Classical and Quantum Gravity最新文献_第4页

Mitigation of Incoherent Spectral Lines via Adaptive Coherence Analysis for Continuous Gravitational-Wave Searches 连续引力波搜索中自适应相干分析对非相干谱线的抑制

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-10-02 DOI: 10.1088/1361-6382/aeaf9c

Ye Zhou,Karl Wette

{"title":"Mitigation of Incoherent Spectral Lines via Adaptive Coherence Analysis for Continuous Gravitational-Wave Searches","authors":"Ye Zhou,Karl Wette","doi":"10.1088/1361-6382/aeaf9c","DOIUrl":"https://doi.org/10.1088/1361-6382/aeaf9c","url":null,"abstract":"Abstract The sensitivity of continuous gravitational-wave searches is strictly limited by non-Gaussian spectral artefacts that accumulate coherent power over long observation baselines. In this paper, we present an unsupervised mitigation framework based on adaptive network coherence analysis. Unlike traditional veto methods that discard entire frequency bands, our pipeline selectively suppresses local artefacts while preserving global potentially astrophysical signals. We validate the method using Advanced LIGO O3 data, analysing the cleaning performance across subsets spanning 1, 3, and 5 days. For the subsets spanning five days of O3 data, the pipeline identifies and mitigates 89% and 77% of the total spectral lines in the Hanford and Livingston detectors, respectively, while effectively preserving the coherent population consistent with astrophysical morphologies. This is achieved while modifying less than 7% of the analysis bandwidth spanning 20 Hz to 2000 Hz. Rigorous statistical verification and recovery of simulated signals demonstrates that the mitigation effectively suppresses the non-Gaussian tail of the noise distribution while strictly preserving the statistical integrity of coherent signal candidates. By recovering detector sensitivity in parameter spaces previously contaminated by the spectral forest, this framework provides a robust preprocessing strategy for all-sky searches.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"8 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149089486","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

Improving Slow-Roll Estimates in Starobinsky Inflation Using an Analytic Hubble Parameter 利用解析哈勃参数改进Starobinsky膨胀的慢滚估计

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-10-02 DOI: 10.1088/1361-6382/aeaf9f

Jose Mathew Mathew

{"title":"Improving Slow-Roll Estimates in Starobinsky Inflation Using an Analytic Hubble Parameter","authors":"Jose Mathew Mathew","doi":"10.1088/1361-6382/aeaf9f","DOIUrl":"https://doi.org/10.1088/1361-6382/aeaf9f","url":null,"abstract":"Abstract Inflationary observables are naturally formulated in terms of the&#xD;Hubble-flow hierarchy. Because exact background solutions are often&#xD;unavailable, the Hubble-flow parameters are commonly approximated&#xD;using potential slow-roll (PSR) quantities constructed from&#xD;derivatives of the inflationary potential. We revisit the accuracy of&#xD;this replacement for Starobinsky inflation by mapping analytic&#xD;Jordan-frame background variables to their Einstein-frame&#xD;counterparts and deriving the Hubble-flow parameters directly. The&#xD;leading analytic background is an exact solution of a controlled&#xD;deformation of the Starobinsky action. Linearizing the pure&#xD;Starobinsky equation about this background yields a closed-form&#xD;perturbative correction. Using the same first-order spectral&#xD;expressions throughout, the perturbatively corrected background&#xD;tracks the numerical evolution of the first two Hubble-flow&#xD;parameters more accurately than the next-to-leading-order (NLO) PSR&#xD;approximation over the common domain in which the NLO expressions&#xD;remain physical. Moreover, the NLO estimate of&#xD;(widetilde{epsilon}_1) reaches a maximum value of approximately&#xD;(0.114), subsequently decreases, and therefore cannot determine the&#xD;end of inflation from (widetilde{epsilon}_1=1). For the Planck&#xD;2018 central value (n_s=0.9649), the perturbatively corrected&#xD;background gives (widetilde{N}_*simeq55.60), compared with&#xD;(55.72) for the converged numerical background and (56.98) for&#xD;the conventional large-(widetilde{N}_*) estimate. For the adopted&#xD;ACT DR6 combined-data value (n_s=0.974), it gives&#xD;(widetilde{N}_*simeq75.43), compared with the conventional value&#xD;(76.92). The analytic construction therefore provides a&#xD;self-consistent endpoint and a first-order estimate of the e-fold&#xD;number that closely reproduces the converged numerical result.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"20 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149089472","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

Sensing the Inflationary Production of Scalars 感知标量的膨胀生产

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-10-01 DOI: 10.1088/1361-6382/aeaf36

Anthony Foraci,Christos Litos,Richard P Woodard

引用次数: 0

Effective spherical symmetry in Loop Quantum Gravity: A path integral approach 环量子引力中的有效球对称：一种路径积分方法

