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Tunable steady-state coherence via composite system–environment interactions beyond weak tunnel coupling.

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Title: Tunable steady-state coherence via composite system–environment interactions beyond weak tunnel coupling.
Authors: He, Ming1 (AUTHOR), Weng, Yuyan1,2 (AUTHOR), Xu, Shijie3 (AUTHOR), Dong, Yuli1 (AUTHOR) yldong@suda.edu.cn
Source: International Journal of Modern Physics C: Computational Physics & Physical Computation. May2026, Vol. 37 Issue 5, p1-16. 16p.
Subjects: Quantum coherence, Quantum tunneling, Hybrid systems, Temperature, Coherence (Nuclear physics)
Abstract: We study a two-level system with an additional tunneling effect, where the general interaction with an Ohmic-class spectrum can be controlled by adjusting the coupling angle. We outline the derivation of the time-local microscopic non-Markovian master equation after renormalizing the eigenstates in the two-level system, hence removing the restriction of weak tunneling coupling. Further, two quantum coherence measures are exploited to analyze steady-state coherences (SSC). We identify that under strong tunneling effects, a specific coupling angle enables SSC generation that is both independent of the Ohmic-like spectral density and capable of reaching substantial magnitudes. Moreover, in the vicinity of this critical angle, SSC exhibits an opposite dependence on the Ohmic parameter in different regions. In addition, we examine the impact of Ohmic parameters and environmental temperature on SSC, demonstrating that optimizing these factors provides an effective strategy to maximize SSC. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Modern Physics C: Computational Physics & Physical Computation is the property of World Scientific Publishing Company and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 189732906
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PubTypeId: academicJournal
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  Data: Tunable steady-state coherence via composite system–environment interactions beyond weak tunnel coupling.
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  Data: <searchLink fieldCode="AR" term="%22He%2C+Ming%22">He, Ming</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Weng%2C+Yuyan%22">Weng, Yuyan</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Shijie%22">Xu, Shijie</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dong%2C+Yuli%22">Dong, Yuli</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yldong@suda.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Modern+Physics+C%3A+Computational+Physics+%26+Physical+Computation%22">International Journal of Modern Physics C: Computational Physics & Physical Computation</searchLink>. May2026, Vol. 37 Issue 5, p1-16. 16p.
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  Data: <searchLink fieldCode="DE" term="%22Quantum+coherence%22">Quantum coherence</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+tunneling%22">Quantum tunneling</searchLink><br /><searchLink fieldCode="DE" term="%22Hybrid+systems%22">Hybrid systems</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature%22">Temperature</searchLink><br /><searchLink fieldCode="DE" term="%22Coherence+%28Nuclear+physics%29%22">Coherence (Nuclear physics)</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: We study a two-level system with an additional tunneling effect, where the general interaction with an Ohmic-class spectrum can be controlled by adjusting the coupling angle. We outline the derivation of the time-local microscopic non-Markovian master equation after renormalizing the eigenstates in the two-level system, hence removing the restriction of weak tunneling coupling. Further, two quantum coherence measures are exploited to analyze steady-state coherences (SSC). We identify that under strong tunneling effects, a specific coupling angle enables SSC generation that is both independent of the Ohmic-like spectral density and capable of reaching substantial magnitudes. Moreover, in the vicinity of this critical angle, SSC exhibits an opposite dependence on the Ohmic parameter in different regions. In addition, we examine the impact of Ohmic parameters and environmental temperature on SSC, demonstrating that optimizing these factors provides an effective strategy to maximize SSC. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Modern Physics C: Computational Physics & Physical Computation is the property of World Scientific Publishing Company and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1142/S0129183125501141
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 16
        StartPage: 1
    Subjects:
      – SubjectFull: Quantum coherence
        Type: general
      – SubjectFull: Quantum tunneling
        Type: general
      – SubjectFull: Hybrid systems
        Type: general
      – SubjectFull: Temperature
        Type: general
      – SubjectFull: Coherence (Nuclear physics)
        Type: general
    Titles:
      – TitleFull: Tunable steady-state coherence via composite system–environment interactions beyond weak tunnel coupling.
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          Name:
            NameFull: He, Ming
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            NameFull: Weng, Yuyan
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            NameFull: Xu, Shijie
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          Name:
            NameFull: Dong, Yuli
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          Dates:
            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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              Value: 37
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              Value: 5
          Titles:
            – TitleFull: International Journal of Modern Physics C: Computational Physics & Physical Computation
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