Classical and Quantum Gravity最新文献_第8页

A meta inspiral–merger–ringdown consistency test of general relativity with gravitational wave signals from compact binaries 广义相对论与紧致双星引力波信号的元启发-合并-环衰一致性检验

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-08-13 DOI: 10.1088/1361-6382/adf02a

Sakshi Satish Madekar, Nathan K Johnson-McDaniel, Anuradha Gupta and Abhirup Ghosh

{"title":"A meta inspiral–merger–ringdown consistency test of general relativity with gravitational wave signals from compact binaries","authors":"Sakshi Satish Madekar, Nathan K Johnson-McDaniel, Anuradha Gupta and Abhirup Ghosh","doi":"10.1088/1361-6382/adf02a","DOIUrl":"https://doi.org/10.1088/1361-6382/adf02a","url":null,"abstract":"The observation of gravitational waves from compact binary coalescences is a promising tool to test the validity of general relativity (GR) in a highly dynamical strong-field regime. There are now a variety of tests of GR performed on the observed compact binary signals. In this paper, we propose a new test of GR that compares the results of these individual tests. This meta inspiral–merger–ringdown consistency test (IMRCT) involves inferring the final mass and spin of the remnant black hole obtained from the analyses of two different tests of GR and checking for consistency. If there is a deviation from GR, we expect that different tests of GR will recover different values for the final mass and spin, in general. We check the performance of the meta IMRCT using a standard set of null tests used in various gravitational-wave analyses: the original IMRCT, the test infrastructure for GR, the flexible-theory-independent test, and the modified dispersion test. However, the meta IMRCT is applicable to any tests of GR that infer the initial masses and spins or the final mass and spin, including ones that are applied to binary neutron star or neutron star–black hole signals. We apply the meta IMRCT to simulated quasi-circular GR and non-GR binary black hole (BBH) signals as well as to eccentric BBH signals in GR (analysed with quasicircular waveforms). We find that the meta IMRCT gives consistency with GR for the quasi-circular GR signals and picks up a deviation from GR in the other cases, as do other tests. In some cases, the meta IMRCT finds a significant GR deviation for a given pair of tests (and specific testing parameters) while the individual tests do not, showing that it is more sensitive than the individual tests to certain types of deviations. In addition, we also apply this test to a few selected real compact binary signals and find them consistent with GR.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"27 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144839978","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

Suppression of low-frequency noise using discrete component chopping noise suppression circuit for space inertial sensor drive voltage amplifier 空间惯性传感器驱动电压放大器中离散分量斩波噪声抑制电路的低频噪声抑制

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-08-13 DOI: 10.1088/1361-6382/adf794

Shuyang Lin, Jiawei Zhang, Chong Mo, Zhe Han, Peilong Yu, Qinbo Ma, Ming Hu and Jianping Huang

{"title":"Suppression of low-frequency noise using discrete component chopping noise suppression circuit for space inertial sensor drive voltage amplifier","authors":"Shuyang Lin, Jiawei Zhang, Chong Mo, Zhe Han, Peilong Yu, Qinbo Ma, Ming Hu and Jianping Huang","doi":"10.1088/1361-6382/adf794","DOIUrl":"https://doi.org/10.1088/1361-6382/adf794","url":null,"abstract":"The space inertial sensor represents a pivotal component of the space gravitational wave detection apparatus, whereas the test mass (TM) it contains serves as a pivotal reference for space gravitational wave detection. The actuation circuit maintains the TM at a fixed position within the space inertia sensor. The Drive Voltage Amplifier (DVA) of the actuation circuit introduces low-frequency noise that directly affects the accuracy of gravitational wave detection at the mHz frequency. Therefore, it is of great significance to suppress low-frequency noise in the DVA. This study analyzes the noise modeling of the DVA in the actuation circuit and points out that the low-frequency noise of the DVA is mainly 1/f noise. A set of chopping noise suppression circuits is designed to greatly suppress the noise floor of the DVA under the premise of ensuring the functionality of the circuit. Based on chopping technology, a set of chopping noise suppression circuits is designed, and a prototype circuit was constructed for experimental analysis. The test results show that the noise floor of the DVA circuit at 1 mHz had been reduced from 21.7 ± 1.51 μV √Hz−1 to 1.35 ± 0.22 μV √Hz−1, which notably diminished the noise floor of the DVA circuit and can be applied to the design of future actuation circuit for the space inertial sensor.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"69 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144839985","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 transition to phenomenological behaviour of static solutions of the Einstein–Dirac system for an increasing number of fermions 增加费米子数量时爱因斯坦-狄拉克系统静态解向现象学行为的转变

