Speaker
Description
Entanglement is a key quantity in quantum mechanics and it has recently been central in the development of efficient tensor-network-based numerical methods, as density matrix renormalization group. They are crucial in investigating strongly interacting systems that cannot be tackled by analytical or Monte Carlo methods. However, keeping the entropy related to entanglement under control is a major imperative in order to maintain the efficiency of the method. During the out-of-equilibrium dynamics after the switch of a coupling constant of the system (i.e., a global quench), this is not possible. In this talk, we compute the linear growth of entanglement entropy during relaxation after a global quantum quench in (1+1)D integrable field theories, where exact methods are available.