scholarly journals Late-time quantum backreaction from inflationary fluctuations of a nonminimally coupled massless scalar

2015 ◽  
Vol 91 (2) ◽  
Author(s):  
D. Glavan ◽  
T. Prokopec ◽  
D. C. van der Woude
Keyword(s):  
Massless Scalar ◽  
Late Time ◽  
Time Quantum

scholarly journals Late-time quantum backreaction of a very light nonminimally coupled scalar

2016 ◽  
Vol 94 (8) ◽  
Author(s):  
Dražen Glavan ◽  
Tomislav Prokopec ◽  
Tomo Takahashi
Keyword(s):  
Late Time ◽  
Time Quantum

scholarly journals Late-time quantum radiation by a uniformly accelerated detector in de Sitter spacetime

2018 ◽  
Vol 98 (10) ◽  
Author(s):  
Shumpei Yamaguchi ◽  
Rumi Tatsukawa ◽  
Shih-Yuin Lin ◽  
Kazuhiro Yamamoto
Keyword(s):  
Late Time ◽  
De Sitter Spacetime ◽  
De Sitter ◽  
Sitter Spacetime ◽  
Quantum Radiation ◽  
Time Quantum

scholarly journals LATE-TIME TAIL OF A COUPLED SCALAR FIELD IN THE BACKGROUND OF A BLACK HOLE WITH A GLOBAL MONOPOLE

2008 ◽  
Vol 23 (05) ◽  
pp. 359-369 ◽  
Author(s):  
SONGBAI CHEN ◽  
JILIANG JING
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Scalar Fields ◽  
Massless Scalar ◽  
Late Time ◽  
Massless Scalar Field ◽  
Global Monopole ◽  
Massive Scalar Field ◽  
Gravitational Fields ◽  
Field Decay

Using the technique of spectral decomposition, we investigated the late-time tails of massless and massive coupled scalar fields in the background of a black hole with a global monopole. We found that due to the existence of the coupling between the scalar and gravitational fields, the massless scalar field decay faster at timelike infinity i+, and so does the massive one in the intermediate late time. But the asymptotically late-time tail for the massive scalar field is not affected and its decay rate is still t-5/6.

scholarly journals Reply to comment on ‘Late-time tails of a self-gravitating massless scalar field, revisited’

2009 ◽  
Vol 26 (24) ◽  
pp. 248002
Author(s):  
Piotr Bizoń ◽  
Tadeusz Chmaj ◽  
Andrzej Rostworowski
Keyword(s):  
Scalar Field ◽  
Massless Scalar ◽  
Late Time ◽  
Massless Scalar Field

scholarly journals LATE TIME DECAY OF THE FALSE VACUUM, MEASUREMENT, AND QUANTUM COSMOLOGY

2008 ◽  
Vol 17 (13n14) ◽  
pp. 2501-2505 ◽  
Author(s):  
LAWRENCE M. KRAUSS ◽  
GLENN D. STARKMAN ◽  
JAMES DENT
Keyword(s):  
Quantum Cosmology ◽  
Quantum Dynamics ◽  
Probability Measures ◽  
Late Time ◽  
Time Decay ◽  
False Vacuum ◽  
Vacuum Measurement ◽  
Recent Suggestion ◽  
Eternal Inflation ◽  
Time Quantum

The recent suggestion that late time quantum dynamics may be important for resolving cosmological issues associated with our observed universe requires a consideration of several subtle issues associated with quantum cosmology, as we describe here. The resolution of these issues will be important if we are to be able to properly ascribe probability measures associated with eternal inflation, and a string landscape.

scholarly journals Gravitational Collapse of Massless Fields in an Expanding Universe

2018 ◽  
Vol 168 ◽  
pp. 02002 ◽  
Author(s):  
Chul-Moon Yoo
Keyword(s):  
Boundary Condition ◽  
Scalar Field ◽  
Gravitational Collapse ◽  
Periodic Boundary Condition ◽  
Periodic Boundary ◽  
Integrability Condition ◽  
Massless Scalar ◽  
Late Time ◽  
Massless Scalar Field ◽  
Initial Amplitude

Gravitational collapse of a massless scalar field with the periodic boundary condition in a cubic box is reported. This system can be regarded as a lattice universe model. The initial data is constructed for a Gaussian like profile of the scalar field taking the integrability condition associated with the periodic boundary condition into account. For a large initial amplitude, a black hole is formed after a certain period of time. While the scalar field spreads out in the whole region for a small initial amplitude. The difference of the late time expansion law of the lattice universe depending on the final fate of the gravitational collapse is discussed.

Dark Energy due to Late Time Quantum Decay Process

2010 ◽  
Author(s):  
A. de la Macorra ◽  
F. Briscese ◽  
Jean-Michel Alimi ◽  
André Fuözfa
Keyword(s):  
Dark Energy ◽  
Decay Process ◽  
Late Time ◽  
Time Quantum

scholarly journals CASIMIR EFFECT FOR A SPHERICAL SHELL IN DE SITTER SPACE–TIME WITH SIGNATURE CHANGE

2008 ◽  
Vol 17 (12) ◽  
pp. 2261-2268
Author(s):  
M. R. SETARE ◽  
F. DARABI
Keyword(s):  
Spherical Shell ◽  
Casimir Effect ◽  
Scalar Fields ◽  
Dirichlet Boundary Conditions ◽  
Massless Scalar ◽  
Late Time ◽  
De Sitter ◽  
Signature Change ◽  
Sitter Background ◽  
Cosmological Constants

We calculate the Casimir stress on a spherical shell in a de Sitter background corresponding to different metric signatures and cosmological constants, for massless scalar fields that satisfy Dirichlet boundary conditions on the shell. We show that a contribution appears due to signature change, which leads to late-time expansion of the bubbles in this background.

scholarly journals Gaussian null coordinates, near-horizon geometry and conserved charges on the horizon of extremal nondilatonic black p-branes

2020 ◽  
Vol 29 (11) ◽  
pp. 2041004
Author(s):  
Mirjam Cvetič ◽  
Paulo J. Porfírio ◽  
Alejandro Satz
Keyword(s):  
Scalar Field ◽  
Massless Scalar ◽  
Late Time ◽  
Massless Scalar Field ◽  
Conserved Quantities ◽  
Field Equations ◽  
Conserved Charges ◽  
Time Regime ◽  
Horizon Geometry ◽  
The Impact

In this paper, we examine the emergence of conserved charges on the horizon of a particular class of extremal nondilatonic black [Formula: see text]-branes (which reduce to extremal dilatonic black holes in [Formula: see text] dimensions upon toroidal compactification) in the presence of a probe massless scalar field in the bulk. This result is achieved by writing the black [Formula: see text]-brane geometry in a Gaussian null coordinate system which allows us to get a nonsingular near-horizon geometry description. We find that the near-horizon geometry is [Formula: see text] and that the [Formula: see text] section has an internal structure which can be seen as a warped product of [Formula: see text] in Gaussian null coordinates. We show that the bulk scalar field satisfying the field equations is expanded in terms of nonnormalizable and normalizable modes, which for certain suitable quantization conditions are well-behaved at the boundary of [Formula: see text] space. Furthermore, we show that picking the normalizable modes results in the existence of conserved quantities on the horizon. We discuss the impact of these conserved quantities in the late-time regime.

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