Gravitational correction to fuzzy string in metastable brane configuration

Kasai, Aya; Ookouchi, Yutaka

doi:10.1007/jhep06(2015)098

Cited by 5 publications

(1 citation statement)

References 71 publications

(126 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If the landscape really exists, it is necessary to elucidate how effectively phase transitions proceed in order to uncover the cosmic history. As emphasized in [29,30], catalytic effects in string theory may play an important role in this investigation. It was discussed in ref.…”

Section: Introductionmentioning

confidence: 91%

Baryon as impurity for phase transition in string landscape

Kasai¹,

Nakai²,

Ookouchi³

2016

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

We consider a decay of a false vacuum in flux compactifications of type IIB string theory and study a catalytic effect for a phase transition induced by a new type of impurities. We concentrate on the large N dual of a D5-brane/anti-D5-brane system which has a rich vacuum structure. We show that D3-branes wrapping the 3-cycles can form a baryon bound state with a monopole. We find that these baryon-like objects can make the lifetime of the metastable vacuum shorter.

show abstract

Section: Introductionmentioning

confidence: 91%

Baryon as impurity for phase transition in string landscape

Kasai¹,

Nakai²,

Ookouchi³

2016

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

Stability Longevity and All That: False Vacua and Topological Defects

Yajnik

2017

Gravity and the Quantum

View full text Add to dashboard Cite

I present two interesting studies related to the role of solitons in theories with spontaneous symmetry breaking. Quantised fermions coupled to solitons are known to induce fractional fermion number. I present an example where an unstable topological solution binding a zero mode of a majorana fermion gets stabilised due to the induced fractional number. Thus neither is the cosmic string stable nor is the fermion number conserved, yet the bound state then becomes stable due to Quantum Mechanics. The other phenomenon concerns a metastable vacuum getting destabilised due to the presence of a cosmic string. This happens because the scalar field signalling spontaneous symmetry breaking acquires a vacuum expectation value approaching its true vacuum value in the core of the string. Thus the string acts like a seed nucleating the true vacuum. The instanton mediating between the false vacuum and the exit point into the true vacuum is shown to exist and graphically displayed through a numeric calculation. T. Padmanabhan has been a long time friend and was collaborator for early investigations in this direction. I review these works done subsequently with other collaborators as a felicitation to him on his sixtieth birthday.

show abstract

Catalytic creation of baby bubble universe with small positive cosmological constant

Koga

Ookouchi

2019

J. High Energ. Phys.

Self Cite

View full text Add to dashboard Cite

We investigate the decay of metastable de Sitter, Minkowski and anti-de Sitter vacua catalyzed by a black hole and a cloud of strings. We apply the method to the creation of the four dimensional bubble universe in the five dimensional anti-de Sitter spacetime recently proposed by Banerjee, Danielsson, Dibitetto, Giri and Schillo [1]. We study the bounce action for the creation and find that the bubble with very small cosmological constant, of order Λ (4) /M 2 4 ∼ 10 −120 , is favored by the catalysis by assuming appropriate mass scales of the black hole and the cloud of strings to reproduce the present energy densities of matter and radiation in the bubble universe.

show abstract

Gravitational correction to fuzzy string in metastable brane configuration

Cited by 5 publications

References 71 publications

Baryon as impurity for phase transition in string landscape

Baryon as impurity for phase transition in string landscape

Stability Longevity and All That: False Vacua and Topological Defects

Catalytic creation of baby bubble universe with small positive cosmological constant

Contact Info

Product

Resources

About