Communications in Theoretical Physics最新文献_第7页

Holographic Dark Energy in Non-conserved Gravity Theory 非守恒引力理论中的全息暗能量

Communications in Theoretical Physics Pub Date : 2024-03-07 DOI: 10.1088/1572-9494/ad30f6

H. Fazlollahi

引用次数: 0

Hybrid rogue waves and breather solutions on the double-periodic background for the Kundu-DNLS equation 昆都-DNLS方程双周期背景上的混合流氓波和呼吸解

Communications in Theoretical Physics Pub Date : 2024-03-01 DOI: 10.1088/1572-9494/ad2f24

Dongzhu Jiang, Q. Zhaqilao

引用次数: 0

Two-Component Dimers of Ultracold Atoms with Center-of-Mass-Momentum Dependent Interaction 超冷原子的双分量二聚体与质量中心动量相关的相互作用

Communications in Theoretical Physics Pub Date : 2024-02-27 DOI: 10.1088/1572-9494/ad2d52

Yaru Liu, Shuangshuang Yang, Peng Zhang

{"title":"Two-Component Dimers of Ultracold Atoms with Center-of-Mass-Momentum Dependent Interaction","authors":"Yaru Liu, Shuangshuang Yang, Peng Zhang","doi":"10.1088/1572-9494/ad2d52","DOIUrl":"https://doi.org/10.1088/1572-9494/ad2d52","url":null,"abstract":"\u0000 In a previous work [Phys. Rev. A 95, 060701(R) (2017)] we show that a new type of twobody interaction, which depends on the center of mass (CoM) momentum, can be realized for ultracold atoms via laser-modulated magnetic Feshbach resonance (MFR). Further studies (e.g., L. He et. al., Phys. Rev. Lett. 120, 045302 (2018)) show that various interesting phenomena, such as Fulde-Ferrell superfluids, can be induced by the scattering between ultracold atoms with this interaction. In this work we investigate the shallow bound states of two ultracold atoms with this type of interaction. We show that when the magnetic field B is below the MFR point B0, two shallow bound states can appear in this system. Namely, a “two-component dimer” or a dimer with pseudo-spin 1/2 can be formed by two atoms. Furthermore, the dispersion curve of the dimer may has either single or double minimums in the CoM momentum space. The latter case can be explained as a result from significant pseudo-spin-orbital coupling (SOC) effects. Our results show that the ultracold gases with CoM momentum dependent interaction may be a candidate for quantum simulations with ultracold two-component molecules, especially the molecule gases with SOC.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140427810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrical characteristics of fractional order 3×n Fan network 分数阶 3×n 扇形网络的电气特性

Communications in Theoretical Physics Pub Date : 2024-02-23 DOI: 10.1088/1572-9494/ad2c81

Zhi-zhong Tan, xin wang

引用次数: 0

An adaptive energy regulation in a memristive map linearized from circuit with two memristive channels 具有两个记忆通道的记忆图线性化电路中的自适应能量调节器

Communications in Theoretical Physics Pub Date : 2024-02-05 DOI: 10.1088/1572-9494/ad260e

Feifei Yang, Ping Zhou, Jun Ma

{"title":"An adaptive energy regulation in a memristive map linearized from circuit with two memristive channels","authors":"Feifei Yang, Ping Zhou, Jun Ma","doi":"10.1088/1572-9494/ad260e","DOIUrl":"https://doi.org/10.1088/1572-9494/ad260e","url":null,"abstract":"\u0000 The nonlinear circuits can show multistability when magnetic flux-dependent memristor (MFDM) or charge-sensitive memristor (CSM) is incorporated into one branch circuit, which is helpful for estimating magnetic or electric field effects. In this paper, two different kinds of memristors are incorporated into two branch circuits composed of a capacitor and a nonlinear resistor, thus a memristive circuit with double memristive channels is designed. The circuit equations are presented, and the dynamics in this oscillator with two memristive terms are discussed. Then the memristive oscillator is converted into a memristive map by applying linear transformation on the sampled time series for memristive oscillator. The Hamilton energy function for the memristive oscillator is obtained by using the Helmholtz theorem, and it can be mapped from the field energy of the memristive circuit. An energy function for the dual memristive map is suggested by imposing suitable weights on the discrete energy function. The dynamical behaviors of the new memristive map are investigated, and an adaptive law is proposed to regulate the firing mode in the memristive map. This work will provide theoretical basis and experimental guidance for oscillator-to-map transformation and discrete map energy calculation.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139803382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An adaptive energy regulation in a memristive map linearized from circuit with two memristive channels 具有两个记忆通道的记忆图线性化电路中的自适应能量调节器

