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Communications in Theoretical Physics最新文献

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Construction of conservation laws for the Gardner equation, Landou-Ginburg-Higgss equation, and Hirota-Satsuma equation 构建加德纳方程、朗杜-金伯格-希格斯方程和广田-萨摩方程的守恒定律
3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2024-01-02 DOI: 10.1088/1572-9494/ad19d6
Chengmin Chen, Faiza Afzal, Yufeng Zhang
{"title":"Construction of conservation laws for the Gardner equation, Landou-Ginburg-Higgss equation, and Hirota-Satsuma equation","authors":"Chengmin Chen, Faiza Afzal, Yufeng Zhang","doi":"10.1088/1572-9494/ad19d6","DOIUrl":"https://doi.org/10.1088/1572-9494/ad19d6","url":null,"abstract":"\u0000 In this paper, two different methods for calculating the conservation laws are used, which are the direct construction of conservation laws and the conservation laws proposed by Ibragimov. Using the above two methods, we obtain the conserva tion laws of Gardner equation, Landou-Ginburg-Higgss equation and Hirota-Satsuma equation, respectively.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139452968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced quantum resources via two distant atom-cavity systems under the influence of atomic dissipation 原子耗散影响下通过两个遥远的原子腔系统增强量子资源
3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2024-01-02 DOI: 10.1088/1572-9494/ad19d5
M. Setodeh Kheirabady, M. Tavassoly, Mehran Rafeie, E. Ghasemian
{"title":"Enhanced quantum resources via two distant atom-cavity systems under the influence of atomic dissipation","authors":"M. Setodeh Kheirabady, M. Tavassoly, Mehran Rafeie, E. Ghasemian","doi":"10.1088/1572-9494/ad19d5","DOIUrl":"https://doi.org/10.1088/1572-9494/ad19d5","url":null,"abstract":"\u0000 Quantum resources such as entanglement and coherence are the holy grail for modern quantum technologies. Although the unwanted environmental effects tackle quantum information processing tasks, {color{blue}suprisingly} these key quantum resources may be protected and even enhanced by the implementation of some special hybrid open quantum systems. {color{blue} Here, we aim to show that how a dissipative atom-cavity-system can be accomplished to generate enhanced quantum resources.} To do so, we consider a couple of dissipative cavities, where each one contains two effective two-level atoms interacting with a single-mode cavity field. {color{blue} In practical applications, a classical laser field may be applied to drive each atomic subsystem. After driving the system, a Bell-state measurement (BSM) is performed on the output of the system to quantify the entanglement and coherence. } The obtained results reveal that the remote entanglement and coherence between the atoms existing inside the two distant cavities not only enhanced, but can be stabilized, even under the action of dissipation. In contrast, the local entanglement between two atoms inside each dissipative cavity attenuates due to the presence of unwanted environmental effects. Nevertheless, the local coherence may show the same behavior as the remote coherence. {color{blue} Besides, the system provides the steady state entanglement in various interaction regimes, particularly in the strong atom-cavity coupling and with the relatively large detuning. More interestingly, our numerical analyses demonstrate that the system may show memory effect due top the fact that the death and revival of entanglement take place during the interaction.} Our proposed model may find potential applications for the implementation of long distance quantum networks. In particular, it facilitates the distribution of quantum resources between the nodes of large-scale quantum networks for secure communication. ","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139452790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Consequences of Renyi Entropy on the Thermal Geometries andHawking Evaporation of Topological Dyonic Dilaton Black Hole 仁义熵对拓扑迪拉顿黑洞热几何和霍金蒸发的影响
IF 3.1 3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-12-29 DOI: 10.1088/1572-9494/ad1987
Muhammad Yasir, Shahid Chaudhary, Tiecheng Xia
{"title":"Consequences of Renyi Entropy on the Thermal Geometries andHawking Evaporation of Topological Dyonic Dilaton Black Hole","authors":"Muhammad Yasir, Shahid Chaudhary, Tiecheng Xia","doi":"10.1088/1572-9494/ad1987","DOIUrl":"https://doi.org/10.1088/1572-9494/ad1987","url":null,"abstract":"The thermodynamics of black holes has had a profound impact on theoretical physics, providing insights into the nature of gravity, the quantum structure of spacetime, and the fundamental laws governing the universe. In this work, we study thermal geometries and Hawking evaporation of recently proposed topological dyonic dilaton black hole in AdS space. We consider Renyi entropy and obtain the relations for pressure, heat capacity and Gibbs free energy and observe that the Renyi parameter and dilaton ¯eld has vital role on the phase transition and stability of the BH. Moreover, we use Weinhold, Ruppeiner and Hendi Panahiyah Eslam Momennia models to evaluate scalar curvature of the BH and ¯nd out that the divergence points of the scalar curvature coincides with the zero of speci¯c heat. Finally using Stefan-Boltzmann law, we analyze that black hole without dilaton ¯eld evaporate far more quickly as compare to dilaton black hole in AdS space.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139145907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The modeling non-sequential double ionization of helium under high-intensity femtosecond laser pulses with shielding charge approximation 用屏蔽电荷近似法模拟高强度飞秒激光脉冲下氦的非连续双重电离
