Classical and Quantum Gravity最新文献_第5页

Newman–Penrose-like exact and approximate conservation laws: a covariant and conformal formulation 类纽曼-彭罗斯精确和近似守恒定律：一个协变和保形公式

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-03-24 DOI: 10.1088/1361-6382/ae4e10

Berend Schneider

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Analytical calculation of self-force effects on a scalar particle in an eccentric orbit around a Schwarzschild black hole 史瓦西黑洞偏心轨道上标量粒子自力效应的解析计算

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-03-24 DOI: 10.1088/1361-6382/ae5145

Salvatore Capozziello, Nicola Menadeo and Davide Usseglio

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A purely geometric field theory unifying gravity and electromagnetism in absolute parallelism * 一个纯几何场论统一重力和电磁在绝对平行*

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-03-23 DOI: 10.1088/1361-6382/ae50c5

Mona M Foda and Ebtsam H Taha

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A passive UV-based system for discharging the test masses of ground-based gravitational wave detectors 一种用于释放地面引力波探测器测试质量的被动紫外系统

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-03-23 DOI: 10.1088/1361-6382/ae50c4

S Buchman, B T Lanz, S Wang and S Saraf

{"title":"A passive UV-based system for discharging the test masses of ground-based gravitational wave detectors","authors":"S Buchman, B T Lanz, S Wang and S Saraf","doi":"10.1088/1361-6382/ae50c4","DOIUrl":"https://doi.org/10.1088/1361-6382/ae50c4","url":null,"abstract":"We present a passive (i.e. not requiring feedback) ultraviolet (UV) charge management system for the fused silica test masses (TMs) in ground-based laser interferometric gravitational wave detectors. The system uses photoelectron emission from low work-function gold (Au) coatings illuminated by 275–285 nm UV light to neutralize unwanted electric charge on electrically floating TMs, maintaining them at zero potential relative to surrounding components. Two implementation schemes are described: (1) distributed discharge of the TM tabs (TMT) illuminated by UV LEDs mounted at the eight surrounding earthquake stops, and (2) a conductively linked TMT design enabling centralized discharge on the TM barrel, with potential extension to annular coatings around the high-reflectivity and anti-reflective surfaces. Experimental results show photoelectric currents ⩾10 pA for 1.0 mW of incident UV, enabling discharge rates ⩾10 V s−1 for a 1 pF capacitor. With 0.2 mW UV power, charge neutralization of the TM conductive areas to ⩽1 pC can be achieved in less than 5–75 min; where the TM maximal potential and capacitance to ground are calculated values that include a combined safety margin of about one order of magnitude. This technique offers a vacuum-compatible alternative to ion sprayers, significantly reducing operational downtime, though not addressing the discharge of the TM dielectric surfaces. For the conductive-barrel configuration, we also propose a balanced electrostatic actuator using four parallel-plate capacitors for combined control of TM axial displacement, tilt, and azimuth, with reduced drive voltages.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"52 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147495309","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

Constraining the cosmological evolution of post-Newtonian parameters with gravitational wave signals from compact binary inspirals 用紧致双星涡旋引力波信号约束后牛顿参数的宇宙学演化

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-03-23 DOI: 10.1088/1361-6382/ae50a3

Oliver Pitt and Timothy Clifton

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Accelerating numerical relativity simulations with new multistep fourth-order Runge–Kutta methods 用新的多步四阶龙格-库塔方法加速数值相对论模拟

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-03-23 DOI: 10.1088/1361-6382/ae4da2

Lucas Timotheo Sanches, Steven Robert Brandt, Jay Kalinani, Liwei Ji and Erik Schnetter

{"title":"Accelerating numerical relativity simulations with new multistep fourth-order Runge–Kutta methods","authors":"Lucas Timotheo Sanches, Steven Robert Brandt, Jay Kalinani, Liwei Ji and Erik Schnetter","doi":"10.1088/1361-6382/ae4da2","DOIUrl":"https://doi.org/10.1088/1361-6382/ae4da2","url":null,"abstract":"Many HPC applications that solve differential equations rely on the Runge–Kutta (RK) family of methods for time integration. Among these methods, the fourth-order accurate RK4 scheme is especially popular. This time integration scheme requires applications to evaluate four intermediate stages to take one time step. Depending on the complexity of the problem being solved, the evaluation of these intermediate stages can be computationally expensive. In this paper we develop explicit fourth-order accurate multistep RK methods. The advantage of such methods is that they re-use data from previous time steps, thus requiring fewer intermediate stage evaluations and potentially speeding up applications. We outline a procedure to obtain and tune the method’s coefficients by adjusting their stability regions in an attempt to maximize the size that a time step can take. We validate and evaluate our new methods in the context of numerical relativity applications using the EinsteinToolkit. We believe, however, that these methods and results should generalize to other applications using explicit RK methods.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"57 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147495307","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

Regular black holes in spacetimes with a cosmological horizon: from de Sitter to general asymptotics 具有宇宙视界的时空中的规则黑洞：从德西特到一般渐近性

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-03-19 DOI: 10.1088/1361-6382/ae4f4d

Yi-Bo Liang and Hong-Rong Li

引用次数: 0

On frequency plans for TianQin 关于天琴的频率计划

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-03-19 DOI: 10.1088/1361-6382/ae4f4c

Wanqin Li, Dezhi Wang, Xuefeng Zhang and Hui-Zong Duan

{"title":"On frequency plans for TianQin","authors":"Wanqin Li, Dezhi Wang, Xuefeng Zhang and Hui-Zong Duan","doi":"10.1088/1361-6382/ae4f4c","DOIUrl":"https://doi.org/10.1088/1361-6382/ae4f4c","url":null,"abstract":"In the space-based gravitational wave detection of the TianQin mission, gravitational perturbations from the Earth–Moon system induce relative motion between the satellites ( m s−1), leading to a Doppler effect in the inter-satellite laser links. In heterodyne laser interferometry, the Doppler shift causes the beatnote frequencies to drift slowly over time, potentially exceeding the phase read-out bandwidth and resulting in loss of phase locking. Therefore, various frequency plans have been proposed to lock all lasers to a primary laser, which ensures that the beatnote frequencies remain within the phase read-out bandwidth throughout missions. Frequency plans for TianQin must take into account multiple clock sidebands, prevent beatnote signal crosstalk, and maintain frequency separations of 0.5 MHz. On top of the straightforward fixed-offset scheme, this paper proposes a Doppler-compensated scheme, where the frequency offsets are dynamically adjusted according to the Doppler shift, utilizing the precision orbit determination and prediction capability of TianQin. In contrast to the fixed-offset scheme, the Doppler-compensated scheme can halve the variation range of the beatnote frequencies and provides sufficient margin for the phase read-out bandwidth for all 36 laser locking configurations considered in the paper.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"12 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147478835","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

Comment on ‘Ideal clocks—a convenient fiction’ 评《理想时钟——方便的虚构》

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-03-19 DOI: 10.1088/1361-6382/ae4283

Vladimir Toussaint

引用次数: 0

Higher curvature corrections to the black hole Wheeler–DeWitt equation and the annihilation to nothing scenario 更高曲率修正黑洞惠勒-德维特方程和湮灭为零的情景

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-03-18 DOI: 10.1088/1361-6382/ae4d9f

Takamasa Kanai

引用次数: 0