Now showing items 52-68 of 68

    • Self-averaging behavior at the metal-insulator transition of many-body quantum systems out of equilibrium . 

      Torres-Herrera, E. Jonathan; Schiulaz, Mauro; Pérez-Bernal, Francisco; Santos, Lea F. (2019-10)
      An observable of a disordered system is self-averaging when its properties do not depend on the specific realization considered. Lack of self-averaging, on the other hand, implies that sample to sample fluctuations persist ...
    • Self-averaging in many-body quantum systems out of equilibrium. 

      Schiulaz, Mauro; Torres-Herrera, E. Jonathan; Pérez-Bernal, Francisco; Santos, Lea F. (arXiv.org, 2019-06-27)
      Despite its importance to experiments, numerical simulations, and the development of theoretical models, self-averaging in many-body quantum systems out of equilibrium remains underinvestigated. Usually, in the chaotic ...
    • Self-averaging in many-body quantum systems out of equilibrium: Approach to the localized phase. 

      Santos, Lea F.; Torres-Herrera, E. Jonathan; De Tomasi, Giuseppe; Schiulaz, Mauro; Pérez-Bernal, Francisco (American Physical Society, 2020-09-23)
      The self-averaging behavior of interacting many-body quantum systems has been mostly studied at equilibrium. The present paper addresses what happens out of equilibrium, as the increase of the strength of on-site disorder ...
    • Self-averaging in many-body quantum systems out of equilibrium: Chaotic systems. 

      Santos, Lea F.; Schiulaz, Mauro; Torres-Herrera, E. Jonathan; Pérez-Bernal, Francisco (American Physical Society, 2020-05-26)
      Despite its importance to experiments, numerical simulations, and the development of theoretical models,self-averaging in many-body quantum systems out of equilibrium remains under investigated. Usually, in the chaotic ...
    • Self-averaging in many-body quantum systems out of equilibrium: Time dependence of distributions. 

      Santos, Lea F.; Torres-Herrera, E. Jonathan; Vallejo-Fabila, Isaías; Martínez-Mendoza, Andrei J. (American Chemical Society, 2020-05-28)
      In a disordered system, a quantity is self-averaging when the ratio between its variance over disorder realizations and the square of its mean decreases as the system size increases. Here, we consider a chaotic disordered ...
    • Sensitivity of quantum information to environment perturbations measured with a nonlocal out-of-time-order correlation function. 

      Santos, Lea F.; Niknam, Mohamad; Cory, David G. (American Physical Society, 2020-02-24)
      In a quantum system coupled with a non-Markovian environment, quantum information may flow out of or into the system. Measuring quantum information flow and its sensitivity to perturbations is important for a better ...
    • Sensitivity of quantum information to environment perturbations measured with the out-of-time-order correlation function. 

      Niknam, Mohamad; Santos, Lea F.; Cory, David G. (arXiv.org, 2018-08-13)
      Measures to quantify the flow of quantum information and its sensitivity to environment perturbations are needed to better understand the evolution of open quantum systems and to distinguish non-Markovian from Markovian ...
    • Signatures of chaos and thermalization in the dynamics of many-body quantum systems. 

      Torres-Herrera, E.J.; Santos, Lea F. (arXiv.org, 2018-04-17)
      We extend the results of two of our papers [Phys. Rev. A 94, 041603R (2016) and Phys. Rev. B 97, 060303R (2018)] that touch upon the intimately connected topics of quantum chaos and thermalization. In the first, we argued ...
    • Signatures of chaos and thermalization in the dynamics of many-body quantum systems. 

      Santos, Lea F.; Torres-Herrera, Eduardo Jonathan (Springer Berlin Heidelberg, 2019-03)
      We extend the results of two of our papers [Phys. Rev. A 94, 041603R (2016) and Phys. Rev. B 97, 060303R (2018)] that touch upon the intimately connected topics of quantum chaos and thermalization. In the first, we argued ...
    • Social categories as markers of intrinsic interpersonal obligations. 

      Chalik, Lisa; Rhodes, Marjorie (SAGE Publications, 2013-06)
      Social categorization is an early-developing feature of human social cognition, yet the role that social categories play in how children understand and predict human behavior has been unclear. These studies test whether ...
    • Speck of chaos. 

      Santos, Lea F.; Pérez-Bernal, F.; Torres-Herrera, E.J. (American Physical Society, 2020)
      It has been shown that, despite being local, a perturbation applied to a single site of the one-dimensional XXZ model is enough to bring this interacting integrable spin-1/2 system to the chaotic regime. Here, we show ...
    • Thermalization time in many-body quantum systems. 

      Santos, Lea F.; Torres-Herrera, E. Jonathan; Pérez-Bernal, Francisco; Lezama, Talía L.M.; Bar Lev, Yevgeny (arXiv preprint, 2021-02-23)
      Isolated chaotic many-body quantum systems can reach thermal equilibrium, but it is not yet clear how long they take to do so. To answer this question, we use exact numerical methods and analyze the entire evolution, ...
    • Thouless and Relaxation Time Scales in Many-Body Quantum Systems. 

      Schiulaz, Mauro; Torres-Herrera, E.J.; Santos, Lea F. (arXiv.org, 2018-07-19)
      Studies of the dynamics of isolated interacting many-body quantum systems are at the forefront of experimental and theoretical physics. A major open question is the identification of the time scales involved in the ...
    • Thouless and relaxation time scales in many-body quantum systems. 

      Santos, Lea F.; Schiulaz, Mauro; Torres-Herrera, E. Jonathan (American Physical Society, 2019-05-28)
      Abstract A major open question in studies of nonequilibrium quantum dynamics is the identification of the time scales involved in the relaxation process of isolated quantum systems that have many interacting particles. ...
    • Timescales in the quench dynamics of many-body quantum systems: Participation ratio versus out-of-time ordered correlator. 

      Santos, Lea F.; Borgonovi, F.; Izrailev, F.M. (American Physical Society, 2019-05-31)
      We study quench dynamics in the many-body Hilbert space using two isolated systems with a finite number of interacting particles: a paradigmatic model of randomly interacting bosons and a dynamical (clean) model of ...
    • Ubiquitous quantum scarring does not prevent ergodicity. 

      Santos, Lea F.; Pilatowsky-Cameo, Saúl; Villaseñor, David; Bastarrachea-Magnani, Miguel A.; Lerma-Hernández, Sergio; Hirsch, Jorge G. (SpringerNature, 2021-02-08)
      In a classically chaotic system that is ergodic, any trajectory will be arbitrarily close to any point of the available phase space after a long time, filling it uniformly. Using Born’s rules to connect quantum states with ...
    • Universal fractional map and cascade of bifurcations type attractors 

      Edelman, Mark (Chaos: An Interdisciplinary Journal of Nonlinear Science, 2013-09)
      We modified the way in which the Universal Map is obtained in the regular dynamics to derive the Universal α-Family of Maps depending on a single parameter α>0, which is the order of the fractional derivative in the nonlinear ...