Tuning the Aharonov-Bohm effect with dephasing in nonequilibrium transport
Name
PhysRevB.99.075436.pdf
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1.38 MB
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Adobe PDF
Checksum (MD5)
1914980203fed48040a9d1402bcba07b
Author(s)
Engelhardt, Georg
Cao, Jianshu
Date Issued
February 2019
Journal
Physical Review B
Publisher
American Physical Society
Citation
Engelhardt, Georg, and Jianshu Cao. “Tuning the Aharonov-Bohm Effect with Dephasing in Nonequilibrium Transport.” Physical Review B, vol. 99, no. 7, Feb. 2019. © 2019 American Physical Society
Version
Final published version
Abstract
The Aharonov-Bohm (AB) effect, which predicts that a magnetic field strongly influences the wave function of an electrically charged particle, is investigated in a three-site system in terms of the quantum control by an additional dephasing source. The AB effect leads to a nonmonotonic dependence of the steady-state current on the gauge phase associated with the molecular ring. This dependence is sensitive to site energy, temperature, and dephasing, and can be explained using the concept of the dark state. Although the phase effect vanishes in the steady-state current for strong dephasing, the phase dependence remains visible in an associated waiting-time distribution, especially at short times. Interestingly, the phase rigidity (i.e., the symmetry of the AB phase) observed in the steady-state current is now broken in the waiting-time statistics, which can be explained by the interference between transfer pathways.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.99.075436
