On negative mass in inflating universes

2015 ◽  
Vol 93 (9) ◽  
pp. 966-967 ◽  
Author(s):  
Jonathan Belletête ◽  
Saoussen Mbarek ◽  
M.B. Paranjape
Keyword(s):  
Early Universe ◽  
De Sitter Space ◽  
De Sitter ◽  
Negative Mass ◽  
Physical Sense

We consider negative mass solutions in inflating universes. These universes correspond to asymptotically de Sitter space–times. We show that negative mass makes perfect physical sense and could be of relevance in the early universe.

scholarly journals Stable, thin wall, negative mass bubbles in de Sitter space-time

2020 ◽  
Vol 52 (8) ◽  
Author(s):  
Matthew C. Johnson ◽  
M. B. Paranjape ◽  
Antoine Savard ◽  
Natalia Tapia-Arellano
Keyword(s):  
De Sitter Space ◽  
Space Time ◽  
Thin Wall ◽  
De Sitter ◽  
Negative Mass

scholarly journals Formation of Conserved Charge at the de Sitter Space

Particles ◽  
2020 ◽  
Vol 3 (2) ◽  
pp. 355-363
Author(s):  
Valery V. Nikulin ◽  
Polina M. Petriakova ◽  
Sergey G. Rubin
Keyword(s):  
Early Universe ◽  
Extra Dimensions ◽  
De Sitter Space ◽  
Lepton Number ◽  
Relaxation Processes ◽  
Two Dimensional ◽  
Charge Accumulation ◽  
De Sitter ◽  
Extra Space

The article considers a new mechanism of charge accumulation in the early Universe in theories with compact extra dimensions. The relaxation processes in the extra space metric that take place during its formation lead to the establishment of symmetrical extra space configuration. As a result, the initial accumulation of the number associated with the symmetry occurs. We demonstrate this mechanism using a simple example of a two-dimensional apple-like extra space metric with U ( 1 ) -symmetry. The conceptual idea of the mechanism can be used to develop a model for the production of the baryon or lepton number in the early Universe.

scholarly journals Stable, Thin Wall, Negative Mass Bubbles in de Sitter Space-Time

2020 ◽  
pp. 475-479
Author(s):  
Matthew C. Johnson ◽  
M. B. Paranjape ◽  
Antoine Savard ◽  
Natalia Tapia-Arellano
Keyword(s):  
De Sitter Space ◽  
Space Time ◽  
Thin Wall ◽  
De Sitter ◽  
Negative Mass

The localizability of particles in de Sitter space

1971 ◽  
Vol 70 (2) ◽  
pp. 283-302 ◽  
Author(s):  
K. C. Hannabuss
Keyword(s):  
De Sitter Space ◽  
Geometrical Interpretation ◽  
Iwasawa Decomposition ◽  
Poincaré Group ◽  
De Sitter ◽  
Negative Mass ◽  
Sitter Group ◽  
Poincare Group

AbstractMotivated by the Iwasawa decomposition and its geometrical interpretation, two new decompositions of the de Sitter group are obtained. The first is applied to construct the representations of the de Sitter group in a form immediately comparable with those of the Poincaré group. In particular they act on functions over an hyperboloid like the momentum hyperboloid of the Poincaré group, although they require both positive and negative mass shells of that hyperboloid. Using the second decomposition it is shown that the representations of the de Sitter group are localizable in the sense of Mackey and Wightman. Position operators are exhibited.

scholarly journals Gravitational turbulent instability of anti-de Sitter space

2012 ◽  
Vol 29 (19) ◽  
pp. 194002 ◽  
Author(s):  
Óscar J C Dias ◽  
Gary T Horowitz ◽  
Jorge E Santos
Keyword(s):  
De Sitter Space ◽  
De Sitter

scholarly journals Open quantum entanglement: a study of two atomic system in static patch of de Sitter space

2020 ◽  
Vol 80 (8) ◽  
Author(s):  
Samim Akhtar ◽  
Sayantan Choudhury ◽  
Satyaki Chowdhury ◽  
Debopam Goswami ◽  
Sudhakar Panda ◽  
...  
Keyword(s):  
Scalar Field ◽  
Density Matrix ◽  
Master Equation ◽  
Quantum Entanglement ◽  
De Sitter Space ◽  
Thermal Bath ◽  
Massless Scalar Field ◽  
De Sitter ◽  
Open Quantum ◽  
Non Locality

Abstract In this work, our prime objective is to study non-locality and long range effect of two body correlation using quantum entanglement from various information theoretic measure in the static patch of de Sitter space using a two body Open Quantum System (OQS). The OQS is described by a system of two entangled atoms, surrounded by a thermal bath, which is modelled by a massless probe scalar field. Firstly, we partially trace over the bath field and construct the Gorini Kossakowski Sudarshan Lindblad (GSKL) master equation, which describes the time evolution of the reduced subsystem density matrix. This GSKL master equation is characterized by two components, these are-Spin chain interaction Hamiltonian and the Lindbladian. To fix the form of both of them, we compute the Wightman functions for probe massless scalar field. Using this result alongwith the large time equilibrium behaviour we obtain the analytical solution for reduced density matrix. Further using this solution we evaluate various entanglement measures, namely Von-Neumann entropy, R$$e'$$e′nyi entropy, logarithmic negativity, entanglement of formation, concurrence and quantum discord for the two atomic subsystem on the static patch of De-Sitter space. Finally, we have studied violation of Bell-CHSH inequality, which is the key ingredient to study non-locality in primordial cosmology.

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