2014/10/31 by Andrea Coser, Erik Tonni, Pasquale Calabrese
Computer Science · Physics and Astronomy · #Lattice (music) #Logarithm #Negativity effect #Physics of Superconductivity and Magnetism #Quantum #Quantum Information and Cryptography #Quantum discord #Quantum entanglement #Quantum many-body systems #cond-mat.stat-mech #hep-th #quant-ph
paper · pdf · doi:10.1088/1742-5468/2014/12/p12017
published as J. Stat. Mech. (2014) P12017 · 32 pages, 10 figures, v2: minor corrections, published version
openalex publication_date 2014/12/16 · arxiv created 2014/12/20 · arxiv updated 2014/12/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We study the time evolution of the logarithmic negativity after a global quantum quench. In a 1+1 dimensional conformal invariant field theory, we consider the negativity between two intervals which can be either adjacent or disjoint. We show that the negativity follows the quasi-particle interpretation for the spreading of entanglement. We check and generalise our findings with a systematic analysis of the negativity after a quantum quench in the harmonic chain, highlighting two peculiar lattice effects: the late birth and the sudden death of entanglement.