Fortschritte Der Physik-Progress of Physics最新文献

Based on the Sen spacetime, the orbital energy and angular momentum are calculated, and the solution for the motion of a test particle derived to the second post-Newtonian order. The effect of the Sen black hole's charge $�q_m$ on the periastron advance and orbital period is obtained. In particular, it is found that $�q_m$ has an influence on perihelion precession at both the first and second post-Newtonian orders, whereas its effect on the orbital period is confined solely to the second post-Newtonian order. Finally, the precession of the star S2 is used to constrain our model and the value of $��q_m�/�M�$ is 0.51.

The entanglement wedge duality in AdS/CFT, Karch–Randall braneworld and black hole (BH) physics is discussed, critically (as in critiques) revolving around Terashima (2024) and Mathur (2009). Emphasis are placed on the semiclassicality requirement and potential breakdown of bulk-wise effective Hilbert space factorization between the BH exterior and the interior, supported by various examples. In particular, a simple quasi-paradox for the entanglement wedge duality in AdS/BCFT is put forward, suggesting that it is not possible to have all of semiclassicality, the entanglement wedge duality and bulk-wise Hilbert space factorization in Karch–Randall braneworld. Giving up factorization, a toy qudit model of BCFT is developed as to derive purification of the BH exterior, despite mostly sharing the setup with the small corrections theorem of Mathur (2009). Put together, the entanglement wedge duality is yet to be disproved despite some results by Terashima, and a toy qudit model cannot disprove semiclassicality in BH physics. The precise understanding of the duality also helps identify how the BH information paradox is dissolved within double holography beyond Karch–Randall braneworld setups.

A novel pathway to generate the electroweak (EW) scale via non-perturbative dynamics of a conformally invariant scalar sector at the classical level is proposed. A method is provided to estimate the non-perturbative EW scale generation using the exact solution of the background equations of motion in a scalar theory via the Dyson–Schwinger approach. Particularly, an analytical result for the Higgs mass in the strongly coupled regime is found in terms of its quartic self interaction term and the cut-off scale of the theory. It is also shown that the Higgs sector is an essential part of the standard model as, without it, a Yang–Mills gauge theory cannot acquire mass even if a self-interaction term is present. A more realistic model building with possible solutions to the gauge hierarchy problem and, in general, to the dynamical generation of any scales scales in nature, be it the visible sector or the dark sector, is led by this analysis.

The study of the compatibility of curvature-matter coupling gravity theory within the framework of swampland conjectures is explored in this manuscript. The de-sitter swampland conjecture is considered in relation to the inflationary solution generated by the curvature-matter coupling gravity. The slow-roll conditions are derived for the specific case of $��f��(�R�,�L_m�)��=�\frac{R}{2}�+�\alpha �{�\left(�L_m�\right)�}^n�$ model. The results show that the swampland conjectures are at odds with the slow-roll condition for curvature-matter coupling gravity theory. Therefore, it is concluded that the swampland conjectures and the curvature-matter coupling gravity, Specifically, $��f��(�R�,�L_m�)��=�\frac{R}{2}�+�\alpha �{�\left(�L_m�\right)�}^n�$ model appear to be inconsistent with each other within the context of an inflationary profile of curvature-matter coupling gravity th

The Kazakov–Solodukhin black hole (BH) metric represents a spherically symmetric deformation of the Schwarzschild solution due to quantum-gravity corrections. Assuming the absence of nonspherical deformations of the metric, this problem was solved nonperturbatively. In this study, the intensity of Hawking radiation in the background of such quantum-corrected BHs and the behavior of their quasinormal modes (QNM) are investigated. The findings indicate that while the geometry and such classical characteristics as the fundamental QNM frequencies or the shadow radius are only slightly altered, the Hawking radiation and the frequencies of QNM overtones of sufficiently small BHs change much more significantly. This Hawking radiation enhancement arises due to much larger grey-body factors, while the Hawking temperature remains unaffected. The effect becomes significant at the latest stage of BH evaporation.

In this paper, the development of a spectral triple-like construction on a configuration space of gauge connections is continued. It has previously been shown that key elements of bosonic and fermionic quantum field theory emerge from such a geometrical framework. In this paper, a central problem concerning the inclusion of fermions with half-integer spin into this framework is solved. The tangent space of the configuration space is mapped into a similar space based on spinors, and this map is used to construct a Dirac operator on the configuration space. A real structure acting in a Hilbert space over the configuration space is also constructed. Finally, it is shown that the self-dual and anti-self-dual sectors of the Hamiltonian of a nonperturbative quantum Yang-Mills theory emerge from a unitary transformation of a Dirac equation on a configuration space of gauge fields. The dual and anti-dual sectors are shown to emerge in a two-by-two matrix structure.