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-10-01 DOI: 10.1088/1361-6382/aeaf3a

Juan Carlos Del Águila Rodríguez,Hugo A Morales-Tecotl

{"title":"Effective spherical symmetry in Loop Quantum Gravity: A path integral approach","authors":"Juan Carlos Del Águila Rodríguez,Hugo A Morales-Tecotl","doi":"10.1088/1361-6382/aeaf3a","DOIUrl":"https://doi.org/10.1088/1361-6382/aeaf3a","url":null,"abstract":"Abstract In this work a loop quantum corrected model is obtained for spherically symmetric space-times in vacuum. This effective model is derived by the use of the path integral method, previously employed in several models of Loop Quantum Cosmology. Our principal aim is to find explicit corrections corresponding to inverse triad and holonomy effects that commonly arise from the loop quantization procedure. These corrections modify the Hamiltonian constraint of the classical theory, adding quantum parameters that represent the length of the holonomies considered during quantization. The semiclassical theory yielded reduces to the classical case in the limit when such lengths vanish. Solutions to the effective dynamics of a simplified version of the complete corrected theory are then found and used to describe an effective geometry with inverse triad corrections. This modified space-time represents a black hole with a curvature singularity in its interior which, contrary to its classical counterpart, does not lead to null geodesic incompleteness. For the case of holonomy corrections, preliminary arguments are given in favor of a potential singularity resolution.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"14 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149089104","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

Teleparallel Gravity as a spontaneously broken gauged non-linear sigma model 遥平行重力作为一个自发破缺的非线性sigma模型

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-10-01 DOI: 10.1088/1361-6382/aeaf39

Andrea Addazi

引用次数: 0

Fermionic fields of higher spin in de Sitter space 德西特空间中高自旋费米子场

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-10-01 DOI: 10.1088/1361-6382/aeaf37

Dionysios Anninos,Chiara Baracco,Vasileios A Letsios,Guillermo Ariel Ariel Silva

{"title":"Fermionic fields of higher spin in de Sitter space","authors":"Dionysios Anninos,Chiara Baracco,Vasileios A Letsios,Guillermo Ariel Ariel Silva","doi":"10.1088/1361-6382/aeaf37","DOIUrl":"https://doi.org/10.1088/1361-6382/aeaf37","url":null,"abstract":"Abstract We consider fermionic fields of higher spin on a four-dimensional de Sitter background. A particular emphasis is placed on the Rarita-Schwinger spin-3/2 case. Both massive fields and gauge fields are considered, and their relation to the representation theory of SO(4,1) is discussed. In Lorentzian signature, we study properties of the Bunch-Davies mode functions, and the late time structure of their two-point functions. For the Rarita-Schwinger gauge field, we consider a quantisation procedure based on the Minkowskian limit of the field operator. In Euclidean signature, the fields are placed on a four-sphere and the Euclidean path integral is computed at one-loop. The resulting Euclidean partition function is expressed in terms of unitary Lorentzian group characters with edge corrections. The unitary nature of the characters contrasts the lack of a conventional real action for the Rarita-Schwinger gauge field in de Sitter space. We speculate on the microscopic properties of a theory comprised of an infinite tower of interacting integer and half-integer gauge fields in de Sitter space. Along the way, we discuss a potentially interesting expression for the higher-spin path integral on the four-sphere.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"36 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149089099","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

Relativistic and Newtonian Proca Stars: A Tale of Two Limits 相对论和牛顿Proca星：两个极限的故事

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-10-01 DOI: 10.1088/1361-6382/aeaf38

Alberto Diez-Tejedor,Carlos A R Herdeiro,Claudio Cesar Lazarte Melgar,Eugen Radu,Armando Andrés A Estrada,Nicolas Sanchis-Gual,Etevaldo dos Santos Costa Filho

{"title":"Relativistic and Newtonian Proca Stars: A Tale of Two Limits","authors":"Alberto Diez-Tejedor,Carlos A R Herdeiro,Claudio Cesar Lazarte Melgar,Eugen Radu,Armando Andrés A Estrada,Nicolas Sanchis-Gual,Etevaldo dos Santos Costa Filho","doi":"10.1088/1361-6382/aeaf38","DOIUrl":"https://doi.org/10.1088/1361-6382/aeaf38","url":null,"abstract":"Abstract We investigate a representative set of static solitonic solutions of the Einstein-Proca theory in the Newtonian regime, where the field frequency approaches the particle mass, $omega to mu$, and compare them with the corresponding solutions of the spin-1 Schr\"odinger-Poisson system, which provides the effective description in this limit. While this correspondence is relatively straightforward in the Einstein-Klein-Gordon case, the vector nature of the Proca field, combined with the enhanced $U(3)$ symmetry of the nonrelativistic spin-1 regime, gives rise to several nontrivial features that require careful analysis. We establish a mapping between the two descriptions by identifying $ell=0$ electric Proca stars with radially polarized (hedgehog) configurations and $ell=1$ electric Proca stars with linearly polarized configurations. We further clarify some aspects of the ground state and resolve several apparent discrepancies between relativistic and Newtonian solutions, particularly concerning their morphology and stability properties. An important conclusion of this work is that the nonrelativistic regime supports a richer spectrum of stable equilibrium configurations than the relativistic theory, including stable excited states.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"24 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149089069","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

