  We study the effect of two simultaneous local quenches on the evolution of
Loschmidt echo and entanglement entropy of a one dimensional transverse Ising
model. In this work, one of the local quenches involves the connection of two
spin-1/2 chains at a certain time and the other local quench corresponds to a
sudden change in the magnitude of the transverse field at a given site in one
of the spin chains. We numerically calculate the dynamics associated with the
Loschmidt echo and the entanglement entropy as a result of such double
quenches, and discuss various timescales involved in this problem using the
picture of quasiparticles generated as a result of such quenches.
