Related papers: Closed universes in two dimensional gravity

Closed universes in two dimensional gravity

URL: http://arxiv.org/abs/2402.00098v3
Date: Wed, 14 Aug 2024 19:20:49 GMT
Title: Closed universes in two dimensional gravity
Authors: Mykhaylo Usatyuk, Zi-Yue Wang, Ying Zhao,
Abstract summary: We study closed universes in simple models of two dimensional gravity. We find a stark contrast, as well as some connections, between the perturbative and non-perturbative aspects of the theory.
Score: 5.161824521263902
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: We study closed universes in simple models of two dimensional gravity, such as Jackiw-Teiteilboim (JT) gravity coupled to matter, and a toy topological model that captures the key features of the former. We find there is a stark contrast, as well as some connections, between the perturbative and non-perturbative aspects of the theory. We find rich semi-classical physics. However, when non-perturbative effects are included there is a unique closed universe state in each theory. We discuss possible meanings and interpretations of this observation.

Related papers

Is Planckian discreteness observable in cosmology? [47.03992469282679]
A Planck scale inflationary era produces the scale invariant spectrum of inhomogeneities with very small tensor-to-scalar ratio of perturbations. Here we evoke the possibility that some of the major puzzles in cosmology would have an explanation rooted in quantum gravity.
arXiv Detail & Related papers (2024-05-21T06:53:37Z)
Testing the Braneworld Theory with Identical Particles [41.94295877935867]
braneworld scenarios postulate that the spacetime we effectively observe is actually a 4-dimensional brane embedded in a higher-dimensional spacetime. We propose an experimental test that uses a pair of gravitationally interacting identical particles to determine the validity of certain braneworld models.
arXiv Detail & Related papers (2023-09-06T16:40:12Z)
Does the Universe have its own mass? [62.997667081978825]
The mass of the universe is a distribution of non-zero values of gravitational constraints. A formulation of the Euclidean quantum theory of gravity is also proposed to determine the initial state. Being unrelated to ordinary matter, the distribution of its own mass affects the geometry of space.
arXiv Detail & Related papers (2022-12-23T22:01:32Z)
Emergence of Quantum Theory and Minkowski Spacetime [0.0]
We show that quantum theory and Minkowski spacetime may connect with each other and emerge from a single fundamental entity. We show that quantum theory and Minkowski spacetime may connect with each other and emerge from a single fundamental entity.
arXiv Detail & Related papers (2022-05-12T01:51:05Z)
A no-go theorem on the nature of the gravitational field beyond quantum theory [0.0]
Table-top experiments involving massive quantum systems have been proposed to test the interface of quantum theory and gravity. In particular, the crucial point of the debate is whether it is possible to conclude anything on the quantum nature of the gravitational field. We introduce the framework of Generalised Probabilistic Theories (GPTs) to study the nature of the gravitational field.
arXiv Detail & Related papers (2020-12-02T19:00:03Z)
Topological Quantum Gravity of the Ricci Flow [62.997667081978825]
We present a family of topological quantum gravity theories associated with the geometric theory of the Ricci flow. First, we use BRST quantization to construct a "primitive" topological Lifshitz-type theory for only the spatial metric. We extend the primitive theory by gauging foliation-preserving spacetime symmetries.
arXiv Detail & Related papers (2020-10-29T06:15:30Z)
Making a Quantum Universe: Symmetry and Gravity [0.0]
We outline the preliminary results for a model of quantum universe. We show that, in the absence of a background spacetime, this Universe is trivial and static. We identify the classical spacetime with parameter space of the Hilbert space of the Universe.
arXiv Detail & Related papers (2020-09-07T21:15:45Z)
On the quantum description of the early universe [0.0]
The study of the early era of the universe involves the ideal terrain to analyze the interface between General Relativity and Quantum physics. It is also an area in which we have a large number of observational data to test our theoretical ideas. This article will orbit around these ideas and summarizes how it is that today, from recent works, we are in a position to try to challenge them.
arXiv Detail & Related papers (2020-07-02T23:38:52Z)
Preferred basis, decoherence and a quantum state of the Universe [77.34726150561087]
We review a number of issues in foundations of quantum theory and quantum cosmology. These issues can be considered as a part of the scientific legacy of H.D. Zeh.
arXiv Detail & Related papers (2020-06-28T18:07:59Z)
Atom-interferometric test of the universality of gravitational redshift and free fall [48.82541018696971]
Light-pulse atom interferometers constitute powerful quantum sensors for inertial forces. We present a specific geometry which together with state transitions leads to a scheme that is sensitive to both violations of the universality of free fall and gravitational redshift.
arXiv Detail & Related papers (2020-01-27T13:35:30Z)

This list is automatically generated from the titles and abstracts of the papers in this site.