Evolution of thick domain walls in inflationary and 
                
                  
                
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               universe

We study the evolution of thick domain walls in the expanding universe. We have found that the domain wall evolution crucially depends on the time-dependent parameter C(t) = 1/(H(t)δ0)2, where H(t) is the Hubble parameter and δ0 is the width of the wall in flat space-time. For C(t) > 2 the physical width of the wall, a(t)δ(t), tends with time to constant value δ0, which is microscopically small. Otherwise, when C(t) ≤ 2, the wall steadily expands and can grow up to a cosmologically large size.

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DOMAIN WALLS IN HIGHER DIMENSIONS

International Journal of Modern Physics D ◽

10.1142/s0218271898000085 ◽

1998 ◽

Vol 07 (01) ◽

pp. 81-88

Author(s):

A. BANERJEE ◽

AJANTA DAS

Keyword(s):

Energy Density ◽

Exact Solutions ◽

Domain Walls ◽

Stress Component ◽

Higher Dimensions ◽

Dimensional Spacetime ◽

Thick Domain Walls

Thick domain walls with nonvanishing stress component in the direction perpendicular to the plain of the wall are considered. Their exact solutions are obtained in the background of a five-dimensional spacetime. There may be both expanding and collapsing walls. The energy density decreases on both sides of the walls and the spacetime in all cases is found to be reflection symmetric with respect to the walls.

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Evolution of thick domain walls in de Sitter universe

Journal of Cosmology and Astroparticle Physics ◽

10.1088/1475-7516/2016/10/026 ◽

2016 ◽

Vol 2016 (10) ◽

pp. 026-026 ◽

Cited By ~ 5

Author(s):

A.D. Dolgov ◽

S.I. Godunov ◽

A.S. Rudenko

Keyword(s):

Domain Walls ◽

De Sitter ◽

Sitter Universe ◽

Thick Domain Walls ◽

De Sitter Universe

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GRAVITATIONAL COLLAPSE OF THICK DOMAIN WALLS: AN ANALYTIC MODEL

Modern Physics Letters A ◽

10.1142/s0217732394003440 ◽

1994 ◽

Vol 09 (39) ◽

pp. 3605-3609 ◽

Cited By ~ 22

Author(s):

ANZHONG WANG

Keyword(s):

Domain Wall ◽

Gravitational Collapse ◽

Gravitational Radiation ◽

Domain Walls ◽

Analytic Model ◽

Einstein Field Equations ◽

Field Equations ◽

Pp Wave ◽

Thick Domain Walls ◽

Spacelike Infinity

An exact solution to the Einstein field equations is found, which represents the gravitational collapse of a thick domain wall. During the collapse, the wall emits gravitational radiation, which can be measured as a gravitational pp wave at the spacelike infinity. The time-reversed solution represents an expanding universe, in which a domain wall resides. It is shown explicitly that such a wall can be inflated away.

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