scholarly journals Hawking temperature and phonon emission in acoustic holes

2021 ◽  
Vol 103 (7) ◽  
Author(s):  
Massimo Mannarelli ◽  
Dario Grasso ◽  
Silvia Trabucco ◽  
Maria Luisa Chiofalo
Keyword(s):  
Hawking Temperature ◽  
Phonon Emission

scholarly journals Modification to the Hawking temperature of a dynamical black hole by a flow-induced supertranslation

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Hsu-Wen Chiang ◽  
Yu-Hsien Kung ◽  
Pisin Chen
Keyword(s):  
Black Hole ◽  
Coordinate Transformation ◽  
Information Loss ◽  
Hawking Temperature ◽  
Asymptotic Region ◽  
Unruh Effect ◽  
Anisotropic Flow ◽  
Information Loss Paradox ◽  
History Of ◽  
Entire History

Abstract One interesting proposal to solve the black hole information loss paradox without modifying either general relativity or quantum field theory, is the soft hair, a diffeomorphism charge that records the anisotropic radiation in the asymptotic region. This proposal, however, has been challenged, given that away from the source the soft hair behaves as a coordinate transformation that forms an Abelian group, thus unable to store any information. To maintain the spirit of the soft hair but circumvent these obstacles, we consider Hawking radiation as a probe sensitive to the entire history of the black hole evaporation, where the soft hairs on the horizon are induced by the absorption of a null anisotropic flow, generalizing the shock wave considered in [1, 2]. To do so we introduce two different time-dependent extensions of the diffeomorphism associated with the soft hair, where one is the backreaction of the anisotropic null flow, and the other is a coordinate transformation that produces the Unruh effect and a Doppler shift to the Hawking spectrum. Together, they form an exact BMS charge generator on the entire manifold that allows the nonperturbative analysis of the black hole horizon, whose surface gravity, i.e. the Hawking temperature, is found to be modified. The modification depends on an exponential average of the anisotropy of the null flow with a decay rate of 4M, suggesting the emergence of a new 2-D degree of freedom on the horizon, which could be a way out of the information loss paradox.

scholarly journals Analogue Hawking temperature of a laser-driven plasma

2021 ◽  
Vol 403 ◽  
pp. 127380
Author(s):  
C. Fiedler ◽  
D.A. Burton
Keyword(s):  
Hawking Temperature

Phonon Decay in GaN and AlN and Self-Heating in III-N Devices

2006 ◽  
Vol 955 ◽  
Author(s):  
Mark Holtz ◽  
D. Y. Song ◽  
S. A. Nikishin ◽  
V. Soukhoveev ◽  
A. Usikov ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Temperature Dependence ◽  
High Quality ◽  
Self Heating ◽  
Phonon Emission ◽  
Decay Properties ◽  
Phonon Properties

ABSTRACTWe report studies of the temperature dependence of Raman lines in high quality GaN and AlN. The temperature dependence of the phonon energies and linewidths are used to produce consistent phonon decay properties of zone center optic phonons. In GaN we observe the E22 phonon to decay into three phonons, while the A1(LO) phonon is well described according to the so-called Ridley process – one TO and one LA phonon. For AlN the E22 phonon decays by two phonon emission and the A1(LO) line also exhibits a dependence consistent with the Ridley process. Along with the phonon decay processes, it is important in each case to take into account the contribution of the thermal expansion, including the temperature dependence, to describe observed temperature shifts in the phonon properties.

Field-induced 2D-3D carrier transfer and phonon emission in delta -doped GaAs

1994 ◽  
Vol 9 (5S) ◽  
pp. 835-839 ◽  
Author(s):  
M Asche ◽  
R Hey ◽  
M Horicke ◽  
T Ihn ◽  
P Kleinert ◽  
...  
Keyword(s):  
Carrier Transfer ◽  
Phonon Emission

scholarly journals Phonon emission by quasiparticle decay in superconducting tunnel junctions

1970 ◽  
Vol 31 (8) ◽  
pp. 475-476 ◽  
Author(s):  
H. Kinder ◽  
K. Laszmann ◽  
W. Eisenmenger
Keyword(s):  
Tunnel Junctions ◽  
Superconducting Tunnel Junctions ◽  
Phonon Emission

Relaxation of localized excitons by phonon emission at oxygen vacancies in Cu2O

2014 ◽  
Vol 155 ◽  
pp. 65-69 ◽  
Author(s):  
Sandhaya Koirala ◽  
Mitsuyoshi Takahata ◽  
Yuji Hazama ◽  
Nobuko Naka ◽  
Koichiro Tanaka
Keyword(s):  
Oxygen Vacancies ◽  
Phonon Emission ◽  
Localized Excitons
Sign in / Sign up

Export Citation Format

Share Document