Título:	Impact of trans-Planckian excitations on black-hole radiation in dipolar condensates
Autor(es):	Ribeiro, Caio Cesar Holanda Fischer, Uwe R.
ORCID:	https://orcid.org/0000-0002-9874-9639
Afiliação do autor:	Seoul National University, Department of Physics and Astronomy, Center for Theoretical Physics University of Brasilia, Institute of Physics Seoul National University, Department of Physics and Astronomy, Center for Theoretical Physics
Assunto:	Condensados ​​de Bose-Einstein Buracos negros (Astronomia)
Data de publicação:	21-Jun-2023
Editora:	American Physical Society
Referência:	RIBEIRO, Caio C. Holanda; FISCHER, Uwe R. Impact of trans-Planckian excitations on black-hole radiation in dipolar condensates. Physical Review D, [S. l.], v. 107, L121502, 2023. DOI: https://doi.org/10.1103/PhysRevD.107.L121502.
Abstract:	We consider a quasi-one-dimensional dipolar condensate in a steplike analog black hole setup. It is shown that the existence of roton excitations leaves significant imprints onto the Hawking radiation spectrum. The emitted radiation depends on the depth of the roton minimum, and is in general more intense. In addition, we find a novel spontaneous particle creation mechanism with no counterpart in nondipolar condensates. Our results establish that dipolar condensates offer a richer and more versatile environment for the simulation of particle production from the quantum vacuum in the presence of horizon interfaces than contact-interaction condensates.
Unidade Acadêmica:	Instituto de Física (IF)
DOI:	https://doi.org/10.1103/PhysRevD.107.L121502
Versão da editora:	https://journals.aps.org/prd/abstract/10.1103/PhysRevD.107.L121502
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