Effects of a quantum measurement on the electric conductivity: Application to graphene
2010 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 81, no 7, 073403Article in journal (Refereed) Published
We generalize the standard linear-response (Kubo) theory to obtain the conductivity of a system that is subject to a quantum measurement of the current. Our approach can be used to specifically elucidate how back-action inherent to quantum measurements affects electronic transport. To illustrate the utility of our general formalism, we calculate the frequency-dependent conductivity of graphene and discuss the effect of measurement-induced decoherence on its value in the dc limit. We are able to resolve an ambiguity related to the parametric dependence of the minimal conductivity.
Place, publisher, year, edition, pages
2010. Vol. 81, no 7, 073403
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:du-11202DOI: 10.1103/PhysRevB.81.073403ISI: 000274998200020OAI: oai:DiVA.org:du-11202DiVA: diva2:565621