Preprint |
URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-224754 |
Author: | Bednorz, Adam; Bruder, Christoph; Reulet, Bertrand; Belzig, Wolfgang |
Year of publication: | 2012 |
ArXiv-ID: | arXiv:1211.6056 |
Summary: |
A long-standing 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 weak-measurement theory taking into account a finite interaction time between the system and the detector. Importantly, the nonsymmetrized ordering reveals its nonclassical nature already in second-order correlations, contrary to symmetrized ordering. This feature can be related to the squeezing of the many-body state of the transported electrons in a ac-driven tunnel junction.
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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@unpublished{Bednorz2012Nonsy-22475, title={Nonsymmetrized Correlations in Quantum Noninvasive Measurements}, year={2012}, author={Bednorz, Adam and Bruder, Christoph and Reulet, Bertrand and Belzig, Wolfgang} }
Bednorz_224754.pdf | 499 |