Space-like Singularities and Thermalization
نویسنده
چکیده
We conjecture that space-like singularities are simply regions in which all available degrees of freedom are excited, and the system cycles randomly through generic quantum states in its Hilbert space. There is no simple geometric description of the interior of such a region, but if it is embedded in a semi-classical space-time an external observer sees it as a black hole. Big Bang and Crunch singularities, for which there is no such embedding, must be described in purely quantum terms. We present several possible descriptions of such cosmologies.
منابع مشابه
v 2 1 N ov 1 99 4 MIT - CTP - 2374 10 / 94 THERMALIZATION AND PINCH SINGULARITIES IN NON - EQUILIBRIUM QUANTUM FIELD THEORY
I argue that, within the Closed-Time-Path formalism, pinch singularities do not appear in truly out of equilibrium situations.
متن کاملThermalization in the Two-Body Random Ensemble
Using the ergodicity principle for the expectation values of several types of observables, we investigate the thermalization process in isolated fermionic systems. These are described by the two-body random ensemble, which is a paradigmatic model to study quantum chaos and specially the dynamical transition from integrability to chaos. By means of exact diagonalizations we analyze the relevance...
متن کاملEmittance Growth from the Thermalization of Space-Charge Nonuniformities∗
Beams injected into a linear focusing channel typically have some degree of space-charge nonuniformity. In general, injected particle distributions with systematic charge nonuniformities are not equilibria of the focusing channel and launch a broad spectrum of collective modes. These modes can phase-mix and have nonlinear wave-wave interactions which, at high space-charge intensities, results i...
متن کاملA Brief Comment on Instanton-like Singularities and Cosmological Horizons
We argue that in the presence of instanton-like singularities, the existence of cosmological horizons can become frame-dependent, ie. a horizon which appears in Einstein frame may not appear in string frame. We speculate on the relation between instanton-like singularities and the formulation of quantum gravity in de Sitter space. e-mail address:[email protected]
متن کاملA Brief Comment on Time-like Singularities and Cosmological Horizons
We argue that in the presence of time-like singularities, the existence of cosmological horizons can become frame-dependent, ie. a horizon which appears in Einstein frame may not appear in string frame. We speculate on the relation between time-like singularities and the formulation of quantum gravity in de Sitter space. e-mail address:[email protected]
متن کامل