The European Physical Journal C最新文献_第8页

Quantum correlations of tripartite mixed states in the black hole quantum atmosphere 黑洞量子大气中三方混合态的量子相关

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-23 DOI: 10.1140/epjc/s10052-026-16377-6

Anqi Zhang, Yanze Zheng, Xiaofen Huang, Tinggui Zhang

{"title":"Quantum correlations of tripartite mixed states in the black hole quantum atmosphere","authors":"Anqi Zhang, Yanze Zheng, Xiaofen Huang, Tinggui Zhang","doi":"10.1140/epjc/s10052-026-16377-6","DOIUrl":"10.1140/epjc/s10052-026-16377-6","url":null,"abstract":"<div>We investigate quantum state texture, genuine multipartite entanglement, and tripartite nonlocality of a tripartite mixed state in the black hole quantum atmosphere. By introducing the Hartle-Hawking local temperature into the Bogoliubov coefficients, we characterize the influence of the local Hawking effect on both physically accessible and inaccessible reduced states. We find that the extrema of these three quantities all lie in the same near horizon region and shift outward with increasing local Hawking temperature, coinciding with the peak region of the local Hawking temperature and indicating that different aspects of tripartite quantum information are most sensitive to the local Hawking effect in the same atmospheric region. In contrast to genuine multipartite entanglement, tripartite nonlocality is more fragile and is suppressed under stronger local Hawking effects. These results provide a unified characterization of density matrix restructuring, entanglement redistribution, and nonlocality in tripartite mixed states affected by the black hole quantum atmosphere.\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-16377-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149035378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Geometric quantum discord in the black hole quantum atmosphere 黑洞量子大气中的几何量子不和谐

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-23 DOI: 10.1140/epjc/s10052-026-16283-x

Siwei Li, Xiaofen Huang

引用次数: 0

EasyScan_HEP 2: LLM-agent parameter-scan workflows in high energy physics EasyScan_HEP 2：高能物理中LLM-agent参数-扫描工作流程

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-23 DOI: 10.1140/epjc/s10052-026-16358-9

Yang Xiao, Yuanfang Yue, Yang Zhang

{"title":"EasyScan_HEP 2: LLM-agent parameter-scan workflows in high energy physics","authors":"Yang Xiao, Yuanfang Yue, Yang Zhang","doi":"10.1140/epjc/s10052-026-16358-9","DOIUrl":"10.1140/epjc/s10052-026-16358-9","url":null,"abstract":"<div>Large-language-model (LLM) agents are beginning to reshape the preparation and steering of computational workflows in high-energy physics phenomenology. To accommodate this change, we upgrade EasyScan_HEP to make the construction of parameter-scan configuration files more accessible to LLM-agent assistance. EasyScan _HEP 2 exposes command-line and machine-readable interfaces for LLM-agent workflows, allowing an assistant to translate natural language requests into an explicit .ini configuration that defines the scan method, external-program workflow, constraints, and outputs. The resulting configuration can be inspected through a local Web interface. The framework also supports LLM-agent-guided extension to new scan methods, as illustrated by the integration of BESTFIT, EMCEE, and DYNESTY. In this way, EasyScan_HEP 2 adapts parameter-scan workflows to LLM-agent use while preserving reproducibility, transparency, and user control.\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-16358-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149035387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determination of the metric of a Schwarzschild black hole surrounded by a halo of dark matter 确定被暗物质光环包围的史瓦西黑洞的度规

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-23 DOI: 10.1140/epjc/s10052-026-16375-8

M. Castillo Alarcón, Leonel Bixano, I. A. Sarmiento-Alvarado, Claudio Salas-Pérez, Tonatiuh Matos

{"title":"Determination of the metric of a Schwarzschild black hole surrounded by a halo of dark matter","authors":"M. Castillo Alarcón, Leonel Bixano, I. A. Sarmiento-Alvarado, Claudio Salas-Pérez, Tonatiuh Matos","doi":"10.1140/epjc/s10052-026-16375-8","DOIUrl":"10.1140/epjc/s10052-026-16375-8","url":null,"abstract":"<div>Following the landmark acquisition of the first image of a black hole, systems comprising a black hole enveloped by a dark matter halo have attracted considerable attention. This work implements a novel method to analyze the structure of a system composed of a Schwarzschild black hole and a dark matter halo modeled as an anisotropic fluid, while ensuring that the proposed metric constitutes an exact solution of the Einstein field equations. Numerical results show that the connection between the temporal and radial metric functions preserves an inverse relationship, namely (A(r) approx 1/B(r)). Furthermore, we analytically demonstrate that the resulting functions satisfy (A(r)B(r) = 1 + mathscr {O}(10^{-6})), in excellent agreement with the numerical findings. In addition, the Einstein equations imply that the variation of the product (A(r)B(r)) is governed by the factor (varepsilon _h=frac{8pi Grho _0r_0^2}{c^2}). Finally, we show that the interior Schwarzschild region and the exterior dark matter halo can be joined smoothly via a regular Darmois–Israel junction, without generating any thin-shell curvature steps. To assess the observational implications of the model, we compare its theoretical predictions for the pericenter precession of the S2 star and the angular size of the shadow of Sgr A*. In both cases, the predicted deviations remain within the observational uncertainties reported by the GRAVITY Collaboration and the Event Horizon Telescope (EHT), respectively. These results demonstrate that the proposed black hole–dark matter halo configuration is not only mathematically consistent, but also compatible with current observational constraints.\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-16375-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hawking radiation from a semi-classical Schwarzschild black hole 来自半经典史瓦西黑洞的霍金辐射

