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<p>This work provides a theoretical study of a quantum system consisting of three two-level atoms coupled to a single-mode cavity field, focusing on the effects of intrinsic decoherence (ID). The system’s evolution is modeled using Milburn equation, with atoms initially excited and the field in a coherent state. The dynamics evolution of linear entropy (purity), the <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11082_2025_8367_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">\(l_1\)</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>l</mi> <mn>1</mn> </msub> </math></EquationSource> </InlineEquation>-norm (coherence), and the mean photon number (collapse-revival) are analyzed. The results indicate that, as the decoherence parameter <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11082_2025_8367_Article_IEq2.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="13" /> </InlineMediaObject> <EquationSource Format="TEX">\(\gamma\)</EquationSource> <EquationSource Format="MATHML"><math> <mi>γ</mi> </math></EquationSource> </InlineEquation> increases, purity and coherence decrease, and collapse-revival features are progressively suppressed. These findings highlight the key role of intrinsic decoherence in degrading the quantum properties of atom-field systems, which is essential for understanding and improving quantum technologies under intrinsic decoherence.</p>

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Intrinsic decoherence in a system of three symmetric two-level atoms coupled to a single-mode cavity field

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  • 发表日期：

    2025年7月24日

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  • Tamer A. Seoudy

摘要

This work provides a theoretical study of a quantum system consisting of three two-level atoms coupled to a single-mode cavity field, focusing on the effects of intrinsic decoherence (ID). The system’s evolution is modeled using Milburn equation, with atoms initially excited and the field in a coherent state. The dynamics evolution of linear entropy (purity), the \(l_1\) l 1 -norm (coherence), and the mean photon number (collapse-revival) are analyzed. The results indicate that, as the decoherence parameter \(\gamma\) γ increases, purity and coherence decrease, and collapse-revival features are progressively suppressed. These findings highlight the key role of intrinsic decoherence in degrading the quantum properties of atom-field systems, which is essential for understanding and improving quantum technologies under intrinsic decoherence.