Zobrazeno 1 - 10
of 80
pro vyhledávání: '"Chataignier, P."'
We discuss a systematic way in which a relational dynamics can be established relative to periodic clocks both in the classical and quantum theories, emphasising the parallels between them. We show that: (1) classical and quantum relational observabl
Externí odkaz:
http://arxiv.org/abs/2409.06479
Autor:
Chataignier, Leonardo
We revisit the concept of phase time, which has been previously proposed as a solution to the problem of time in quantum gravity. Concretely, we show how the geometry of configuration space together with the phase of the wave function of the universe
Externí odkaz:
http://arxiv.org/abs/2408.08953
Autor:
Chataignier, Louis, Pain, Michel
At high temperature, the overlap of two particles chosen independently according to the Gibbs measure of the branching Brownian motion converges to zero as time goes to infinity. We investigate the precise decay rate of the probability to obtain an o
Externí odkaz:
http://arxiv.org/abs/2407.21014
Autor:
Chataignier, Louis
In this thesis, we study asymptotic properties of the standard branching Brownian motion, with a specific emphasis on the additive martingales at high temperature. We start by presenting classic and fundamental tools for our investigation. Subsequent
Externí odkaz:
http://arxiv.org/abs/2407.20227
We discuss how quantum geometrodynamics, a conservative approach to quantum gravity, might explain the emergence of classical spacetime and, with it, the emergence of classical time and its arrow from the universal quantum state. This follows from a
Externí odkaz:
http://arxiv.org/abs/2407.01727
Autor:
Casadio, Roberto, Chataignier, Leonardo, Kamenshchik, Alexander Yu., Pedro, Francisco G., Tronconi, Alessandro, Venturi, Giovanni
We make a conceptual overview of a particular approach to the initial-value problem in canonical gauge theories. We stress how the first-class phase-space constraints may be relaxed if we interpret them as fixing the values of new degrees of freedom.
Externí odkaz:
http://arxiv.org/abs/2402.12437
Publikováno v:
Class. Quantum Grav. 40, 223001 (2023)
In this review, we focus on whether a canonical quantization of general relativity can produce testable predictions for cosmology. In particular, we examine how this approach can be used to model the evolution of primordial perturbations. This progra
Externí odkaz:
http://arxiv.org/abs/2306.14948
Autor:
Chataignier, Leonardo
Publikováno v:
J. Phys.: Conf. Ser. 2533, 012029 (2023)
We review two approaches to the definition of the Hilbert space and evolution in mechanical theories with local time-reparametrization invariance, which are often used as toy models of quantum gravity. The first approach is based on the definition of
Externí odkaz:
http://arxiv.org/abs/2302.07903
Autor:
Silvia Savio Chataignier
Publikováno v:
Limaq, Iss 013, Pp 63-81 (2024)
El estudio comparado de proyectos no construidos de Jean Nouvel —Mediateca de Nîmes y Museo Guggenheim Río—, con el Palacio de Bellas Artes de Lille (Ibos y Vitart), expone las similitudes entre edificios subterráneos y explora la desorientaci
Externí odkaz:
https://doaj.org/article/7f50fac11c42447fa8dede85ce496d5f
We analyze the consequences of different evolutions of the Hubble parameter on the spectrum of scalar inflationary perturbations. The analysis is restricted to inflationary phases described by a transient evolution, when uncommon features arise in th
Externí odkaz:
http://arxiv.org/abs/2301.04477