9 papers
Robust Spin Universality Across a Ballistic-to-Diffusive Transport Crossover
Cătălin Paşcu Moca, Ovidiu I. Pâţu, Balázs Dóra
Whether a full counting statistical distribution preserves its universality class across a coherent-to-incoherent crossover is a fundamental question in open quantum systems. We re…
Dynamical correlations in a dissipative XXZ spin chain
Cătălin Paşcu Moca, Doru Sticlet, Ovidiu I. Pâţu +1
We study dynamical spin correlations in a dissipative XXZ spin chain subject to uniform local spin-loss and pumping. Starting from a mixed steady state that is featureless albeit p…
Interaction-induced asymmetry in infinite-temperature dynamical correlations of hard-core anyons
Doru Sticlet, Ovidiu I. Pâţu, Balázs Dóra +1
We study dynamical correlations of interacting hard-core anyons on a one-dimensional lattice at infinite temperature. This is a setting in which the many-body spectrum is independe…
Two-parameter Family-Vicsek scaling in a dissipative XXZ spin chain
Cătălin Paşcu Moca, Doru Sticlet, Tamás Vicsek +1
Family-Vicsek (FV) scaling provides an understanding for the growth and finite-size saturation of fluctuations in classical systems. Here, we extend the FV roughness to transferred…
Interaction enhanced altermagnet in the Hatsugai-Kohmoto model
Ádám Bácsi, Balázs Dóra
We investigate the interplay between altermagnetic band structures and electronic correlations by focusing on the altermagnetic generalization of the Hatsugai-Kohmoto…
Non-stabilizerness as a Diagnostic of Criticality and Exceptional Points in Non-Hermitian Spin Chains
Cătălin Paşcu Moca, Doru Sticlet, Balázs Dóra
We investigate non-stabilizerness, also known as ``magic,'' to understand criticality and exceptional points in non-Hermitian quantum many-body systems. Our focus is on parity-time…
Anomalous Quantum Relaxation in the Infinite Temperature Hubbard Chain
Catalin Pascu Moca, Balázs Dóra
The self-energy encodes the fundamental lifetime of quasiparticle excitations. In one dimension, it is known to display anomalous behavior at zero temperature for interacting fermi…
Hot but Coherent: Doublons at Infinite Temperature in the Hubbard chain
Cătălin Paşcu Moca, Balázs Dóra, Gergely Zaránd
We investigate the spectral properties and the dynamics of doublons in the one-dimensional Hubbard model at infinite temperature. Using a Chebyshev expansion approach formulated in…
Quantum Coherence in a Maximally Hot Hubbard Chain
Cătălin Paşcu Moca, Ovidiu I. Patu, Balázs Dóra +1
We present a detailed study of the real-time dynamics and spectral properties of the one-dimensional fermionic Hubbard model at infinite temperature. Using tensor network simulatio…