Classical and Quantum Gravity最新文献_第7页

Coronagraphic time-delay interferometry: characterization and updated geometric properties 日冕延时干涉术：表征和更新的几何特性

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-06-03 DOI: 10.1088/1361-6382/addbbd

Raissa Costa Barroso, Yves Lemière, François Mauger and Quentin Baghi

{"title":"Coronagraphic time-delay interferometry: characterization and updated geometric properties","authors":"Raissa Costa Barroso, Yves Lemière, François Mauger and Quentin Baghi","doi":"10.1088/1361-6382/addbbd","DOIUrl":"https://doi.org/10.1088/1361-6382/addbbd","url":null,"abstract":"The Laser Interferometer Space Antenna (LISA) will be a space-borne gravitational wave (GW) detector to be launched in the next decade. Central to LISA data analysis is time-delay interferometry (TDI), a numerical procedure which drastically reduces otherwise overwhelming laser frequency noise. LISA data analysis is usually performed on sets of TDI variables, e.g. Michelson variables or quasiorthogonal variables . We investigate a less standard TDI variable denoted κ which depends on time, or frequency, and two parameters . This so-called coronagraphic TDI variable has the singular property of canceling GW signal when tend to the sky position of the GW source. Note that, as a consequence of LISA’s planar symmetry, GW signal is also canceled when tend to . Nonetheless, thanks to this property, coronagraphic TDI has the potential to be an efficient model-agnostic method for sky localization of GW sources with LISA. These characteristics make it relevant for low-latency searches and a possible glitch veto. Although briefly discussed in the literature, coronagraphic TDI has only been tested on theoretical grounds. In this paper we validate the applicability of κ to sky localization of typical LISA sources, namely Galactic binaries and massive black hole binaries, when considering a simplified LISA instrument. The goal of this paper is to pave the way for applications of coronagraphic TDI to practical LISA data analysis problems.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"247 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144211347","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

First characterisation of the MAGO cavity, a superconducting RF detector for kHz–MHz gravitational waves 第一个表征MAGO腔，一个超导射频探测器用于kHz-MHz引力波

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-05-29 DOI: 10.1088/1361-6382/add8da

Lars Fischer, Bianca Giaccone, Ivan Gonin, Anna Grassellino, Wolfgang Hillert, Timergali Khabiboulline, Tom Krokotsch, Gudrid Moortgat-Pick, Andrea Muhs, Yuriy Orlov, Michel Paulsen, Krisztian Peters, Sam Posen, Oleg Pronitchev and Marc Wenskat

{"title":"First characterisation of the MAGO cavity, a superconducting RF detector for kHz–MHz gravitational waves","authors":"Lars Fischer, Bianca Giaccone, Ivan Gonin, Anna Grassellino, Wolfgang Hillert, Timergali Khabiboulline, Tom Krokotsch, Gudrid Moortgat-Pick, Andrea Muhs, Yuriy Orlov, Michel Paulsen, Krisztian Peters, Sam Posen, Oleg Pronitchev and Marc Wenskat","doi":"10.1088/1361-6382/add8da","DOIUrl":"https://doi.org/10.1088/1361-6382/add8da","url":null,"abstract":"Heterodyne detection using microwave cavities is a promising method for detecting high-frequency gravitational waves (GWs) or ultralight axion dark matter. In this work, we report on studies conducted on a spherical 2-cell cavity developed by the MAGO collaboration for high-frequency GWs detection. Although fabricated around 20 years ago, the cavity had not been used since. Due to deviations from the nominal geometry, we conducted a mechanical survey and performed room-temperature plastic tuning. Measurements and simulations of the mechanical resonances and electromagnetic properties were carried out, as these are critical for estimating the cavity’s GW coupling potential. Based on these results, we plan further studies in a cryogenic environment. The cavity characterisation does not only provide valuable experience for a planned physics run but also informs the future development of improved cavity designs.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"146 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144177036","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

Extended datasamples under the lens of Brane World Theory 膜世界理论下的扩展数据样本

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-05-28 DOI: 10.1088/1361-6382/adda89

Kyra Jacobo and Dorian Araya

{"title":"Extended datasamples under the lens of Brane World Theory","authors":"Kyra Jacobo and Dorian Araya","doi":"10.1088/1361-6382/adda89","DOIUrl":"https://doi.org/10.1088/1361-6382/adda89","url":null,"abstract":"This work revises the Brane World Theory known as Randall Sundrum with the modification of an exponential, redshift-dependent brane tension. This model is studied in a scenario assuming no dark energy, with the aim of determining whether it can reproduce the Universe’s acceleration on its own, without the addition of a dark energy fluid. Bayesian Statistical analysis is performed in order to constrain the free parameters of each scenario for which the datasamples of SLS, SNIa, OHD and BAO are used, the last two considering newly added elements on the data. Both Planck and Riess priors for h are used and compared. In both cases we are able to reproduce the late-time accelerated expansion in agreement with observational data. Interesting consistencies at transition redshift zt with ΛCDM are found suggesting that this might be a suitable model for studying the evolution of the Universe up to present date, however, some pathologies are detected in this model, namely a ‘Big Rip’ divergence of H(z) at z = 1, as well as a strong relationship between the form of the functional for the brane tension and the future evolution of the Universe in this model.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"1 1","pages":"115014"},"PeriodicalIF":3.5,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165232","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 dynamic theory of entanglement for uniformly accelerated atoms 匀加速原子纠缠的动力学理论

