Essays about: "many-body localization"

Found 4 essays containing the words many-body localization.

  1. 1. Local Integrals of Motion from Neural Networks

    University essay from KTH/Fysik

    Author : Hannes Karlsson; [2023]
    Keywords : many-body localization; integrals of motion; neural networks; machine learning; flerkroppslokalisering; rörelseintegraler; neurala nätverk; maskininlärning;

    Abstract : Neural network quantum states (NNQS) is a novel machine learning method, based on restricted Boltzmann machines, previously used to represent the wave function in many-body quantum mechanics. In this thesis, we use NNQS to instead find integrals of motion, i.e., operators, commuting with the Hamiltonian, describing a system. READ MORE

  3. 2. Information Flow and Local Observables in Many Body Localized Systems

    University essay from KTH/Fysik

    Author : Daniel Niemi; [2022]
    Keywords : Theoretical physics; many body localization; localization; aubry-andré; aubry-andrei; condensed matter; quantum matter; Teroretisk fysik; mångpartikellokalisering; lokalisering; aubry-andré; aubry-andrei; kondenserad materia; kvantmateria;

    Abstract : Disordered quantum many-body systems exhibiting the many-body localization (MBL) phenomenon evade the fate of thermalization due to the existence of an extensively large set of quasi-local integrals of motion (l-bits). Due to the size of the Hilbert space of many-body systems, it is hard to compute the time evolution of many-body systems generally, which hinders our understanding of the MBL phenomenon. READ MORE

  4. 3. Investigating the GW self-energy of the homogeneous electron gas in real space

    University essay from Lunds universitet/Matematisk fysik; Lunds universitet/Fysiska institutionen

    Author : Zhen Zhao; [2018]
    Keywords : GW method; self energy; screened-exchange; Coulomb-hole; Physics and Astronomy;

    Abstract : The real space behavior of the GW self-energy in the electron gas model was investigated in this thesis work. The self-energy is naturally decomposed into the screened-exchange and the Coulomb-hole components. READ MORE

  5. 4. Detecting the Many-Body Localization Transition with Machine Learning Techniques

    University essay from KTH/Fysik

    Author : Mattias Jönsson; [2018]
    Keywords : ;

    Abstract : .... READ MORE