Communications in Theoretical Physics Pub Date : 2024-02-05 DOI: 10.1088/1572-9494/ad260e

Feifei Yang, Ping Zhou, Jun Ma

{"title":"An adaptive energy regulation in a memristive map linearized from circuit with two memristive channels","authors":"Feifei Yang, Ping Zhou, Jun Ma","doi":"10.1088/1572-9494/ad260e","DOIUrl":"https://doi.org/10.1088/1572-9494/ad260e","url":null,"abstract":"\u0000 The nonlinear circuits can show multistability when magnetic flux-dependent memristor (MFDM) or charge-sensitive memristor (CSM) is incorporated into one branch circuit, which is helpful for estimating magnetic or electric field effects. In this paper, two different kinds of memristors are incorporated into two branch circuits composed of a capacitor and a nonlinear resistor, thus a memristive circuit with double memristive channels is designed. The circuit equations are presented, and the dynamics in this oscillator with two memristive terms are discussed. Then the memristive oscillator is converted into a memristive map by applying linear transformation on the sampled time series for memristive oscillator. The Hamilton energy function for the memristive oscillator is obtained by using the Helmholtz theorem, and it can be mapped from the field energy of the memristive circuit. An energy function for the dual memristive map is suggested by imposing suitable weights on the discrete energy function. The dynamical behaviors of the new memristive map are investigated, and an adaptive law is proposed to regulate the firing mode in the memristive map. This work will provide theoretical basis and experimental guidance for oscillator-to-map transformation and discrete map energy calculation.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139863268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stability analysis of a time‑delayed Van der Pol-Helmholtz-Duffing oscillatorin fractal space with a non‑perturbative approach 用非微扰方法对分形空间中的延时范德波尔-赫尔姆霍兹-杜芬振荡器进行稳定性分析

Communications in Theoretical Physics Pub Date : 2024-02-02 DOI: 10.1088/1572-9494/ad2501

Y. El‐Dib

{"title":"Stability analysis of a time‑delayed Van der Pol-Helmholtz-Duffing oscillatorin fractal space with a non‑perturbative approach","authors":"Y. El‐Dib","doi":"10.1088/1572-9494/ad2501","DOIUrl":"https://doi.org/10.1088/1572-9494/ad2501","url":null,"abstract":"\u0000 The time-delayed fractal Van der Pol-Helmholtz-Duffing (VPHD) oscillator is the subject of this paper, which explores its mechanisms and highlights its stability analysis. While time-delayed technologies are currently garnering significant attention, the focus of this research remains crucially relevant. A non-perturbative approach is employed to refine and set the stage for the system under scrutiny. The innovative methodologies introduced yield an equivalent linear differential equation, mirroring the inherent nonlinearities of the system. Notably, the incorporation of quadratic nonlinearity into the frequency formula represents a cutting-edge advancement. The analytical solution's validity is corroborated using a numerical approach. Stability conditions are ascertained through the residual Galerkin method. Intriguingly, it is observed that the delay parameter, in the context of the fractal system, reverses its stabilizing influence, impacting both the amplitude of delayed velocity and position. The analytical solution's precision is underscored by its close alignment with numerical results. Furthermore, the study reveals that fractal characteristics emulate damping behaviors. Given its applicability across diverse nonlinear dynamical systems, this non-perturbative approach emerges as a promising avenue for future research.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139871214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stability analysis of a time‑delayed Van der Pol-Helmholtz-Duffing oscillatorin fractal space with a non‑perturbative approach 用非微扰方法对分形空间中的延时范德波尔-赫尔姆霍兹-杜芬振荡器进行稳定性分析

