Minimal quantum thermal machine in a bandgap environment: non-Markovian features and anti-Zeno advantage
A minimal model of a quantum thermal machine is analyzed, where a driven two level working medium (WM) is embedded in an environment (reservoir) whose spectrum possesses bandgaps. The transition frequency of the WM is periodically modulated so as to be in alternating spectral overlap with hot or col...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/ac575b |
| _version_ | 1797748492221808640 |
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| author | Meng Xu J T Stockburger G Kurizki J Ankerhold |
| author_facet | Meng Xu J T Stockburger G Kurizki J Ankerhold |
| author_sort | Meng Xu |
| collection | DOAJ |
| description | A minimal model of a quantum thermal machine is analyzed, where a driven two level working medium (WM) is embedded in an environment (reservoir) whose spectrum possesses bandgaps. The transition frequency of the WM is periodically modulated so as to be in alternating spectral overlap with hot or cold reservoirs whose spectra are separated by a bandgap. Approximate and exact treatments supported by analytical considerations yield a complete characterization of this thermal machine in the deep quantum domain. For slow to moderate modulation, the spectral response of the reservoirs is close to equilibrium, exhibiting sideband (Floquet) resonances in the heat currents and power output. In contrast, for faster modulation, strong-coupling and non-Markovian features give rise to correlations between the WM and the reservoirs and between the two reservoirs. Power boost of strictly quantum origin (‘quantum advantage’) is then found for both continuous and segmental fast modulation that leads to the anti-Zeno effect of enhanced spectral reservoir response. Such features cannot be captured by standard Markovian treatments. |
| first_indexed | 2024-03-12T16:06:32Z |
| format | Article |
| id | doaj.art-62f6aea775004706adb0618e5d4d8147 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:06:32Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-62f6aea775004706adb0618e5d4d81472023-08-09T14:21:06ZengIOP PublishingNew Journal of Physics1367-26302022-01-0124303500310.1088/1367-2630/ac575bMinimal quantum thermal machine in a bandgap environment: non-Markovian features and anti-Zeno advantageMeng Xu0https://orcid.org/0000-0002-2440-0645J T Stockburger1G Kurizki2J Ankerhold3Institute for Complex Quantum Systems and IQST, Ulm University , Albert-Einstein-Allee 11, D-89069 Ulm, GermanyInstitute for Complex Quantum Systems and IQST, Ulm University , Albert-Einstein-Allee 11, D-89069 Ulm, GermanyDepartment of Chemical and Biological Physics, Weizmann Institute of Science , Rehovot 7610001, IsraelInstitute for Complex Quantum Systems and IQST, Ulm University , Albert-Einstein-Allee 11, D-89069 Ulm, GermanyA minimal model of a quantum thermal machine is analyzed, where a driven two level working medium (WM) is embedded in an environment (reservoir) whose spectrum possesses bandgaps. The transition frequency of the WM is periodically modulated so as to be in alternating spectral overlap with hot or cold reservoirs whose spectra are separated by a bandgap. Approximate and exact treatments supported by analytical considerations yield a complete characterization of this thermal machine in the deep quantum domain. For slow to moderate modulation, the spectral response of the reservoirs is close to equilibrium, exhibiting sideband (Floquet) resonances in the heat currents and power output. In contrast, for faster modulation, strong-coupling and non-Markovian features give rise to correlations between the WM and the reservoirs and between the two reservoirs. Power boost of strictly quantum origin (‘quantum advantage’) is then found for both continuous and segmental fast modulation that leads to the anti-Zeno effect of enhanced spectral reservoir response. Such features cannot be captured by standard Markovian treatments.https://doi.org/10.1088/1367-2630/ac575bquantum thermal machinesquantum heat transportnon-perturbative open quantum dynamicsanti-Zeno effectspectral bandgaps |
| spellingShingle | Meng Xu J T Stockburger G Kurizki J Ankerhold Minimal quantum thermal machine in a bandgap environment: non-Markovian features and anti-Zeno advantage New Journal of Physics quantum thermal machines quantum heat transport non-perturbative open quantum dynamics anti-Zeno effect spectral bandgaps |
| title | Minimal quantum thermal machine in a bandgap environment: non-Markovian features and anti-Zeno advantage |
| title_full | Minimal quantum thermal machine in a bandgap environment: non-Markovian features and anti-Zeno advantage |
| title_fullStr | Minimal quantum thermal machine in a bandgap environment: non-Markovian features and anti-Zeno advantage |
| title_full_unstemmed | Minimal quantum thermal machine in a bandgap environment: non-Markovian features and anti-Zeno advantage |
| title_short | Minimal quantum thermal machine in a bandgap environment: non-Markovian features and anti-Zeno advantage |
| title_sort | minimal quantum thermal machine in a bandgap environment non markovian features and anti zeno advantage |
| topic | quantum thermal machines quantum heat transport non-perturbative open quantum dynamics anti-Zeno effect spectral bandgaps |
| url | https://doi.org/10.1088/1367-2630/ac575b |
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