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-23 DOI: 10.1140/epjc/s10052-026-16370-z

Moslem Shafiee, Ahmad Sheykhi

引用次数: 0

Exact solution of the Klein–Gordon equation in a Kiselev black hole background 在Kiselev黑洞背景下Klein-Gordon方程的精确解

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-23 DOI: 10.1140/epjc/s10052-026-16325-4

M. D. de Oliveira, Alexandre G. M. Schmidt

引用次数: 0

Tests of general relativity using analytic derivatives of parametrized post-Einsteinian gravitational waveforms within the Fisher-matrix framework 在费雪矩阵框架内用参数化后爱因斯坦重力波形的解析导数检验广义相对论

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-23 DOI: 10.1140/epjc/s10052-026-16251-5

Jie Wu, Mengfei Sun, Jin Li

{"title":"Tests of general relativity using analytic derivatives of parametrized post-Einsteinian gravitational waveforms within the Fisher-matrix framework","authors":"Jie Wu, Mengfei Sun, Jin Li","doi":"10.1140/epjc/s10052-026-16251-5","DOIUrl":"10.1140/epjc/s10052-026-16251-5","url":null,"abstract":"<div>Testing gravity beyond general relativity (GR) is essential for probing fundamental physics in the strong-field and highly dynamical regime accessed by gravitational-wave (GW) observations. In this work, we derive analytic expressions for waveform derivatives in the Fisher-matrix formalism within the parametrized post-Einsteinian framework, using the frequency-domain inspiral waveform. These analytic derivatives enable stable and efficient Fisher-matrix calculations without relying on finite-difference schemes. We apply this method to a wide range of detector configurations, including space-based, ground-based, and multiband observations, and combine it with different binary black hole population models. Our results reveal clear and systematic trends in the constraints on non-GR effects as functions of post-Newtonian order, detector type, and source population. They also demonstrate the complementarity between space- and ground-based detectors, particularly for effects that accumulate during the low-frequency inspiral. The analytic approach substantially reduces computational cost and avoids numerical systematics associated with step-size choices, making it well suited for large-scale parameter studies. These results provide robust forecasts for the capability of future GW observations to constrain a broad class of non-GR effects and environmental influences, highlighting the scientific potential of upcoming detector networks for precision tests of gravity.</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-16251-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149035382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bianchi IX dynamics with a phantom field 比安奇IX动力学的幻影场

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-23 DOI: 10.1140/epjc/s10052-026-16386-5

Adel Awad, Dmitry Chirkov, Alexey Golovnev, Alexey Toporensky

引用次数: 0

Krylov complexity in non-inertial quantum systems 非惯性量子系统中的克里洛夫复杂度

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-22 DOI: 10.1140/epjc/s10052-026-16271-1

Ming-Qi Ma, Shi-Cheng Liu, Lei-Hua Liu, Hai-Qing Zhang

{"title":"Krylov complexity in non-inertial quantum systems","authors":"Ming-Qi Ma, Shi-Cheng Liu, Lei-Hua Liu, Hai-Qing Zhang","doi":"10.1140/epjc/s10052-026-16271-1","DOIUrl":"10.1140/epjc/s10052-026-16271-1","url":null,"abstract":"<div>This study formulates observer-dependent Krylov spreading for non-inertial quantum systems driven by linear Bogoliubov transformations. Starting with the closed single Rindler-pair SU(1, 1) sector, we show that its Lanczos basis is identical to the Rindler pair-number basis. As a result, the Krylov spread complexity reduces exactly to the mean number of correlated Rindler pairs, (C_k=vert beta _kvert ^2). Within this framework, we demonstrate that Krylov spreading dynamics are governed by the competition between the detuning parameter and the coupling constant, naturally dividing the dynamics into three distinct regimes. Notably, Krylov complexity becomes localized in the detuning-dominated regime. By extending this to a multimode, strictly quadratic Bogoliubov Hamiltonian, we find that inequivalent Rindler wave-packet pairs violate the (C_k=vert beta _kvert ^2) correspondence, thereby highlighting the single-pair SU(1, 1) model as an exactly solvable, observer-adapted benchmark. In such multimode scenarios, the mean pair-number eigenstates no longer dictate Krylov complexity. Overall, our work provides a new perspective for analyzing Krylov complexity in non-inertial quantum systems.\u0000\u0000</div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"86 9","pages":""},"PeriodicalIF":4.9,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-026-16271-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Properties of stable massive quark stars in holography 全息术中稳定大质量夸克星的性质。

IF 4.9 2区物理与天体物理

The European Physical Journal C Pub Date : 2026-09-22 DOI: 10.1140/epjc/s10052-026-16338-z

Kazem Bitaghsir Fadafan, Jesús Cruz Rojas, Jonas Mager

引用次数: 0