Uniformly accelerated classical sources as limits of Unruh-DeWitt detectors

Nenhuma Miniatura disponível

Data

2020-11-16

Orientador

Coorientador

Pós-graduação

Curso de graduação

Título da Revista

ISSN da Revista

Título de Volume

Editor

Amer Physical Soc

Tipo

Artigo

Direito de acesso

Resumo

Although the thermal and radiative effects associated with a two-level quantum system undergoing acceleration are now widely understood and accepted, a surprising amount of controversy still surrounds the simpler and older problem of an accelerated classical charge. We argue that the analogy between these systems is more than superficial; there is a sense in which a UD detector in a quantized scalar field effectively acts as a classical source for that field if the splitting of its energy levels is so small as to be ignored. After showing explicitly that a detector with unresolved inner structure does behave as a structureless scalar source, we use that analysis to rederive the scalar version of a previous analysis of the accelerated electromagnetic charge, without appealing to the troublesome concept of zero-energy particles. Then, we recover these results when the detector energy gap is taken to be zero from the beginning. This vindicates the informal terminology zero-frequency Rindler modes as a shorthand for Rindler modes with arbitrarily small energy. In an Appendix, the mathematical behavior of the normal modes in the limit of small frequency is examined in more detail than before. The vexed (and somewhat ambiguous) question of whether coaccelerating observers detect the acceleration radiation can then be studied on a sound basis.

Descrição

Palavras-chave

Idioma

Inglês

Como citar

Physical Review D. College Pk: Amer Physical Soc, v. 102, n. 10, 11 p., 2020.

Itens relacionados