Quenches on thermofield double states and time reversal symmetry

Understand

In this paper we study a quench protocol on thermofield double states in the presence of time-reversal symmetry that is inspired by the work of Gao, Jafferis and Wall.

• The deformation is a product of hermitian operators on the left and right systems that are identical to each other and that lasts for a small amount of time.
• We study the linear dependence on the quench to the properties of the deformation under time reversal.
• If the quench is time symmetric, then the linear response after the quench of all T-even operators vanishes.