KEK Theory Seminar/Mr.Varun Sethi

Start2018/02/06(Tue)11:00 AM
End2018/02/06(Tue)12:00 PM
VenueKenkyu-Honkan 3F, Seminar Room
Title Finite Temperature Corrections to Tachyon Mass in Intersecting D- branes and Stacks of D-branes
SpeakerMr. Varun Sethi (University of Delhi)
ContactTakao Suyama/


In arXiv:1104.2843, a microscopic top-down model of a holographic
superconductor is constructed using two intersecting D8-branes in the
bulk in D4-brane background. This is a non-BPS configuration which has
tachyons in its spectrum signaling instability of the system. This
instability has been proposed to be the bulk analogue of the BCS
instability in the boundary theory in 1104.2843. Our aim is to study a
similar simplified system at finite temperature and evaluate the
transition temperature. We thus consider a system of two intersecting D3
-branes in flat background, we compute one-loop finite temperature
correction to tachyon two-point amplitude and find, numerically, the
transition temperature at which effective mass-squared of the tachyon
becomes zero. We further extend the calculation of tachyon two-point
amplitude to the case of intersecting stacks of D3-branes.