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-08-13 DOI: 10.1088/1361-6382/adf792

Håkan Andréasson and Joakim Blomqvist

{"title":"The transition to phenomenological behaviour of static solutions of the Einstein–Dirac system for an increasing number of fermions","authors":"Håkan Andréasson and Joakim Blomqvist","doi":"10.1088/1361-6382/adf792","DOIUrl":"https://doi.org/10.1088/1361-6382/adf792","url":null,"abstract":"Static spherically symmetric solutions to the Einstein–Dirac system were constructed numerically for the first time in 1999 by Finster et al (1999 Phys. Rev. D59 104020) in the case of two fermions. In 2020 this result was generalized by Leith et al (2020 Phys. Rev. D101 106012) to a system consisting of an even number κ of fermions. They constructed solutions for . The purpose of the present investigation is to compare the properties of static solutions of the Einstein–Dirac system with static solutions of the Einstein–Vlasov system as the number of fermions increases, that is, for . Since the Einstein–Vlasov system is a fully classical physical model, whereas the Einstein–Dirac system is semiclassical and thus has a quantum signature, this framework provides an excellent opportunity to study the transition from quantum to classical behaviour. It turns out that even for a comparatively small number of particles, the features of the solutions are remarkably similar. For both systems, we find highly relativistic solutions having a multi-peak structure with strikingly similar characteristics. We also investigate the maximum compactness ratio of the solutions. The solutions of both systems share the fundamental properties regarding the maximum compactness ratio and obey the inequality derived in Andréasson (2008 J. Differ. Equ.245 2243–66). Furthermore, we investigate the sign of the pressure components of solutions of the Einstein–Dirac system. For small values of κ, there are regions where the radial pressure is negative. These regions disappear as κ increases. This supports the interpretation we make as a transition from quantum to classical behaviour as the number of fermions increases.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"40 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144839984","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

Advancing glitch classification in Gravity Spy: multi-view fusion with attention-based machine learning for Advanced LIGO’s fourth observing run 推进重力间谍中的故障分类：高级LIGO第四次观测运行的多视图融合与基于注意力的机器学习

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-08-13 DOI: 10.1088/1361-6382/adf58b

Yunan Wu, Michael Zevin, Christopher P L Berry, Kevin Crowston, Carsten Østerlund, Zoheyr Doctor, Sharan Banagiri, Corey B Jackson, Vicky Kalogera and Aggelos K Katsaggelos

{"title":"Advancing glitch classification in Gravity Spy: multi-view fusion with attention-based machine learning for Advanced LIGO’s fourth observing run","authors":"Yunan Wu, Michael Zevin, Christopher P L Berry, Kevin Crowston, Carsten Østerlund, Zoheyr Doctor, Sharan Banagiri, Corey B Jackson, Vicky Kalogera and Aggelos K Katsaggelos","doi":"10.1088/1361-6382/adf58b","DOIUrl":"https://doi.org/10.1088/1361-6382/adf58b","url":null,"abstract":"The first successful detection of gravitational waves by ground-based observatories, such as the Laser Interferometer Gravitational-Wave Observatory (LIGO), marked a breakthrough in our comprehension of the Universe. However, due to the unprecedented sensitivity required to make such observations, gravitational-wave detectors also capture disruptive noise sources called glitches, which can potentially be confused for or mask gravitational-wave signals. To address this problem, a community-science project, Gravity Spy, incorporates human insight and machine learning to classify glitches in LIGO data. The machine-learning classifier, integrated into the project since 2017, has evolved over time to accommodate increasing numbers of glitch classes. Despite its success, limitations have arisen in the ongoing LIGO fourth observing run (O4) due to the architecture’s simplicity, which led to poor generalization and inability to handle multi-time window inputs effectively. We propose an advanced classifier for O4 glitches. Using data from previous observing runs, we evaluate different fusion strategies for multi-time window inputs, using label smoothing to counter noisy labels, and enhancing interpretability through attention module-generated weights. Our new O4 classifier shows improved performance, and will enhance glitch classification, aiding in the ongoing exploration of gravitational-wave phenomena.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"188 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144839983","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

PINCH: pipeline-informed noise characterization in LIGO’s third observing run PINCH: LIGO第三次观测运行中的管道噪声表征

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-08-13 DOI: 10.1088/1361-6382/adf58c