Communications in Theoretical Physics Pub Date : 2024-02-02 DOI: 10.1088/1572-9494/ad2501

Y. El‐Dib

{"title":"Stability analysis of a time‑delayed Van der Pol-Helmholtz-Duffing oscillatorin fractal space with a non‑perturbative approach","authors":"Y. El‐Dib","doi":"10.1088/1572-9494/ad2501","DOIUrl":"https://doi.org/10.1088/1572-9494/ad2501","url":null,"abstract":"\u0000 The time-delayed fractal Van der Pol-Helmholtz-Duffing (VPHD) oscillator is the subject of this paper, which explores its mechanisms and highlights its stability analysis. While time-delayed technologies are currently garnering significant attention, the focus of this research remains crucially relevant. A non-perturbative approach is employed to refine and set the stage for the system under scrutiny. The innovative methodologies introduced yield an equivalent linear differential equation, mirroring the inherent nonlinearities of the system. Notably, the incorporation of quadratic nonlinearity into the frequency formula represents a cutting-edge advancement. The analytical solution's validity is corroborated using a numerical approach. Stability conditions are ascertained through the residual Galerkin method. Intriguingly, it is observed that the delay parameter, in the context of the fractal system, reverses its stabilizing influence, impacting both the amplitude of delayed velocity and position. The analytical solution's precision is underscored by its close alignment with numerical results. Furthermore, the study reveals that fractal characteristics emulate damping behaviors. Given its applicability across diverse nonlinear dynamical systems, this non-perturbative approach emerges as a promising avenue for future research.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139811382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Black hole evaporation and its remnants with the generalized uncertainty principle including a linear term 包含线性项的广义不确定性原理下的黑洞蒸发及其残留物

Communications in Theoretical Physics Pub Date : 2024-01-05 DOI: 10.1088/1572-9494/ad1b49

Bo Yu, Zheng-Wen Long

{"title":"Black hole evaporation and its remnants with the generalized uncertainty principle including a linear term","authors":"Bo Yu, Zheng-Wen Long","doi":"10.1088/1572-9494/ad1b49","DOIUrl":"https://doi.org/10.1088/1572-9494/ad1b49","url":null,"abstract":"\u0000 In recent years, researchers have investigated the evaporation of Schwarzschild black holes using various forms of the generalized uncertainty principle (GUP), metric quantum correction, and non-commutative geometry, respectively. However, there are differences between the GUP correction and the other two methods in terms of describing the later stages of black hole evaporation. Furthermore, some studies argue that the GUP with a negative parameter cannot effectively correct for black hole evaporation, while others contend that the positivity or negativity of the GUP parameters should not affect the correction results. Taking the above into consideration, we reconsider black hole evaporation with the generalized uncertainty principle including a linear term (LGUP), and examine the case of negative parameters. The results indicate that the evaporation behavior of both Schwarzschild black holes and Reissner-Nordström black holes, under LGUP correction, is consistent with the results of metric quantum correction and non-commutative geometry. Additionally, the negative parameter LGUP can also effectively correct for black hole evaporation.","PeriodicalId":508917,"journal":{"name":"Communications in Theoretical Physics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139383864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrability and solutions of a nonsymmetric discrete Korteweg-de Vries equation 非对称离散 Korteweg-de Vries 方程的可积分性和解

Communications in Theoretical Physics Pub Date : 2024-01-05 DOI: 10.1088/1572-9494/ad1b4a

Maebel Mesfun, Da-jun Zhang, Song-lin Zhao

引用次数: 0