We consider a relativistic system of fermions with time-dependent mass, in 1+1
space-time dimensions. We show that the state of this system immediately after a sudden quench, in which the mass is taken to zero, is a ...
In this work we explore the thermalization of two point functions of free scalars in $d+1$ dimensions after a quantum quench. The mass is time dependent and is taken to zero. A detailed analysis of this problem has been ...