Zach Yarbrough, Andre Guimaraes, Prathamesh Joshi, Gabriela González and Andrew Valentini

{"title":"PINCH: pipeline-informed noise characterization in LIGO’s third observing run","authors":"Zach Yarbrough, Andre Guimaraes, Prathamesh Joshi, Gabriela González and Andrew Valentini","doi":"10.1088/1361-6382/adf58c","DOIUrl":"https://doi.org/10.1088/1361-6382/adf58c","url":null,"abstract":"We present a method to identify and categorize gravitational wave candidate triggers identified by matched filtering gravitational wave searches (pipelines) caused by transient noise (glitches) in gravitational wave detectors using support vector machine (SVM) classifiers. Our approach involves training SVM models on pipeline triggers which occur outside periods of excess noise to distinguish between triggers caused by random noise and those induced by glitches. This method is applied independently to the triggers produced by the GstLAL search pipeline on data from the laser interferometer gravitational-wave observatory Hanford and Livingston observatories during the second half of the O3 observing run. The trained SVM models assign scores to ambiguous triggers, quantifying their similarity to triggers caused by random fluctuations, with triggers with scores above a defined threshold being classified as glitch-induced. Analysis of these triggers reveals the distinct impact of different glitch classes on the search pipeline, including their distribution in relevant parameter spaces. We use metrics such as the Bhattacharyya coefficient and an over-representation ratio to quantify the consistency and prevalence of glitch impacts over time and across parameter spaces. Our findings indicate that some glitch types consistently produce triggers in specific regions of the parameter space, while others generate triggers that are more widely distributed. We observe that Scattered Light glitches appear differently in the search pipeline before and after a commissioning change, demonstrating how such detector changes appear in the pipeline’s response to certain glitch classes. This method provides a framework for understanding and mitigating the influence of non-Gaussian transients on gravitational wave search pipelines, with implications for improving detection sensitivity and better understanding noise populations.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"8 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144839981","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

Generalization of Bohmian mechanics and quantum gravity effective action 波西米亚力学与量子引力有效作用的推广

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-08-13 DOI: 10.1088/1361-6382/adf607

Aleksandar Miković

{"title":"Generalization of Bohmian mechanics and quantum gravity effective action","authors":"Aleksandar Miković","doi":"10.1088/1361-6382/adf607","DOIUrl":"https://doi.org/10.1088/1361-6382/adf607","url":null,"abstract":"We generalize the de Broglie–Bohm (dBB) formulation of quantum mechanics to the case of quantum gravity (QG) by using the effective action (EA) for a QG theory. This is done by replacing the dBB equations of motion (EOM) with the EA EOM, which is beneficial even in the non-gravitational case, since in this way one avoids the violations of the Heisenberg uncertainty relations and the absence of the classical trajectories for stationary bound states. Another advantage of the EA formalism is that one can obtain the field configurations in the case of a quantum field theory (QFT). The proposed QG generalization is natural for Bohmiam mechanics because a dBB wavefunction is really a wavefunction of the Universe and in order to define the EA for an arbitrary initial state one needs a QG path integral. The QG EA can be constructed by using the piecewise flat QG (PFQG) theory and the PFQG EA can be approximated by the QFT EA for General Relativity coupled to matter, with a cutoff determined by the average edge length of the spacetime triangulation. One can then calculate the corresponding field configurations and from these field configurations one can obtain the trajectories for the corresponding elementary particles.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"19 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144839982","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

Ringdown signatures in the Ernst-Wild geometry: modelling Kerr black holes immersed in a magnetic field 恩斯特-怀尔德几何中的铃衰特征：模拟沉浸在磁场中的克尔黑洞

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-08-13 DOI: 10.1088/1361-6382/adf685

Kate J Taylor and Adam Ritz

引用次数: 0

Optimizing the longitudinal isolation for LIGO-style test mass suspensions 优化ligo式测试质量悬架的纵向隔离

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-08-12 DOI: 10.1088/1361-6382/adf608

E Bonilla, B Shapiro and B Lantz

引用次数: 0

Unraveling the Hubble tension with warm inflation 用热暴胀解开哈勃张力

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-08-12 DOI: 10.1088/1361-6382/adf40a

Anupama B and P K Suresh

引用次数: 0

Celestial quantum error correction: I. Qubits from noncommutative Klein space 天体量子纠错：I.来自非交换克莱因空间的量子比特

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-08-12 DOI: 10.1088/1361-6382/adf686

Alfredo Guevara and Yangrui Hu

引用次数: 0