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-05-28 DOI: 10.1088/1361-6382/adda8b

M S Soares, G Menezes and N F Svaiter

引用次数: 0

Brill waves with slow fall-off towards spatial infinity 向无限空间缓慢衰减的布里尔波

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-05-26 DOI: 10.1088/1361-6382/add5b7

Lydia Bieri, David Garfinkle and James Wheeler

引用次数: 0

Possibility analysis of a flat cuboid Au–Pt alloy test mass employed in space gravitational wave detection 扁长方体Au-Pt合金试验质量用于空间引力波探测的可能性分析

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-05-26 DOI: 10.1088/1361-6382/add837

Zi-He Huang, Yan-Chong Liu and Ze-Bing Zhou

{"title":"Possibility analysis of a flat cuboid Au–Pt alloy test mass employed in space gravitational wave detection","authors":"Zi-He Huang, Yan-Chong Liu and Ze-Bing Zhou","doi":"10.1088/1361-6382/add837","DOIUrl":"https://doi.org/10.1088/1361-6382/add837","url":null,"abstract":"Space-based gravitational wave detection generally employs kilogram-scale cubic test masses. The flat cuboid test mass for gravity satellites has the advantages of lightweight, low remanent magnetic moment, low preload force requirement and convenient ground testing. The paper analyses the relationship between acceleration noise and dimensions, identifying that the flat cuboid Au–Pt alloy test mass is promising for space-based gravitational wave detection. The scheme proposed in the paper adopts a new electrostatic control strategy, avoiding the noise of rotating electrostatic control in a sensitive direction. Based on this scheme, theoretical analysis shows that the flat cuboid Au–Pt alloy test mass can achieve a performance of about between to , limited by Brownian noise, random charging noise and magnetic noise. Finally, the paper presents the performance of test masses in different dimensions, finding that increasing the side length along the sensitive direction is the most efficient optimisation for performance in the low frequency range. The flat cuboid Au–Pt test mass represents a potential inertial sensor scheme for space-based gravitational wave detection.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"18 1","pages":"115010"},"PeriodicalIF":3.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144145497","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

Substoichiometric silica in a multimaterial highly reflective coating 多材料高反射涂层中的亚化学计量二氧化硅

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-05-26 DOI: 10.1088/1361-6382/add2c6

Nicholas Demos, Slawomir Gras, Matthew Evans, Peter O’Brien, Garilynn Billingsley and Liyuan Zhang

引用次数: 0

On the singularities of the exponential function of a semidirect product 半直积的指数函数的奇异性

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-05-26 DOI: 10.1088/1361-6382/add786

Alexandru Chirvasitu, Rafael Dahmen, Karl–Hermann Neeb and Alexander Schmeding

引用次数: 0

Supermassive binary black holes and current status of their multimessenger observations 超大质量双黑洞及其多信使观测的现状

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-05-22 DOI: 10.1088/1361-6382/adc4b0

Youjun Lu

引用次数: 0

On the symmetry of Special Quantum Relativity 论狭义量子相对论的对称性

IF 3.5 3区物理与天体物理

Classical and Quantum Gravity Pub Date : 2025-05-22 DOI: 10.1088/1361-6382/add838

Otto C W Kong

{"title":"On the symmetry of Special Quantum Relativity","authors":"Otto C W Kong","doi":"10.1088/1361-6382/add838","DOIUrl":"https://doi.org/10.1088/1361-6382/add838","url":null,"abstract":"Quantum reference frame as in the example of observing a quantum particle from another has been a topic of much recent interest. Quantum spatial translations, quantum rotations, and quantum Lorentz boosts in the sense have been studied to some extent. The article aims at using a consistent formulation of all that to give a full picture of what would be the symmetry of Special Quantum Relativity as special relativity as seen from quantum particles. We first look at a direct formulation of the mathematical quantum analog of any classical one-parameter Lie group of such transformations suggested by our Heisenberg picture thinking of quantum mechanics. A quantum rotation and a quantum Lorentz boost are presented. Analysis of the compositions of two such transformations shows unnatural results with various problems, especially with their commutators. From a physical point of view, we argue for a modified formulation. A quantum reference frame transformation, as the description of firstly the spacetime position of an object, idealized as a particle, as seen from another has to involve a full set of four-coordinate quantum quantities instead of one in a single coordinate only. Unlike the classical case, we illustrate that the analog of a change by the zero classical coordinate values has nontrivial effects in the transformation. A consistent full picture of the symmetry is then obtained. Results that could be interpreted essentially as the quantum analogs of the translation of a single coordinate observable, including angular ones for a rotation or a boost, can be retrieved from that but only as approximations. Under the traditional perspective of relativity symmetry being about spacetime reference frames, our task is then completed. We further look at the quantum version of Heisenberg–Weyl symmetry and perspectives on its relation with the subject matter and argue for the necessity of our background noncommutative geometric perspective for a conceptual consistent story.","PeriodicalId":10282,"journal":{"name":"Classical and Quantum Gravity","volume":"138 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144130135","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