3 papers
hep-th2024
On Stabilization of Magnetically Charged Brane Shell and Over-extremality
Sohei Tsukahara
In string theory, we can geometrically realize a metastable state by wrapping D5-branes and anti D5-branes to a singular manifold. We consider wrapping D3-branes to the internal sp…
hep-th2024
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…
hep-th2023
Life-time of Metastable Vacuum in String Theory and Trans-Planckian Censorship Conjecture
Sohei Tsukahara
It has been known that the catalytic effect makes the life-time of a metastable state shorter. We discuss this phenomenon in a decay process of a metastable vacuum in the brane-lim…