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Noninvasive Quantum Measurement of Arbitrary Operator Order by Engineered Non-Markovian Detectors
JournalArticle (Originalarbeit in einer wissenschaftlichen Zeitschrift)
 
ID 4493573
Author(s) Bülte, Johannes; Bednorz, Adam; Bruder, Christoph; Belzig, Wolfgang
Author(s) at UniBasel Bruder, Christoph
Year 2018
Title Noninvasive Quantum Measurement of Arbitrary Operator Order by Engineered Non-Markovian Detectors
Journal Physical Review Letters
Volume 120
Number 14
Pages / Article-Number 140407
Abstract The development of solid-state quantum technologies requires the understanding of quantum measurements in interacting, nonisolated quantum systems. In general, a permanent coupling of detectors to a quantum system leads to memory effects that have to be taken into account in interpreting the measurement results. We analyze a generic setup of two detectors coupled to a quantum system and derive a compact formula in the weak-measurement limit that interpolates between an instantaneous (text-book type) and almost continuous-detector dynamics-dependent-measurement. A quantum memory effect that we term ``system-mediated detector-detector interaction`` is crucial to observe noncommuting observables simultaneously. Finally, we propose a mesoscopic double-dot detector setup in which the memory effect is tunable and that can be used to explore the transition to non-Markovian quantum measurements experimentally.
Publisher American Physical Society
ISSN/ISBN 0031-9007 ; 1079-7114
edoc-URL https://edoc.unibas.ch/68077/
Full Text on edoc No
Digital Object Identifier DOI 10.1103/PhysRevLett.120.140407
PubMed ID http://www.ncbi.nlm.nih.gov/pubmed/29694141
ISI-Number 000429451000002
Document type (ISI) Journal Article
 
   

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