Polymer Representations in Theoretical and Mathematical Physics

A special issue of Mathematics (ISSN 2227-7390). This special issue belongs to the section "Mathematical Physics".

Deadline for manuscript submissions: 30 September 2024 | Viewed by 1360

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Faculdade de Ciências, Universidade da Beira Interior, Rua Marquês d’Ávila e Bolama, 6201-001 Covilhã, Portugal
Interests: mathematical physics; loop quantum gravity; quantum cosmology; quantum fields in curved spacetime
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Special Issue Information

Dear Colleagues,

Representations of the Canonical Commutation Relations (CCR) other than (i.e., not unitarily equivalent to) the usual Schrodinger representation have long since found applications in areas of solid-state physics and field theory. The interest in this type of representation and, in particular, in what is now known as the polymer representation nevertheless grew tremendously after the development of Loop Quantum Cosmology, an approach to Quantum Cosmology inspired by Loop Quantum Gravity. Although the main application is still in Quantum Cosmology, the polymer type of quantization has recently been applied in other areas of Gravitation, notably in Black Hole physics, but also applications to gravitational waves and Statistical Physics can be found in the recent literature. Moreover, more formal aspects have been addressed, and relations with other areas of Mathematical Physics have been explored.

In this Special Issue, we welcome all contributions related to the polymer representation of the CCR, from a true quantum mechanical approach to semi-classical or effective models inspired by the polymer quantization.

Prof. Dr. José Velhinho
Guest Editor

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32 pages, 486 KiB  
Article
An Open Scattering Model in Polymerized Quantum Mechanics
by Kristina Giesel and Michael Kobler
Mathematics 2022, 10(22), 4248; https://doi.org/10.3390/math10224248 - 13 Nov 2022
Cited by 1 | Viewed by 889
Abstract
We derive a quantum master equation in the context of a polymerized open quantum mechanical system for the scattering of a Brownian particle in an ideal gas environment. The model is formulated in a top-down approach by choosing a Hamiltonian with a coupling [...] Read more.
We derive a quantum master equation in the context of a polymerized open quantum mechanical system for the scattering of a Brownian particle in an ideal gas environment. The model is formulated in a top-down approach by choosing a Hamiltonian with a coupling between the system and environment that is generally associated with spatial decoherence. We extend the existing work on such models by using a non-standard representation of the canonical commutation relations, inspired by the quantization procedure applied in loop quantum gravity, which yields a model in which position operators are replaced by holonomies. The derivation of the master equation in a top-down approach opens up the possibility to investigate in detail whether the assumptions, usually used in such models in order to obtain a tractable form of the dissipator, hold also in the polymerized case or whether they need to be dropped or modified. Furthermore, we discuss some physical properties of the master equation associated to effective equations for the expectation values of the fundamental operators and compare our results to the already existing models of collisional decoherence. Full article
(This article belongs to the Special Issue Polymer Representations in Theoretical and Mathematical Physics)
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