Antioscillons from bubble collisions at finite temperature

2014 ◽  
Vol 23 (06) ◽  
pp. 1450055
Author(s):  
Laura Mersini-Houghton
Keyword(s):  
Finite Temperature ◽  
Cylindrical Symmetry ◽  
False Vacuum ◽  
Vacuum Decay ◽  
Twisted Field

We study the role of the topology of bubbles at finite temperatures plays on collisions and the existence of new field configurations. We show that in the case of false vacuum decay at finite temperature, the cylindrical symmetry of bubbles admits a new exotic field with negative energies, the antiperiodic "twisted" field. New field configurations arise generically, not only at finite temperatures but whenever a cluster of bubbles resulting from collisions form nontrivial topologies. The interaction of both configurations induces instabilites on the bubble. Collisions of bubbles occupied by the new fields can lead to the emergence of new structures, named antioscillons.

O(3)-invariant tunnelling at false vacuum decay in general relativity

1991 ◽  
Vol T36 ◽  
pp. 269-275 ◽  
Author(s):  
V A Berezin ◽  
V A Kuzmin ◽  
I I Tkachev
Keyword(s):  
General Relativity ◽  
False Vacuum ◽  
Vacuum Decay

scholarly journals False vacuum decay in kink scattering

2018 ◽  
Vol 2018 (10) ◽  
Author(s):  
Adalto R. Gomes ◽  
F. C. Simas ◽  
K. Z. Nobrega ◽  
P. P. Avelino
Keyword(s):  
False Vacuum ◽  
Vacuum Decay

scholarly journals Exact one-loop false vacuum decay rate

2020 ◽  
Vol 102 (12) ◽  
Author(s):  
Victor Guada ◽  
Miha Nemevšek
Keyword(s):  
Decay Rate ◽  
False Vacuum ◽  
Vacuum Decay

scholarly journals On catalyzed vacuum decay around a radiating black hole and the crisis of the electroweak vacuum

2020 ◽  
Vol 2020 (8) ◽  
Author(s):  
Takumi Hayashi ◽  
Kohei Kamada ◽  
Naritaka Oshita ◽  
Jun’ichi Yokoyama
Keyword(s):  
Black Hole ◽  
Scalar Field ◽  
Standard Model ◽  
Decay Rate ◽  
Early Universe ◽  
Hawking Radiation ◽  
False Vacuum ◽  
Vacuum Decay ◽  
Higgs Vacuum ◽  
The Standard Model

Abstract False vacuum decay is a key feature in quantum field theories and exhibits a distinct signature in the early Universe cosmology. It has recently been suggested that the false vacuum decay is catalyzed by a black hole (BH), which might cause the catastrophe of the Standard Model Higgs vacuum if primordial BHs are formed in the early Universe. We investigate vacuum phase transition of a scalar field around a radiating BH with taking into account the effect of Hawking radiation. We find that the vacuum decay rate slightly decreases in the presence of the thermal effect since the scalar potential is stabilized near the horizon. However, the stabilization effect becomes weak at the points sufficiently far from the horizon. Consequently, we find that the decay rate is not significantly changed unless the effective coupling constant of the scalar field to the radiation is extremely large. This implies that the change of the potential from the Hawking radiation does not help prevent the Standard Model Higgs vacuum decay catalyzed by a BH.

scholarly journals Functional methods for false-vacuum decay in real time

2019 ◽  
Vol 2019 (12) ◽  
Author(s):  
Wen-Yuan Ai ◽  
Björn Garbrecht ◽  
Carlos Tamarit
Keyword(s):  
Real Time ◽  
False Vacuum ◽  
Vacuum Decay ◽  
Functional Methods

scholarly journals 3D MHD simulations and synthetic radio emission from an oblique rotating magnetic massive star

2019 ◽  
Vol 489 (3) ◽  
pp. 3251-3268
Author(s):  
S Daley-Yates ◽  
I R Stevens ◽  
A ud-Doula
Keyword(s):  
Mass Loss ◽  
Massive Star ◽  
Thermal Emission ◽  
Mass Loss Rate ◽  
Cylindrical Symmetry ◽  
Phase Dependence ◽  
Spectral Flux ◽  
Oblique Rotator ◽  
Spherical And Cylindrical Symmetry

ABSTRACT We have performed 3D isothermal MHD simulation of a magnetic rotating massive star with a non-zero dipole obliquity and predicted the radio/sub-mm observable light curves and continuum spectra for a frequency range compatible with ALMA. From these results we also compare the model input mass-loss to that calculated from the synthetic thermal emission. Spherical and cylindrical symmetry is broken due to the obliquity of the stellar magnetic dipole resulting in an inclination and phase dependence of both the spectral flux and inferred mass-loss rate, providing testable predictions of variability for oblique rotator. Both quantities vary by factors between 2 and 3 over a full rotational period of the star, demonstrating that the role of rotation as critical in understanding the emission. This illustrates the divergence from a symmetric wind, resulting in a two-armed spiral structure indicative of an oblique magnetic rotator. We show that a constant spectral index, α, model agrees well with our numerical prediction for a spherical wind for ν < 103 GHz; however it is unable to capture the behaviour of emission at ν > 103 GHz. As such we caution the use of such constant α models for predicting emission from non-spherical winds such as those which form around magnetic massive stars.

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