Quantum structure of spacetime and blackhole entropy
نویسنده
چکیده
The gap between a microscopic theory for quantum spacetime and the semiclassical physics of blackholes is bridged by treating the blackhole spacetimes as highly excited states of a class of nonlocal field theories. All the blackhole thermodynamics is shown to arise from asymptotic form of the dispersion relation satisfied by the elementary excitations of these field theories. These models involve, quite generically, fields which are: (i) smeared over regions of the order of Planck length and (ii) possess correlation functions which have universal short distance behaviour.
منابع مشابه
THERMODYNAMICS AND/OF HORIZONS: A COMPARISON OF SCHWARZSCHILD, RINDLER AND deSITTER SPACETIMES
The notions of temperature, entropy and ‘evaporation’, usually associated with spacetimes with horizons, are analyzed using general approach and the following results, applicable to different spacetimes, are obtained at one go. (i) The concept of temperature associated with the horizon is derived in a unified manner and is shown to arise from purely kinematic considerations. (ii) QFT near any h...
متن کاملThird Quantization and Black Holes
Recent results on the quantum mechanics of black holes indicate that the spacetime singularity can be avoided if the space of fields is extended in its domain as well as the vanishing of beta functions required as an equation in target space. Such an approach seems to inevitably lead to the quantization in this space that is the so-called third quantization. We discuss some of the implications ...
متن کاملString Junctions and Bound States of Intersecting Branes
We study four-dimensional black hole configurations which result from wrapping M5-branes on a Calabi-Yau manifold, as well as Udual realizations. Our aim is to understand the microscopic degrees of freedom responsible for the existence of bound states of multiple branes. The details depend on the chosen U-frame; in some cases, they are massless string junctions. We also identify a perturbative ...
متن کاملEvidence of Blackhole Entropy
The natural outcome of the most striking similarity between the second laws of blackhole mechanics and thermodynamics is blackhole entropy. In this paper we discuss the evidence of blackhole entropy and the linearity relation between blackhole entropy to its horizon area. Finally, using thermodynamic relations we obtain Bekenstein-Hawking entropy, Hawking temperature and other intensive paramet...
متن کاملCoherent Control of Quantum Entropy via Quantum Interference in a Four-Level Atomic System
The time evaluation of quantum entropy in a four-level double- type atomic system is theoretically investigated. Quantum entanglement of the atom and its spontaneous emission fields is then discussed via quantum entropy. It is found that the degree of entanglement can be increased by the quantum interference induced by spontaneous emission. The phase dependence of the atom-field entanglement is...
متن کامل