IF 3.1 3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-12-29 DOI: 10.1088/1572-9494/ad1989
Marjan Zakavi, Mohammad sabaeian
{"title":"The modeling non-sequential double ionization of helium under high-intensity femtosecond laser pulses with shielding charge approximation","authors":"Marjan Zakavi, Mohammad sabaeian","doi":"10.1088/1572-9494/ad1989","DOIUrl":"https://doi.org/10.1088/1572-9494/ad1989","url":null,"abstract":"In this study, we successfully extracted the \"knee structure\" for non-sequential double ionization (NSDI) in the helium atom. To achieve this, for the first time, we solved the time-dependent Schrödinger equation in three dimensions for the helium atom, utilizing the shielding charge approximation. Our findings corroborate prior observations by Wang et al. [Wang and Eberly, PRL 105, 083001 (2010)], demonstrating that NSDI occurs within a narrower time window in circular polarization compared to linear polarization. As a result, the yield of linear polarization was higher than that of circular polarization, aligning with the previously reported results. Notably, in the case of circular polarization, the time window further narrows with increasing intensity, attributed to a decrease in the time-of-flight.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2023-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139146380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Accuracy of numerical relativity waveforms with respect to space-based gravitational wave detectors 天基引力波探测器的数值相对论波形精度
IF 3.1 3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-12-22 DOI: 10.1088/1572-9494/ad1824
Zun Wang, Junjie Zhao, Zhoujian Cao
{"title":"Accuracy of numerical relativity waveforms with respect to space-based gravitational wave detectors","authors":"Zun Wang, Junjie Zhao, Zhoujian Cao","doi":"10.1088/1572-9494/ad1824","DOIUrl":"https://doi.org/10.1088/1572-9494/ad1824","url":null,"abstract":"The same to laser interferometer gravitational-wave observatory (LIGO), matched filtering technique will be critical to data analysis of gravitational wave detection by space-based detectors including LISA, Taiji and Tianqin. Waveform templates are basis for such matched filtering technique. In order to construct ready-to-use waveform templates, numerical relativity waveforms are start point. So the accuracy issue of numerical relativity waveforms is critically important. There are many investigations about this issue with respect to LIGO. But unfortunately there are few results on this issue with respect to space-based detectors. The current paper investigates this problem. Our results indicate that the existing numerical relativity waveforms are as accurate as 99% with respect to space-based detectors including LISA, Taiji and Tianqin. Such accuracy level is comparable to the one with respect to LIGO.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139166070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Particle dynamics, black hole shadow and weak gravitational lensing in the f (Q) theory of gravity 引力 f (Q) 理论中的粒子动力学、黑洞阴影和弱引力透镜
IF 3.1 3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-12-20 DOI: 10.1088/1572-9494/ad0e05
Allah Ditta, Xia Tiecheng, Farruh Atamurotov, Ibrar Hussain, G Mustafa
{"title":"Particle dynamics, black hole shadow and weak gravitational lensing in the f (Q) theory of gravity","authors":"Allah Ditta, Xia Tiecheng, Farruh Atamurotov, Ibrar Hussain, G Mustafa","doi":"10.1088/1572-9494/ad0e05","DOIUrl":"https://doi.org/10.1088/1572-9494/ad0e05","url":null,"abstract":"We study the particle dynamics around a black hole (BH) in <italic toggle=\"yes\">f</italic>(<italic toggle=\"yes\">Q</italic>) gravity. First, we investigate the influence of the parameters of <italic toggle=\"yes\">f</italic>(<italic toggle=\"yes\">Q</italic>) gravity on the horizon structure of the BH, photon orbits and the radius of the innermost stable circular orbit (ISCO) of massive particles. We further study the effects of the parameters of <italic toggle=\"yes\">f</italic>(<italic toggle=\"yes\">Q</italic>) gravity on the shadow cast by the BH. Moreover, we consider weak gravitational lensing using the general method, where we also explore the deflection angle of light rays around the BH in <italic toggle=\"yes\">f</italic>(<italic toggle=\"yes\">Q</italic>) gravity in uniform and nonuniform plasma mediums.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139055930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Disassociation of a one-dimensional cold molecule via quantum scattering 通过量子散射解离一维冷分子
IF 3.1 3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-12-20 DOI: 10.1088/1572-9494/ad0f8d
Wen-Liang Li, Hai-Jing Song, Tie-Ling Song, D L Zhou
