Tuning the Aharonov-Bohm effect with dephasing in nonequilibrium transport
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...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2019
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| Online Access: | http://hdl.handle.net/1721.1/121051 https://orcid.org/0000-0001-7616-7809 |
| _version_ | 1826213463774461952 |
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| author | Engelhardt, Georg Cao, Jianshu |
| author2 | Massachusetts Institute of Technology. Department of Chemistry |
| author_facet | Massachusetts Institute of Technology. Department of Chemistry Engelhardt, Georg Cao, Jianshu |
| author_sort | Engelhardt, Georg |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T15:49:36Z |
| format | Article |
| id | mit-1721.1/121051 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:49:36Z |
| publishDate | 2019 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1210512022-09-29T16:23:24Z Tuning the Aharonov-Bohm effect with dephasing in nonequilibrium transport Engelhardt, Georg Cao, Jianshu Massachusetts Institute of Technology. Department of Chemistry Cao, Jianshu 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. National Science Foundation (U.S.) (Grant CHE 1800301) National Science Foundation (U.S.) (Grant CHE 1836913) National Natural Science Foundation (China) (Grant U1530401) China Postdoctoral Science Foundation (Grant 2018M640054) 2019-03-22T14:06:15Z 2019-03-22T14:06:15Z 2019-02 2019-02 2019-02-28T18:00:17Z Article http://purl.org/eprint/type/JournalArticle 2469-9950 2469-9969 http://hdl.handle.net/1721.1/121051 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 https://orcid.org/0000-0001-7616-7809 en http://dx.doi.org/10.1103/PhysRevB.99.075436 Physical Review B Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Physical Society application/pdf American Physical Society American Physical Society |
| spellingShingle | Engelhardt, Georg Cao, Jianshu Tuning the Aharonov-Bohm effect with dephasing in nonequilibrium transport |
| title | Tuning the Aharonov-Bohm effect with dephasing in nonequilibrium transport |
| title_full | Tuning the Aharonov-Bohm effect with dephasing in nonequilibrium transport |
| title_fullStr | Tuning the Aharonov-Bohm effect with dephasing in nonequilibrium transport |
| title_full_unstemmed | Tuning the Aharonov-Bohm effect with dephasing in nonequilibrium transport |
| title_short | Tuning the Aharonov-Bohm effect with dephasing in nonequilibrium transport |
| title_sort | tuning the aharonov bohm effect with dephasing in nonequilibrium transport |
| url | http://hdl.handle.net/1721.1/121051 https://orcid.org/0000-0001-7616-7809 |
| work_keys_str_mv | AT engelhardtgeorg tuningtheaharonovbohmeffectwithdephasinginnonequilibriumtransport AT caojianshu tuningtheaharonovbohmeffectwithdephasinginnonequilibriumtransport |