Controlling dynamical fluctuations in open quantum systems is essential both for our comprehension of quantum nonequilibrium behaviour and for its possible application in near-term quantum technologies. However, understanding these fluctuations is extremely challenging due, to a large extent, to a lack of efficient numerical methods. In this talk, we shall introduce a unified framework –based on population-dynamics methods– for the evaluation of the full probability distribution of generic time-integrated observables in Markovian quantum jump processes. These include quantities carrying information about genuine quantum features, such as quantum superposition or entanglement. The algorithm we propose provides dynamical free-energy and entropy functionals which, akin to their equilibrium counterpart, permit to unveil intriguing phase-transition behaviour in quantum trajectories. We shall discuss some applications and further disclose coexistence and hysteresis, between a highly entangled phase and a low entangled one, in large fluctuations of a strongly interacting few-body system.
Ponente: Carlos Pérez-Espigares. Universidad de Granada.
Fecha y hora: Miércoles, 26 de febrero a las 10:00 horas.
Lugar: Laboratorio de Física Computacional. Planta baja del edificio de Física (junto a las pantallas). Facultad de Ciencias. Granada.