{"title":"Disassociation of a one-dimensional cold molecule via quantum scattering","authors":"Wen-Liang Li, Hai-Jing Song, Tie-Ling Song, D L Zhou","doi":"10.1088/1572-9494/ad0f8d","DOIUrl":"https://doi.org/10.1088/1572-9494/ad0f8d","url":null,"abstract":"Motivated by the recent experimental developments in ultracold molecules and atoms, we propose a simple theoretical model to address the disassociation, reflection, and transmission probability of a one-dimensional cold molecule via quantum scattering. First, we show the Born approximation results in the weak interaction regime. Then, by employing the Lippmann–Schwinger equation, we give the numerical solution and investigate the disassociation’s dependence on the injection momentum and the interaction strengths. We find that the maximum disassociation rate has a limit when increasing the interaction strengths and injection momentum. We expect that our model can be realized in experiments in the near future.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139055894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The influence of a self-focused laser beam on the stimulated Raman scattering process in collisional plasma 自聚焦激光束对碰撞等离子体中受激拉曼散射过程的影响
IF 3.1 3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-12-20 DOI: 10.1088/1572-9494/ad10fe
Keshav Walia, Taranjot Singh
{"title":"The influence of a self-focused laser beam on the stimulated Raman scattering process in collisional plasma","authors":"Keshav Walia, Taranjot Singh","doi":"10.1088/1572-9494/ad10fe","DOIUrl":"https://doi.org/10.1088/1572-9494/ad10fe","url":null,"abstract":"The influence of a self-focused beam on the stimulated Raman scattering (SRS) process in collisional plasma is explored. Here, collisional nonlinearity arises as a result of non-uniform heating, thereby causing carrier redistribution. The plasma density profile gets modified in a perpendicular direction to the main beam axis. This modified plasma density profile greatly affects the pump wave, electron plasma wave (EPW) and back-scattered wave. The well-known paraxial theory and Wentzel–Kramers–Brillouin approximation are used to derive second-order ordinary differential equations for the beam waists of the pump wave, EPW and the scattered wave. Further to this, the well-known fourth-order Runge–Kutta method is used to carry out numerical simulations of these equations. SRS back-reflectivity is found to increase due to the focusing of several waves involved in the process.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139056009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stable bulk nanobubbles can be regarded as gaseous analogues of microemulsions 稳定的散装纳米气泡可视为微乳液的气态类似物
IF 3.1 3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-12-20 DOI: 10.1088/1572-9494/ad109c
Changsheng Chen, Hongguang Zhang, Xianren Zhang
{"title":"Stable bulk nanobubbles can be regarded as gaseous analogues of microemulsions","authors":"Changsheng Chen, Hongguang Zhang, Xianren Zhang","doi":"10.1088/1572-9494/ad109c","DOIUrl":"https://doi.org/10.1088/1572-9494/ad109c","url":null,"abstract":"In our previous work [2022 <italic toggle=\"yes\">Phys. Chem. Chem. Phys</italic>. <bold>24</bold> 9685], we used molecular dynamics simulations to show that bulk nanobubbles can be stabilized by forming a compressed amphiphile monolayer at bubble interfaces. This observation closely matches the origin of stability of microemulsions and inspired us to propose here that, in certain cases, stable bulk nanobubbles can be regarded as gaseous analogues of microemulsions: the nanobubble phase and the bubble-containing solution phase coexist with the external gas phase. This three-phase coexistence is then validated by molecular dynamics simulations. The stability mechanism for bulk nanobubbles is thus given: the formation of a compressed amphiphilic monolayer because of microbubble shrinking leads to a vanishing surface tension, and consequently the curvature energy of the monolayer dominates the thermodynamic stability of bulk nanobubbles. With the monolayer model, we further interpret several strange behaviors of bulk nanobubbles: gas supersaturation is not a prerequisite for nanobubble stability because of the vanishing surface tension, and the typical nanobubble size of 100 nm can be explained through the small bending constant of the monolayer. Finally, through analyzing the compressed amphiphile monolayer model we propose that bulk nanobubbles can exist ubiquitously in aqueous solutions.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139051217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A significantly enhanced magnetic moment due to an electric dipole moment 因电偶极矩而明显增强的磁矩
IF 3.1 3区 物理与天体物理
Communications in Theoretical Physics Pub Date : 2023-12-20 DOI: 10.1088/1572-9494/ad0f15
Zhening Fang, Jian-Hua Jiang, Haiping Fang
{"title":"A significantly enhanced magnetic moment due to an electric dipole moment","authors":"Zhening Fang, Jian-Hua Jiang, Haiping Fang","doi":"10.1088/1572-9494/ad0f15","DOIUrl":"https://doi.org/10.1088/1572-9494/ad0f15","url":null,"abstract":"We demonstrate via first-principle calculations based on the density functional theory that the magnetic moment of a helium atom under a given magnetic field has a positive correlation with the electric dipole moment when an external electric field is applied to the system. Our calculation shows that the enhancement of the magnetic moment is significant due to the reduction of the triplet-singlet splitting. We argue that this finding can be generalized to organic molecules, especially to macromolecules where the structure induced an electric dipole moment which may give rise to significantly enhanced responses to the external magnetic field. These results suggest that considerable magnetic responses prevail, particularly in bio-molecules without an inversion center.","PeriodicalId":10641,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139055971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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