Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/72986
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Two faces of quantum sound |
Autor: | Barceló, Carlos CSIC ORCID; Garay, Luis Javier CSIC ORCID; Jannes, Gil CSIC ORCID | Fecha de publicación: | 2010 | Editor: | American Physical Society | Citación: | Physical Review D - Particles, Fields, Gravitation and Cosmology 82 (2010) | Resumen: | Fluctuations around a Bose-Einstein condensate can be described by means of Bogolubov theory leading to the notion of quasiparticle and antiquasiparticle familiar to nonrelativistic condensed-matter practitioners. On the other hand, we already know that these perturbations evolve according to a relativistic Klein-Gordon equation in the long-wavelength approximation. For shorter wavelengths, we show that this equation acquires nontrivial corrections which modify the Klein-Gordon product. In this approach, quasiparticles can also be defined (up to the standard ambiguities due to observer dependence). We demonstrate that-in the low-energy as well as in the high-energy regimes-both concepts of quasiparticle are actually the same, regardless of the formalism (Bogolubov or Klein-Gordon) used to describe them. These results also apply to any barotropic, inviscid, irrotational fluid, with or without quantum potential. Finally, we illustrate how the quantization of these systems of quasiparticles proceeds by analyzing a stationary configuration containing an acoustic horizon. We show that there are several possible choices of a regular vacuum state, including a regular generalization of the Boulware vacuum. Issues such us Hawking radiation crucially depend on this vacuum choice. © 2010 The American Physical Society. | URI: | http://hdl.handle.net/10261/72986 | DOI: | 10.1103/PhysRevD.82.044042 | Identificadores: | doi: 10.1103/PhysRevD.82.044042 issn: 1550-7998 |
Aparece en las colecciones: | (IAA) Artículos (CFMAC-IEM) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Barcelo2.pdf | 298,6 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
11
checked on 12-abr-2024
WEB OF SCIENCETM
Citations
11
checked on 26-feb-2024
Page view(s)
229
checked on 19-abr-2024
Download(s)
181
checked on 19-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.