Authors: Mzaouali, Zakaria; Puebla, Ricardo; Goold, John; El Baz, Morad; Campbell, Steve Journal: PHYSICAL REVIEW E Publication date: 2021/03/25 DOI: 10.1103/PhysRevE.103.032145 Abstract: We examine how the presence of an excited-state quantum phase transition manifests in the dynamics of a many-body system subject to a sudden quench. Focusing on the Lipkin-Meshkov-Glick model initialized in the ground [...]
Authors: Assaubay, Al-Tarazi; Castro, Alejandro J.; Valido, Antonio A. Contribution: Review Journal: PHYSICA D-NONLINEAR PHENOMENA Publication date: 2020/10/01 DOI: 10.1016/j.physd.2020.132587 Abstract: We address the modulation instability of the Hirota equation in the presence of stochastic spatial incoherence and linear time-dependent amplification/attenuation processes via the Wigner function approach. We show that the modulation instability remains baseband type, [...]
Authors: Nation, Charlie; Porras, Diego Contribution: Article Journal: PHYSICAL REVIEW E Publication date: 2020/10/12 DOI: 10.1103/PhysRevE.102.042115 Abstract: We investigate theoretically the emergence of classical statistical physics in a finite quantum system that is either totally isolated or otherwise subjected to a quantum measurement process. We show via a random matrix theory approach to nonintegrable quantum systems [...]
Authors: Nation, Charlie; Porras, Diego Contribution: Article Journal: PHYSICAL REVIEW E Publication date: 2019/05/30 DOI: 10.1103/PhysRevE.99.052139 Abstract: We analytically describe the decay to equilibrium of generic observables of a nonintegrable system after a perturbation in the form of a random matrix. We further obtain an analytic form for the time-averaged fluctuations of an observable in terms [...]