Authors: Hita-Perez, Maria; Munoz, Laura; Molina, Rafael A. Journal: JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL Publication date: 2023/12/15 DOI: 10.1088/1751-8121/ad0d1e Abstract: We derive an expression for the nearest-neighbor spacing distribution P(s) of the energy levels of quantum systems with intermediate dynamics between regularity and chaos and missing levels due to random experimental errors. The expression [...]
Authors: Cortes-Vega, J.; Barra, J. F.; Pereira, L.; Delgado, A. Journal: QUANTUM INFORMATION PROCESSING Publication date: 2023/05/09 DOI: 10.1007/s11128-023-03953-y Abstract: Entangled states play a fundamental role in quantum mechanics and are at the core of many contemporary applications, such as quantum communication and quantum computing. Therefore, determining whether a state is entangled or not is [...]
Authors: Arrayas, Manuel; Tiemblo, Alfredo; Trueba, Jose L. Journal: CHAOS SOLITONS & FRACTALS Publication date: 2023/01/01 DOI: 10.1016/j.chaos.2022.113002 Abstract: [Arrayas, Manuel; Trueba, Jose L.] Univ Rey Juan Carlos, Area Electromagnetismo, Tulipan S-N, Madrid 28933, Spain; [Tiemblo, Alfredo] CSIC, Inst Fis Fundamental, Serrano 113, Madrid 28006, Spain
Authors: Mousavi, S., V; Miret-Artes, S. Journal: JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL Publication date: 2022/11/25 DOI: 10.1088/1751-8121/aca36e Abstract: Decoherence is a well established process for the emergence of classical mechanics in open quantum systems. However, it can have two different origins or mechanisms depending on the dynamics one is considering, speaking then about intrinsic [...]
Authors: Nation, Charlie; Porras, Diego Journal: JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL Publication date: 2022/11/25 DOI: 10.1088/1751-8121/aca3dc Abstract: In this work we study a scenario where unitary quantum dynamics in a many-body interacting system is restricted to a single excitation subspace. We ask how dynamics within to such a subspace may in general differ from [...]
Authors: Mousavi, S., V; Miret-Artes, S. Journal: JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL Publication date: 2022/11/25 DOI: 10.1088/1751-8121/aca36e Abstract: Decoherence is a well established process for the emergence of classical mechanics in open quantum systems. However, it can have two different origins or mechanisms depending on the dynamics one is considering, speaking then about intrinsic [...]
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 [...]
