Results 11 to 20 of about 3,407 (43)

Dynamical free energy and the Loschmidt-echo for a class of quantum quenches in the Heisenberg spin chain

open access: yes, 2013
We consider a class of global quantum quenches in the Heisenberg XXZ spin chain, where the initial states are given by products of local two-site states. The two main examples are the N\'eel state and the dimer state.
Pozsgay, B.
core   +1 more source

Detecting signals of weakly first-order phase transitions in two-dimensional Potts models [PDF]

open access: yes, 2019
We investigate the first-order phase transitions of the $q$-state Potts models with $q = 5, 6, 7$, and $8$ on the two-dimensional square lattice, using Monte Carlo simulations.
Iino, Shumpei   +3 more
core   +1 more source

Properties of thermal quantum states: locality of temperature, decay of correlations, and more

open access: yes, 2019
We review several properties of thermal states of spin Hamiltonians with short range interactions. In particular, we focus on those aspects in which the application of tools coming from quantum information theory has been specially successful in the ...
Kliesch, Martin, Riera, Arnau
core   +1 more source

On non-equilibrium physics and string theory

open access: yes, 2013
In this article we review the relation between string theory and non-equilibrium physics based on our previously published work. First we explain why a theory of quantum gravity and non-equilibrium statistical physics should be related in the first place.
Gray, Nickolas   +2 more
core   +1 more source

Computation Speed of the F.A.S.T. Model [PDF]

open access: yes, 2009
The F.A.S.T. model for microscopic simulation of pedestrians was formulated with the idea of parallelizability and small computation times in general in mind, but so far it was never demonstrated, if it can in fact be implemented efficiently for ...
Kretz, Tobias
core  

The Origins of Computational Mechanics: A Brief Intellectual History and Several Clarifications [PDF]

open access: yes, 2017
The principle goal of computational mechanics is to define pattern and structure so that the organization of complex systems can be detected and quantified.
Crutchfield, James P.
core   +1 more source

Overlaps between eigenstates of the XXZ spin-1/2 chain and a class of simple product states

open access: yes, 2014
We consider a class of quantum quenches in the spin-1/2 XXZ chain, where the initial state is of a simple product form. Specific examples are the N\'eel state, the dimer state and the q-deformed dimer state.
Pozsgay, B.
core   +1 more source

Temperature dependence of butterfly effect in a classical many-body system

open access: yes, 2018
We study the chaotic dynamics in a classical many-body system of interacting spins on the kagome lattice. We characterise many-body chaos via the butterfly effect as captured by an appropriate out-of-time-ordered correlator.
Bhattacharjee, Subhro   +2 more
core   +1 more source

On "Ergodicity and Central Limit Theorem in Systems with Long-Range Interactions" by Figueiredo et al

open access: yes, 2009
In the present paper we refute the criticism advanced in a recent preprint by Figueiredo et al [1] about the possible application of the $q$-generalized Central Limit Theorem (CLT) to a paradigmatic long-range-interacting many-body classical Hamiltonian ...
A. Pluchino   +12 more
core   +1 more source

Critical domain walls in the Ashkin-Teller model

open access: yes, 2011
We study the fractal properties of interfaces in the 2d Ashkin-Teller model. The fractal dimension of the symmetric interfaces is calculated along the critical line of the model in the interval between the Ising and the four-states Potts models.
Adams D A   +20 more
core   +1 more source

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