Dynamical phase transitions in the long-range (powerlaw) interacting transverse-field Ising model
14:00 - 15:00
CFEL (Bldg. 99)
Seminar Room III, EG.080
Dynamical phase transitions (DPTs) have gained a lot of interest in the past few years in a variety of quantum many-body systems, where a system in its groundstate is quenched by abruptly changing a control parameter of the Hamiltonian, such as interaction strength or external field. Afterwards, a DPT can be detected in one of at least two forms: a type-I DPT which is detected, after relaxation in time, through the nonanalyticity of an appropriate order parameter as a function of the control parameter through which the quench is effected; and a type-II DPT which is detected as a nonanalyticity of the Loschmidt echo return rate as a function in time, without giving care as to whether or not a stationary state has been reached in the time evolution.
We study both types of DPTs in the onedimensional long-range (power-law)
interacting transverse-field Ising model using finiteand infinite-size
time-dependent density matrix renormalization group techniques, and we
discuss numerical results in relation to theory.