scholarly journals Ramp-up of Hawking Radiation in Bose-Einstein-Condensate Analog Black Holes

2021 ◽  
Vol 126 (11) ◽  
Author(s):  
Alessandro Fabbri ◽  
Roberto Balbinot
Keyword(s):  
Black Holes ◽  
Hawking Radiation ◽  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Bose Einstein

scholarly journals Back-Reaction in Canonical Analogue Black Holes

2020 ◽  
Vol 10 (24) ◽  
pp. 8868
Author(s):  
Stefano Liberati ◽  
Giovanni Tricella ◽  
Andrea Trombettoni
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Density Distribution ◽  
Hawking Radiation ◽  
Einstein Condensate ◽  
Back Reaction ◽  
Unitary Evolution ◽  
Black Hole Evaporation ◽  
Bose Einstein Condensate ◽  
Bose Einstein

We study the back-reaction associated with Hawking evaporation of an acoustic canonical analogue black hole in a Bose–Einstein condensate. We show that the emission of Hawking radiation induces a local back-reaction on the condensate, perturbing it in the near-horizon region, and a global back-reaction in the density distribution of the atoms. We discuss how these results produce useful insights into the process of black hole evaporation and its compatibility with a unitary evolution.

scholarly journals Black-Hole evaporation and quantum-depletion in Bose–Einstein condensates

2020 ◽  
pp. 2150006
Author(s):  
Ivan Arraut
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Temperature Regime ◽  
Hawking Radiation ◽  
Einstein Condensate ◽  
Zero Temperature ◽  
Black Hole Evaporation ◽  
Bose Einstein Condensate ◽  
Bose Einstein ◽  
Bogoliubov Transformations

We study the analogy between the Hawking radiation in Black-Holes and the quantum depletion process of a Bose–Einstein condensate by using the Bogoliubov transformations method. We find that the relation between the Bogoliubov coefficients is similar in both cases (in the appropriate regimes). We then connect the condensate variables with those associated to the Black-Hole, demonstrating then that the zero temperature regime of the condensate is equivalent to the existence of an event horizon in gravity.

scholarly journals Momentum correlations as signature of sonic Hawking radiation in Bose-Einstein condensates

2018 ◽  
Vol 4 (4) ◽  
Author(s):  
Alessandro Fabbri ◽  
Nicolas Pavloff
Keyword(s):  
Hawking Radiation ◽  
Momentum Space ◽  
Einstein Condensate ◽  
Measuring Process ◽  
One Dimensional ◽  
Bose Einstein Condensate ◽  
Momentum Correlation ◽  
Quantum Quenches ◽  
Effects Of Temperature ◽  
Bose Einstein

We study the two-body momentum correlation signal in a quasi one dimensional Bose-Einstein condensate in the presence of a sonic horizon. We identify the relevant correlation lines in momentum space and compute the intensity of the corresponding signal. We consider a set of different experimental procedures and identify the specific issues of each measuring process. We show that some inter-channel correlations, in particular the Hawking quantum-partner one, are particularly well adapted for witnessing quantum non-separability, being resilient to the effects of temperature and/or quantum quenches.

scholarly journals Mechanism of stimulated Hawking radiation in a laboratory Bose-Einstein condensate

2017 ◽  
Vol 96 (2) ◽  
Author(s):  
Yi-Hsieh Wang ◽  
Ted Jacobson ◽  
Mark Edwards ◽  
Charles W. Clark
Keyword(s):  
Hawking Radiation ◽  
Einstein Condensate ◽  
Bose Einstein Condensate ◽  
Bose Einstein

scholarly journals Supermassive Black Holes and Dark Halo from the Bose-Condensed Dark Matter

Proceedings ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 11
Author(s):  
Morikawa ◽  
Takahashi
Keyword(s):  
Black Holes ◽  
Dark Matter ◽  
Einstein Condensate ◽  
Supermassive Black Holes ◽  
Dark Halo ◽  
Bose Einstein Condensate ◽  
Bose Einstein ◽  
Mass Distribution Function ◽  
Moderate Mass ◽  
Very High

Most of the galaxies harbor supermassive Black Holes (SMBH) in their center. Some of them are observed in very high redshifts. We explore the possibility that SMBH form from the coherent waves of Bose-Einstein condensate (BEC) which are supposed to form the dark matter. We first study the isotropic and anisotropic collapses of BEC. We find the BEC wave can easily collapse to form SMBH but the realistic amount of angular momentum completely prevents the collapse. We further explore the Axion case with attractive interaction and find the moderate mass ratio between the SMBH and the dark halo around it. We also obtain the mass distribution function of BH within a single galaxy.

scholarly journals Towards the Observation of Hawking Radiation in Bose–Einstein Condensates

2003 ◽  
Vol 18 (21) ◽  
pp. 3735-3745 ◽  
Author(s):  
Carlos Barceló ◽  
Stefano Liberati ◽  
Matt Visser
Keyword(s):  
Hawking Radiation ◽  
Laval Nozzle ◽  
Einstein Condensate ◽  
Thermal Bath ◽  
Condensation Temperature ◽  
Sound Waves ◽  
Bose Einstein Condensate ◽  
Set Up ◽  
Bose Einstein ◽  
Near Future

Acoustic analogues of black holes (dumb holes) are generated when a supersonic fluid flow entrains sound waves and forms a trapped region from which sound cannot escape. The surface of no return, the acoustic horizon, is qualitatively very similar to the event horizon of a general relativity black hole. In particular Hawking radiation (a thermal bath of phonons with temperature proportional to the "surface gravity") is expected to occur. In this note we consider quasi-one-dimensional supersonic flow of a Bose–Einstein condensate (BEC) in a Laval nozzle (converging-diverging nozzle), with a view to finding which experimental settings could magnify this effect and provide an observable signal. We discuss constraints and problems for our model and identify the issues that should be addressed in the near future in order to set up an experiment. In particular we identify an experimentally plausible configuration with a Hawking temperature of order 70 n K; to be contrasted with a condensation temperature of the order of 90 n K.

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