Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Foini, Laura"'
Autor:
Bouverot-Dupuis, Oscar, Pappalardi, Silvia, Kurchan, Jorge, Polkovnikov, Anatoli, Foini, Laura
We study the behavior of two-time correlation functions at late times for finite system sizes considering observables whose (one-point) average value does not depend on energy. In the long time limit, we show that such correlation functions display a
Externí odkaz:
http://arxiv.org/abs/2407.12103
Understanding how out-of-equilibrium states thermalize under quantum unitary dynamics is an important problem in many-body physics. In this work, we propose a statistical ansatz for the matrix elements of non-equilibrium initial states in the energy
Externí odkaz:
http://arxiv.org/abs/2406.04684
Publikováno v:
Phys. Rev. B 109, 205148 (2024)
We study an XXZ spin chain at zero magnetization coupled to a collection of local harmonic baths at zero temperature. We map this system on a (1+1)D effective field theory using bosonization, where the effect of the bath is taken care of in an exact
Externí odkaz:
http://arxiv.org/abs/2312.13095
Autor:
Durin, Gianfranco, Schimmenti, Vincenzo Maria, Baiesi, Marco, Casiraghi, Arianna, Magni, Alessandro, Herrera-Diez, Liza, Ravelosona, Dafiné, Foini, Laura, Rosso, Alberto
Publikováno v:
Phys. Rev. B 110, L020405 (2024)
We study the motion of a domain wall on an ultrathin magnetic film using the magneto-optical Kerr effect (MOKE). At tiny magnetic fields, the wall creeps only via thermal activation over the pinning centers present in the sample. Our results show tha
Externí odkaz:
http://arxiv.org/abs/2309.12898
Publikováno v:
Phys. Rev. B 108, 205138 (2023)
We study an incommensurate XXZ spin chain coupled to a collection of local harmonic baths. At zero temperature, by varying the strength of the coupling to the bath the chain undergoes a quantum phase transition between a Luttinger liquid phase and a
Externí odkaz:
http://arxiv.org/abs/2307.07989
Publikováno v:
Quantum 8, 1227 (2024)
We discuss the construction of a microcanonical projection WOW of a quantum operator O induced by an energy window filter W, its spectrum, and the retrieval of canonical many-time correlations from it.
Comment: 18 pages, 4 figures. Updated versi
Comment: 18 pages, 4 figures. Updated versi
Externí odkaz:
http://arxiv.org/abs/2304.10948
Publikováno v:
Phys. Rev. B 107, 165113 (2023)
We study an XXZ spin chain, where each spin is coupled to an independent ohmic bath of harmonic oscillators at zero temperature. Using bosonization and numerical techniques, we show the existence of two phases separated by an Kosterlitz-Thouless (KT)
Externí odkaz:
http://arxiv.org/abs/2210.01590
Publikováno v:
SciPost Phys. 17, 114 (2024)
The spectral form factor of quantum chaotic systems has the familiar `ramp $+$ plateau' form. Techniques to determine its form in the semiclassical or the thermodynamic limit have been devised, in both cases based on the average over an energy range
Externí odkaz:
http://arxiv.org/abs/2207.02473
Publikováno v:
Phys. Rev. Lett. 129, 170603 (2022)
Quantum thermalization is well understood via the Eigenstate Thermalization Hypothesis (ETH). The general form of ETH, describing all the relevant correlations of matrix elements, may be derived on the basis of a `typicality' argument of invariance w
Externí odkaz:
http://arxiv.org/abs/2204.11679
Publikováno v:
SciPost Phys. 13, 111 (2022)
The study of the non-equilibrium dynamics of many-body systems after a quantum quench received a considerable boost and a deep theoretical understanding from the path integral formulation in imaginary time. However, the celebrated problem of a quench
Externí odkaz:
http://arxiv.org/abs/2203.06740