Seminario. Sachindeo Vaidya  (Indian Institute of Science, Bangalore), "Confinement-deconfinement transition in gauge matrix models"

Title: "Confinement-deconfinement transition in gauge matrix models"
Sachindeo Vaidya 
(Indian Institute of Science, Bangalore)

Abstract: We will discuss the matrix model of two-color one-flavor adjoint QCD in the weak coupling regime, and show that there is a quantum phase transition at g*0≃ 0.143: for g < g∗0 , the ground state wavefunction is localized in a small region of the gauge configuration space, while for g > g∗0, it gets delocalized over a much larger region. The transition between these two phases is singular, with the ground state at g∗0 being distinctly different from that of g∗0 ±|ϵ|. At g∗0, we will see that the square of the chromoelectric field vanishes, strongly suggesting that the system is in a “dual superconductor” phase. Numerical evidence shows that the localization-delocalization phenomenon holds for the 1st and 2nd excited states as well, leading us to conjecture that there are an infinite number of isolated singular points accumulating to g=0. The model formally possesses N= 1 supersymmetry for a particular choice of parameters. We show that in the localized phase the supermultiplet structure is disrupted and SUSY is thus spontaneously broken.

Fecha: jueves, 19 de febrero de 2026
Hora:   12:10 horas
Lugar: Seminario de Física Teórica