Noninvasiveness and time symmetry of weak measurements

Cite This

Files in this item

Checksum: MD5:697b2feafbeec6a80182cb54add9d367

BEDNORZ, Adam, Kurt FRANKE, Wolfgang BELZIG, 2013. Noninvasiveness and time symmetry of weak measurements. In: New Journal of Physics. 15(2), 023043. ISSN 1367-2630. eISSN 1367-2630. Available under: doi: 10.1088/1367-2630/15/2/023043

@article{Bednorz2013Nonin-22478, title={Noninvasiveness and time symmetry of weak measurements}, year={2013}, doi={10.1088/1367-2630/15/2/023043}, number={2}, volume={15}, issn={1367-2630}, journal={New Journal of Physics}, author={Bednorz, Adam and Franke, Kurt and Belzig, Wolfgang}, note={Article Number: 023043} }

<rdf:RDF xmlns:dcterms="" xmlns:dc="" xmlns:rdf="" xmlns:bibo="" xmlns:dspace="" xmlns:foaf="" xmlns:void="" xmlns:xsd="" > <rdf:Description rdf:about=""> <bibo:uri rdf:resource=""/> <dcterms:rights rdf:resource=""/> <dc:language>eng</dc:language> <dcterms:issued>2013</dcterms:issued> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dcterms:abstract xml:lang="eng">Measurements in classical and quantum physics are described in fundamentally different ways. Nevertheless, one can formally define similar measurement procedures with respect to the disturbance they cause. Obviously, strong measurements, both classical and quantum, are invasive—they disturb the measured system. We show that it is possible to define general weak measurements, which are noninvasive: the disturbance becomes negligible as the measurement strength goes to zero. Classical intuition suggests that noninvasive measurements should be time symmetric (if the system dynamics is reversible) and we confirm that correlations are time-reversal symmetric in the classical case. However, quantum weak measurements - defined analogously to their classical Counterparts - can be noninvasive but not time symmetric. We present a simple example of measurements on a two-level system which violates time symmetry and propose an experiment with quantum dots to measure the timesymmetry violation in a third-order current correlation function.</dcterms:abstract> <dc:creator>Belzig, Wolfgang</dc:creator> <dcterms:hasPart rdf:resource=""/> <dc:creator>Franke, Kurt</dc:creator> <dc:contributor>Bednorz, Adam</dc:contributor> <dcterms:available rdf:datatype="">2013-04-03T11:16:56Z</dcterms:available> <dcterms:title>Noninvasiveness and time symmetry of weak measurements</dcterms:title> <dcterms:isPartOf rdf:resource=""/> <dspace:hasBitstream rdf:resource=""/> <dc:date rdf:datatype="">2013-04-03T11:16:56Z</dc:date> <dc:creator>Bednorz, Adam</dc:creator> <dc:contributor>Belzig, Wolfgang</dc:contributor> <dcterms:bibliographicCitation>New Journal of Physics ; 15 (2013). - 023043</dcterms:bibliographicCitation> <dc:contributor>Franke, Kurt</dc:contributor> <dc:rights>Attribution-NonCommercial-ShareAlike 3.0 Unported</dc:rights> <dspace:isPartOfCollection rdf:resource=""/> </rdf:Description> </rdf:RDF>

Downloads since Oct 1, 2014 (Information about access statistics)

Bednorz_224789.pdf 154

This item appears in the following Collection(s)

Attribution-NonCommercial-ShareAlike 3.0 Unported Except where otherwise noted, this item's license is described as Attribution-NonCommercial-ShareAlike 3.0 Unported

Search KOPS


My Account