Fri - 03/01/24

There is no new related paper today

There is no new related paper today

  1. [2402.18237] - Quantum state of Yang-Mills fields in $SU(\infty)$ Quantum Gravity ($SU(\infty)$-QGR) - Houri Ziaeepour

  2. [2402.18536] - Quantum Gravity: are we there yet? - Shahn Majid

  3. [2402.17844] - Renormalisation of postquantum-classical gravity - Andrzej Grudka, Jonathan Oppenheim, Andrea Russo, Muhammad Sajjad

  4. [2402.17977] - Null Infinity as a Weakly Isolated Horizon - Abhay Ashtekar, Simone Speziale

Thu - 02/29/24

There is no new related paper today

Solving the area-length systems in discrete gravity using homotopy continuation

  • Authors: Seth K. Asante, Taylor Brysiewicz
  • Subjects: General Relativity and Quantum Cosmology (gr-qc); Algebraic Geometry (math.AG)
  • Arxiv link: https://arxiv.org/abs/2402.17080
  • Abstract Area variables are intrinsic to connection formulations of general relativity, in contrast to the fundamental length variables prevalent in metric formulations. Within 4D discrete gravity, particularly based on triangulations, the area-length system establishes a relationship between area variables associated with triangles and the edge length variables. This system is comprised of polynomial equations derived from Heron’s formula, which relates the area of a triangle to its edge lengths. Using tools from numerical algebraic geometry, we study the area-length systems. In particular, we show that given the ten triangular areas of a single 4-simplex, there could be up to 64 compatible sets of edge lengths. Moreover, we show that these 64 solutions do not, in general, admit formulae in terms of the areas by analyzing the Galois group, or monodromy group, of the problem. We show that by introducing additional symmetry constraints, it is possible to obtain such formulae for the edge lengths. We take the first steps toward applying our results within discrete quantum gravity, specifically for effective spin foam models.

Symmetry breaking mechanisms of the 3BF action for the Standard Model coupled to gravity

  • Authors: Pavle Stipsic, Marko Vojinovic
  • Subjects: High Energy Physics - Theory (hep-th); General Relativity and Quantum Cosmology (gr-qc)
  • Arxiv link: https://arxiv.org/abs/2402.17675
  • Abstract We study the details of the explicit and spontaneous symmetry breaking of the constrained 3BF action representing the Standard Model coupled to Einstein-Cartan gravity. First we discuss how each particular constraint breaks the original symmetry of the topological 3BF action. Then we investigate the spontaneous symmetry breaking and the Higgs mechanism for the electroweak theory in the constrained 3BF form, in order to demonstrate that they can indeed be performed in the framework of higher gauge theory. A formulation of the Proca action as a constrained 3BF theory is also studied in detail.
  1. [2402.17024] - Quantum gravity with dynamical wave-function collapse via a classical scalar field - Zachary Weller-Davies

Wed - 02/28/24

One-loop quantization of Euclidean D3-branes in holographic backgrounds

  • Authors: Fridrik Freyr Gautason, Jesse van Muiden
  • Subjects: High Energy Physics - Theory (hep-th)
  • Arxiv link: https://arxiv.org/abs/2402.16779
  • Abstract In this note we analyze the semi-classical quantization of D3 branes in three different holographic backgrounds in type IIB string theory. The first background is Euclidean AdS$_5$ with $S^1\times S^3$ boundary accompanied with a twist to preserve supersymmetry. We work out the spectrum of fluctuations around the classical D3-brane configuration, compute its one-loop partition function, and match to the non-perturbative correction to the superconformal index of ${\cal N}=4$ SYM. We then study Euclidean D3-branes in the Pilch-Warner geometry dual to the IR Leigh-Strassler fixed point of ${\cal N}=1^*$ with the aim to find non-perturbative corrections to its index. Finally we study Euclidean D3-branes in the non-geometric ${\cal N}=2$ J-fold background which is dual to the gauging of 3D Gaiotto-Witten SCFT.

There is no new related paper today

  1. [2402.15549] - On the Generalized Lemaitre Tolman Bondi Metric: Classical Sensitivities and Quantum Einstein-Vaz Shells - Mohammadreza Molaei, Christian Corda

  2. [2402.16136] - Analogue simulations of quantum gravity with fluids - Samuel L. Braunstein, Mir Faizal, Lawrence M. Krauss, Francesco Marino, Naveed A. Shah

  3. [2402.16100] - Notes on the Exact RG equation and the Wheeler-DeWitt equation - Hideto Kamei

Tue - 02/27/24

Quasinormal modes of a regular black hole with sub-Planckian curvature

  • Authors: Dan Zhang, Huajie Gong, Guoyang Fu, Jian-Pin Wu, Qiyuan Pan
  • Subjects: General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)
  • Arxiv link: https://arxiv.org/abs/2402.15085
  • Abstract This paper explores the properties of the quasinormal modes (QNMs) of a regular black hole(BH) characterized by a Minkowski core and sub-Planckian curvature. When focusing on a special case, this regular BH exhibits identical large-scale behavior with the Hayward BH and some loop quantum gravity corrected (LQG-corrected) BH. A notable characteristic of the QNMs in this regular BH is the pronounced outburst of overtones when compared to the Schwarzschild BH (SS-BH). This outburst can be attributed to the deviation from the SS-BH in the near-horizon geometry region due to the quantum gravity effect. Furthermore, we compare the QNM properties of the regular BH with those of the Hayward BH and the LQG-corrected BH. A similar phenomenon of overtone outburst is observed in the modes of the overtone. As a conclusion, the QNMs may be a powerful tool for detecting the quantum gravity effect and distinguishing different BH models.

There is no new related paper today

  1. [2402.14912] - Kasner Eons - Pablo Bueno, Pablo A. Cano, Robie A. Hennigar

  2. [2402.14913] - Mass inflation without Cauchy horizons - Raúl Carballo-Rubio, Francesco Di Filippo, Stefano Liberati, Matt Visser

Mon - 02/26/24

Effects of underlying topology on quantum state discrimination

  • Authors: Aatif Kaisar Khan, Yasir Hassan Dar, Elias C. Vagenas, Salman Sajad Wani, Saif Al-Kuwari, Mir Faizal
  • Subjects: General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)
  • Arxiv link: https://arxiv.org/abs/2402.14109
  • Abstract In this work, we show that quantum state discrimination can be modified due to a change in the underlying topology of a system. In particular, we explicitly demonstrate that the quantum state discrimination of systems with underlying discrete topology differs from that of systems with underlying continuous topology. Such changes in the topology of a spacetime can occur in certain quantum gravity approaches. In fact, all approaches to quantum gravity can be classified into two types: those with underlying continuous topology (such as string theory) and those with an underlying discrete topology (such as loop quantum gravity). We demonstrate that the topology of these two types of quantum gravity approaches has different effects on the quantum state discrimination of low-energy quantum systems. We also show that any modification of quantum mechanics, which does not change the underlying topology, does not modify quantum state discrimination.

There is no new related paper today

  1. [2402.14190] - Shadow and greybody bounding of a regular scale-dependent black hole solution - Ali Övgün, Reggie C. Pantig, Ángel Rincón

  2. [2402.14235] - Lagrangian partition functions subject to a fixed spatial volume constraint in the Lovelock theory - Mengqi Lu, Robert B. Mann

  3. [2402.14785] - Path integral and conformal instability in nonlocal quantum gravity - Gianluca Calcagni, Leonardo Modesto

New papers last week