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Effects of entanglement in controlled dephasing

descriptionPublicationkeyboard_double_arrow_right Article , Preprint 07 May 2001Embargo end date: 01 Jan 2001 Italy English Publisher:American Physical Society (APS)Journal:Physical Review B, volume 63 (issn: 0163-1829, eissn: 1095-3795, Copyright policy )
Authors: Silva, A.; Levit, S.;

doi: 10.1103/physrevb.63.201309 , 10.48550/arxiv.cond-mat/0101081

arXiv: cond-mat/0101081

handle: 20.500.11767/12221

Effects of entanglement in controlled dephasing

Abstract

In controlled dephasing as a result of the interaction of a controlled environment (dephasor) and the system under observation (dephasee) the states of the two subsystems are entangled. Using as an example the ``Which Path Detector'', we discuss how the entanglement influences the controlled dephasing. In particular, we calculate the suppression $��$ of A-B oscillations as a function of the bias $eV$ applied to the QPC and the coupling $��$ of the QD to the leads. At low temperatures the entanglement produces a smooth crossover from $��\propto (eV/��)^2$, when $eV \ll ��$ to $��\propto eV/��$, for $eV \gg ��$.

4 pages, 1 figure

Country
Italy
Related Organizations
Keywords

Condensed Matter - Mesoscale and Nanoscale Physics, quantum-dot; interference; interferometer; detector, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), FOS: Physical sciences

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    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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    influence
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    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
20
Average
Top 10%
Top 10%
Green