Quantum nondemolition measurements in the relativistic Dirac oscillator
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PhysRevA.104.022602.pdf
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Final Published Version
Affiliation
James C. Wyant College of Optical Sciences, University of ArizonaDepartment of Physics, University of Arizona
Issue Date
2021
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American Physical SocietyCitation
Sun, W., Zhang, K., Meystre, P., & Zhang, W. (2021). Quantum nondemolition measurements in the relativistic Dirac oscillator. Physical Review A, 104(2).Journal
Physical Review ARights
Copyright © 2021 American Physical Society.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
We investigate the feasibility of performing quantum nondemolition (QND) measurements in the one-dimensional Dirac oscillator, a frequently used toy model to investigate relativistic extensions of nonrelativistic quantum effects. We derive general expressions for its QND observables and find that they are in general complex combinations of the position, momentum, and spin operators, which makes them challenging to realize experimentally. However, the situation is considerably simplified in both the weakly and strongly relativistic limits, where they should be amenable to an experimental demonstration. This suggests exploiting continuous measurements of small departures from the QND character of these variables in the intermediate regime as probes of relativistic effects. © 2021 American Physical Society.Note
Immediate accessISSN
2469-9926Version
Final published versionae974a485f413a2113503eed53cd6c53
10.1103/PhysRevA.104.022602