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Quantum dynamics and entanglement in a damped V-type five-level atom interacting with a two-mode cavity field under intensity-dependent coupling.

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Title: Quantum dynamics and entanglement in a damped V-type five-level atom interacting with a two-mode cavity field under intensity-dependent coupling.
Authors: Thabet, Lamia1 (AUTHOR), Abo-Kahla, D. A. M.1,2 (AUTHOR) doaa_abukahla@ymail.com
Source: Optical & Quantum Electronics. May2026, Vol. 58 Issue 5, p1-17. 17p.
Subjects: Coupling schemes, Quantum coherence, Quantum states, Optical resonance, Quantum entanglement, Quantum theory
Abstract: In this paper, we investigate the quantum dynamics of a system comprising a non-degenerate V-type five-level atom interacting with a two-mode cavity field under an intensity-dependent coupling regime. We analyze the effects of atomic and cavity decay rates, detunings, the presence of a Kerr-like medium, and the form of the coupling function (constant versus intensity-dependent) on the quantum properties of the system. The temporal evolution of purity, fidelity, and the Mandel Q-parameter is studied in detail. Our results demonstrate that intensity-dependent coupling, with the form , significantly accelerates the loss of quantum coherence, resulting in a faster degradation of purity and fidelity compared to the constant coupling case (). Nevertheless, the intensity-dependent coupling proves more effective in generating non-classical states of the radiation field, as evidenced by pronounced sub-Poissonian photon statistics reflected in strongly negative values of the Mandel Q-parameter. This work highlights a fundamental trade-off between the stability of quantum states and the ability to produce non-classical light in cavity quantum electrodynamics (QED) systems. [ABSTRACT FROM AUTHOR]
Copyright of Optical & Quantum Electronics is the property of Springer Nature 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.)
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  Data: Quantum dynamics and entanglement in a damped V-type five-level atom interacting with a two-mode cavity field under intensity-dependent coupling.
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  Data: <searchLink fieldCode="AR" term="%22Thabet%2C+Lamia%22">Thabet, Lamia</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Abo-Kahla%2C+D%2E+A%2E+M%2E%22">Abo-Kahla, D. A. M.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> doaa_abukahla@ymail.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Optical+%26+Quantum+Electronics%22">Optical & Quantum Electronics</searchLink>. May2026, Vol. 58 Issue 5, p1-17. 17p.
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  Data: In this paper, we investigate the quantum dynamics of a system comprising a non-degenerate V-type five-level atom interacting with a two-mode cavity field under an intensity-dependent coupling regime. We analyze the effects of atomic and cavity decay rates, detunings, the presence of a Kerr-like medium, and the form of the coupling function (constant versus intensity-dependent) on the quantum properties of the system. The temporal evolution of purity, fidelity, and the Mandel Q-parameter is studied in detail. Our results demonstrate that intensity-dependent coupling, with the form , significantly accelerates the loss of quantum coherence, resulting in a faster degradation of purity and fidelity compared to the constant coupling case (). Nevertheless, the intensity-dependent coupling proves more effective in generating non-classical states of the radiation field, as evidenced by pronounced sub-Poissonian photon statistics reflected in strongly negative values of the Mandel Q-parameter. This work highlights a fundamental trade-off between the stability of quantum states and the ability to produce non-classical light in cavity quantum electrodynamics (QED) systems. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Optical & Quantum Electronics is the property of Springer Nature 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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      – SubjectFull: Quantum states
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      – SubjectFull: Optical resonance
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              Text: May2026
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