Infrared consistency of scalar-tensor induced gravitational waves 标量张量诱导引力波的红外一致性

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-10-01 DOI: 10.1088/1361-6382/aeaf3b

Yan Han,Xiang-Qian Li

{"title":"Infrared consistency of scalar-tensor induced gravitational waves","authors":"Yan Han,Xiang-Qian Li","doi":"10.1088/1361-6382/aeaf3b","DOIUrl":"https://doi.org/10.1088/1361-6382/aeaf3b","url":null,"abstract":"Abstract The interpretation of gravitational-wave spectra generated beyond linear order depends on how infrared metric perturbations are separated from genuine radiative production. We study this question in the scalar--tensor channel of cosmological induced gravitational waves, where a long scalar perturbation with momentum $q$ couples to a much shorter tensor mode with momentum $k$. In the standard radiation-era second-order kernel, the helicity-preserving soft sector contains an apparent enhancement as $q/k$ tends to zero. We show that the leading part of this enhancement is not a local source of gravitational-wave energy. It is the fixed-order expansion of the eikonal, or Shapiro, propagation phase accumulated by the short tensor wave in the long scalar metric. We extract the leading eikonal sector from the complete third-order scalar--scalar--tensor source decomposition and identify the nested $h^{(2)}Phi$ propagation ladder as the unique term with two uncompensated long-time integrals. Its coefficient supplies the $P_{13}$ companion that cancels the phase-square contribution contained in $P_{22}$. We then formulate the residual response in a relational light-time observable, where constant and gradient long-mode effects cancel among the metric, endpoints, tetrads and null path, leaving the first observable scalar response at tidal order. The result gives an infrared-safe interpretation of the scalar--tensor induced spectrum and clarifies which part of the long-mode response can be used as a physical gravitational-wave observable.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"1 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149089100","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 wormhole with two black holes 一个有两个黑洞的虫洞

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-09-21 DOI: 10.1088/1361-6382/aeaabf

Gerard Clement

引用次数: 0

Rapid data quality investigations of gravitational-wave events with the Data Quality Report Builder toolkit 使用数据质量报告生成器工具包对引力波事件进行快速数据质量调查

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2026-09-21 DOI: 10.1088/1361-6382/aeaa9d

Derek Davis,Zach Yarbrough,Ronaldas Macas,Nicolas Arnaud,Adrian Helmling-Cornell,Paolina Doliva,Olivia Godwin,Sofia Álvarez-López,Chayan Chatterjee,Francesco Di Renzo,Dimitrios Pesios,Joseph S Areeda,Marissa Beth Walker,Hirotaka Yuzurihara,Benjamin Mannix,Max Trevor,Philippe Nguyen,Viola Sordini,Cristiano Palomba,Beverly K Berger,Rachael Huxford

{"title":"Rapid data quality investigations of gravitational-wave events with the Data Quality Report Builder toolkit","authors":"Derek Davis,Zach Yarbrough,Ronaldas Macas,Nicolas Arnaud,Adrian Helmling-Cornell,Paolina Doliva,Olivia Godwin,Sofia Álvarez-López,Chayan Chatterjee,Francesco Di Renzo,Dimitrios Pesios,Joseph S Areeda,Marissa Beth Walker,Hirotaka Yuzurihara,Benjamin Mannix,Max Trevor,Philippe Nguyen,Viola Sordini,Cristiano Palomba,Beverly K Berger,Rachael Huxford","doi":"10.1088/1361-6382/aeaa9d","DOIUrl":"https://doi.org/10.1088/1361-6382/aeaa9d","url":null,"abstract":"Abstract We present the Data Quality Report Builder toolkit, DQRbuild, a suite of data quality tools that have been developed to vet gravitational-wave events in preparation for the fourth LIGO-Virgo-KAGRA observing run. We explain the main functionality and the many scientific tests that we support. To validate the performance of the tools included in the toolkit, we run a series of tests on all significant candidates shared as public alerts in the third observing run to compare against what was manually reported using human intervention. We find that these automated tools can now identify 96% of the problems identified by humans during this previous observing run, with a 24% false alarm rate. We conclude with a commentary on the prospects and potential challenges for fully automating the process of vetting the data quality for gravitational-wave events identified in future observing runs.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"3 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2026-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149020774","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