Bipartite and tripartite entanglement in a Bose-Einstein acoustic black hole

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.

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Recent searches for continuous gravitational waves

Modern Physics Letters A ◽

10.1142/s021773231730035x ◽

2017 ◽

Vol 32 (39) ◽

pp. 1730035 ◽

Cited By ~ 43

Author(s):

Keith Riles

Keyword(s):

Black Holes ◽

Black Hole ◽

Neutron Star ◽

Gravitational Waves ◽

Gamma Ray ◽

Continuous Wave ◽

New Era ◽

Binary Neutron Star ◽

Binary Black Hole ◽

Bose Einstein

Gravitational wave astronomy opened dramatically in September 2015 with the LIGO discovery of a distant and massive binary black hole coalescence. The more recent discovery of a binary neutron star merger, followed by a gamma ray burst (GRB) and a kilonova, reinforces the excitement of this new era, in which we may soon see other sources of gravitational waves, including continuous, nearly monochromatic signals. Potential continuous wave (CW) sources include rapidly spinning galactic neutron stars and more exotic possibilities, such as emission from axion Bose Einstein “clouds” surrounding black holes. Recent searches in Advanced LIGO data are presented, and prospects for more sensitive future searches are discussed.

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Lower-dimensional corpuscular gravity and the end of black hole evaporation

Modern Physics Letters A ◽

10.1142/s0217732319501748 ◽

2019 ◽

Vol 34 (22) ◽

pp. 1950174

Author(s):

Roberto Casadio ◽

Andrea Giusti ◽

Jonas Mureika

Keyword(s):

Black Holes ◽

Black Hole ◽

Occupation Number ◽

Planck Scale ◽

Friedmann Equation ◽

Dimensional Spacetime ◽

Spatial Dimensions ◽

Bose Einstein ◽

Lower Dimensional ◽

Hawking Evaporation

Black holes in [Formula: see text] spatial dimensions are studied from the perspective of the corpuscular model of gravitation, in which black holes are described as Bose–Einstein condensates (BEC) of (virtual soft) gravitons. In particular, since the energy of these gravitons should increase as the black hole evaporates, eventually approaching the Planck scale, the lower-dimensional cases could provide important insight into the late stages and end of Hawking evaporation. We show that the occupation number of gravitons in the condensate scales holographically in all dimensions as [Formula: see text], where [Formula: see text] is the relevant length for the system in the [Formula: see text]-dimensional spacetime. In particular, this analysis shows that black holes cannot contain more than a few gravitons in [Formula: see text]. Since dimensional reduction is a common feature of many models of quantum gravity, this result can shed light on the end of the Hawking evaporation. We also consider [Formula: see text]-dimensional cosmology in the context of corpuscular gravity and show that the Friedmann equation reproduces the expected holographic scaling as in higher dimensions.

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Black-hole lasing in Bose–Einstein condensates: analysis of the role of the dynamical instabilities in a nonstationary setup

Journal of Physics B Atomic Molecular and Optical Physics ◽

10.1088/1361-6455/ab0bcb ◽

2019 ◽

Vol 52 (7) ◽

pp. 075004 ◽

Cited By ~ 1

Author(s):

J M Gomez Llorente ◽

J Plata

Keyword(s):

Black Hole ◽

Bose Einstein ◽

Dynamical Instabilities

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Remarks on Renormalization of Black Hole Entropy

International Journal of Modern Physics A ◽

10.1142/s0217751x97002802 ◽

1997 ◽

Vol 12 (29) ◽

pp. 5223-5234 ◽

Cited By ~ 11

Author(s):

Sang Pyo Kim ◽

Sung Ku Kim ◽

Kwang-Sup Soh ◽

Jae Hyung Yee

Keyword(s):

Black Hole ◽

Regularization Method ◽

Black Hole Entropy ◽

Extremal Black Hole ◽

Dirac Distribution ◽

Bose Einstein ◽

Renormalization Constants ◽

Villars Regularization

We elaborate the renormalization process of entropy of a nonextremal and an extremal Reissner–Nordström black hole by using the Pauli–Villars regularization method, in which the regulator fields obey either the Bose–Einstein or Fermi–Dirac distribution depending on their spin-statistics. The black hole entropy involves only two renormalization constants. We also discuss the entropy and temperature of the extremal black hole.

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Maxwell–Boltzmann type Hawking radiation

Modern Physics Letters A ◽

10.1142/s0217732317500717 ◽

2017 ◽

Vol 32 (12) ◽

pp. 1750071 ◽

Cited By ~ 2

Author(s):

Youngsub Yoon

Keyword(s):

Black Hole ◽

Hawking Radiation ◽

Radiation Spectrum ◽

Boltzmann Distribution ◽

Black Hole Horizon ◽

Not Given ◽

Horizon Area ◽

Einstein Distribution ◽

Bose Einstein

Twenty years ago, Rovelli proposed that the degeneracy of black hole (i.e. the exponential of the Bekenstein–Hawking entropy) is given by the number of ways the black hole horizon area can be expressed as a sum of unit areas. However, when counting the sum, one should treat the area quanta on the black hole horizon as distinguishable. This distinguishability of area quanta is noted in Rovelli’s paper. Building on this idea, we derive that the Hawking radiation spectrum is not given by Planck radiation spectrum (i.e. Bose–Einstein distribution) but given by Maxwell–Boltzmann distribution.

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