179 citations · 956 across the 43 of their papers we have counts for
45 papers
The Origin and Fate of Rapid Negative Modes in Coleman--De Luccia Tunneling
Yutaka Ookouchi
Coleman--De Luccia tunneling can exhibit an infinite tower of rapidly oscillating negative modes, complicating the semiclassical evaluation of the path integral. We show that this…
Higher-Form Description of Chiral Soliton Lattice
Yutaka Ookouchi
The chiral soliton lattice (CSL) is conventionally described as a periodic winding configuration of a compact scalar field. In this paper, we formulate the CSL in a higher-form fra…
Decay of Kaluza-Klein Vacuum via Singular Instanton
Yutaka Ookouchi, Ryota Sato, Sohei Tsukahara
In the decay process of metastable vacua in quantum field theories, the bounce solution, a classical solution in Euclideanized theories, is helpful in calculating the decay rate. R…
Catalytic Creation of Bubble Universe Induced by Quintessence in Five Dimensions
Issei Koga, Yutaka Ookouchi
We investigate the bubble nucleation in five dimensional spacetime catalyzed by quintessence. We especially focus on decay of a metastable Minkowski vacuum to an anti-de Sitter vac…
Instability of Higgs Vacuum via String Cloud
Issei Koga, Sachiko Kuroyanagi, Yutaka Ookouchi
We study the instability of the Higgs vacuum caused by a cloud of strings. By catalysis, the decay rate of the vacuum is highly enhanced and, when the energy density of the cloud i…
Catalytic Creation of Baby Bubble Universe with Small Positive Cosmological Constant
Issei Koga, Yutaka Ookouchi
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 fo…