{"title":"两个超导电荷量子位的时间分数演化","authors":"Abdessamie Chhieb , Mansoura Oumennana , Mostafa Mansour","doi":"10.1016/j.chaos.2025.117331","DOIUrl":null,"url":null,"abstract":"<div><div>We investigate the quantum correlation dynamics between two superconducting charge qubits (TSC-Q), governed by the time-fractional Schrödinger equation (TFSE), a framework incorporating non-Markovian memory effects arising from environmental interactions. By analyzing separable and partially entangled initial states, we highlight the central role of the fractional order <span><math><mi>τ</mi></math></span>, Josephson energies (<span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>J</mi><mn>1</mn></mrow></msub></math></span>, <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>J</mi><mn>2</mn></mrow></msub></math></span>), and coupling strength (<span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>m</mi></mrow></msub></math></span>) in modulating concurrence, quantum steering asymmetry, and Bell nonlocality (via the CHSH inequality). Our results indicate that a decrease in the value of <span><math><mi>τ</mi></math></span> promotes a faster generation of quantum correlations for separable and partially entangled states, highlighting the dual role of <span><math><mi>τ</mi></math></span> as both a catalyst and a stabilizer of quantum resources. Furthermore, it is important to note that optimal behavior of quantum correlations is observed when the Josephson energies of the two qubits are close, i.e., when <span><math><mrow><msub><mrow><mi>E</mi></mrow><mrow><mi>J</mi><mn>2</mn></mrow></msub><mo>≈</mo><msub><mrow><mi>E</mi></mrow><mrow><mi>J</mi><mn>1</mn></mrow></msub></mrow></math></span>. In addition, a stronger coupling strength, denoted by <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>m</mi></mrow></msub></math></span>, further enhances the generation of these correlations. The synergy among <span><math><mi>τ</mi></math></span>, <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>J</mi><mn>1</mn></mrow></msub></math></span>, <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>J</mi><mn>2</mn></mrow></msub></math></span>, and <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>m</mi></mrow></msub></math></span> defines a tunable parameter space for engineering memory-driven correlations to mitigate decoherence. These results position the TFSE as a promising tool for modeling non-Markovian dynamics in superconducting architectures, paving the way for robust quantum platforms with enhanced correlations, suitable for scalable quantum computing and secure communication systems.</div></div>","PeriodicalId":9764,"journal":{"name":"Chaos Solitons & Fractals","volume":"201 ","pages":"Article 117331"},"PeriodicalIF":5.6000,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Time fractional evolution of two superconducting charge qubits\",\"authors\":\"Abdessamie Chhieb , Mansoura Oumennana , Mostafa Mansour\",\"doi\":\"10.1016/j.chaos.2025.117331\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>We investigate the quantum correlation dynamics between two superconducting charge qubits (TSC-Q), governed by the time-fractional Schrödinger equation (TFSE), a framework incorporating non-Markovian memory effects arising from environmental interactions. By analyzing separable and partially entangled initial states, we highlight the central role of the fractional order <span><math><mi>τ</mi></math></span>, Josephson energies (<span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>J</mi><mn>1</mn></mrow></msub></math></span>, <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>J</mi><mn>2</mn></mrow></msub></math></span>), and coupling strength (<span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>m</mi></mrow></msub></math></span>) in modulating concurrence, quantum steering asymmetry, and Bell nonlocality (via the CHSH inequality). Our results indicate that a decrease in the value of <span><math><mi>τ</mi></math></span> promotes a faster generation of quantum correlations for separable and partially entangled states, highlighting the dual role of <span><math><mi>τ</mi></math></span> as both a catalyst and a stabilizer of quantum resources. Furthermore, it is important to note that optimal behavior of quantum correlations is observed when the Josephson energies of the two qubits are close, i.e., when <span><math><mrow><msub><mrow><mi>E</mi></mrow><mrow><mi>J</mi><mn>2</mn></mrow></msub><mo>≈</mo><msub><mrow><mi>E</mi></mrow><mrow><mi>J</mi><mn>1</mn></mrow></msub></mrow></math></span>. In addition, a stronger coupling strength, denoted by <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>m</mi></mrow></msub></math></span>, further enhances the generation of these correlations. The synergy among <span><math><mi>τ</mi></math></span>, <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>J</mi><mn>1</mn></mrow></msub></math></span>, <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>J</mi><mn>2</mn></mrow></msub></math></span>, and <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>m</mi></mrow></msub></math></span> defines a tunable parameter space for engineering memory-driven correlations to mitigate decoherence. These results position the TFSE as a promising tool for modeling non-Markovian dynamics in superconducting architectures, paving the way for robust quantum platforms with enhanced correlations, suitable for scalable quantum computing and secure communication systems.</div></div>\",\"PeriodicalId\":9764,\"journal\":{\"name\":\"Chaos Solitons & Fractals\",\"volume\":\"201 \",\"pages\":\"Article 117331\"},\"PeriodicalIF\":5.6000,\"publicationDate\":\"2025-10-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chaos Solitons & Fractals\",\"FirstCategoryId\":\"100\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S096007792501344X\",\"RegionNum\":1,\"RegionCategory\":\"数学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATHEMATICS, INTERDISCIPLINARY APPLICATIONS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chaos Solitons & Fractals","FirstCategoryId":"100","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S096007792501344X","RegionNum":1,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATHEMATICS, INTERDISCIPLINARY APPLICATIONS","Score":null,"Total":0}
Time fractional evolution of two superconducting charge qubits
We investigate the quantum correlation dynamics between two superconducting charge qubits (TSC-Q), governed by the time-fractional Schrödinger equation (TFSE), a framework incorporating non-Markovian memory effects arising from environmental interactions. By analyzing separable and partially entangled initial states, we highlight the central role of the fractional order , Josephson energies (, ), and coupling strength () in modulating concurrence, quantum steering asymmetry, and Bell nonlocality (via the CHSH inequality). Our results indicate that a decrease in the value of promotes a faster generation of quantum correlations for separable and partially entangled states, highlighting the dual role of as both a catalyst and a stabilizer of quantum resources. Furthermore, it is important to note that optimal behavior of quantum correlations is observed when the Josephson energies of the two qubits are close, i.e., when . In addition, a stronger coupling strength, denoted by , further enhances the generation of these correlations. The synergy among , , , and defines a tunable parameter space for engineering memory-driven correlations to mitigate decoherence. These results position the TFSE as a promising tool for modeling non-Markovian dynamics in superconducting architectures, paving the way for robust quantum platforms with enhanced correlations, suitable for scalable quantum computing and secure communication systems.
期刊介绍:
Chaos, Solitons & Fractals strives to establish itself as a premier journal in the interdisciplinary realm of Nonlinear Science, Non-equilibrium, and Complex Phenomena. It welcomes submissions covering a broad spectrum of topics within this field, including dynamics, non-equilibrium processes in physics, chemistry, and geophysics, complex matter and networks, mathematical models, computational biology, applications to quantum and mesoscopic phenomena, fluctuations and random processes, self-organization, and social phenomena.