2015/12/31 by Pawel Caputa, Paweł Caputa, Masahiro Nozaki +1 · 57 citations
Chemistry · Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Chemistry #Cosmology and Gravitation Theories #Entropy (arrow of time) #Excited state #Mathematics #Operator (biology) #Physics #Principle of maximum entropy #Quantum #Quantum entanglement #Quantum many-body systems #Quantum mechanics #Quasiparticle #Rényi entropy #Statistical physics #Theoretical physics #cond-mat.str-el #hep-th #quant-ph
paper · pdf · doi:10.1103/physrevd.93.105032
published in Physical review. D/Physical review. D. 93(10) (American Physical Society) · 34 pages plus appendices, 10 figures, 18 tables; minor change
arxiv created 2016/02/08 · openalex publication_date 2016/05/20 · arxiv updated 2016/05/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
In this work we consider the time evolution of charged R'enyi entanglement entropies after exciting the vacuum with local fermionic operators. In order to explore the information contained in charged R'enyi entropies, we perform computations of their excess due to the operator excitation in two-dimensional conformal field theory, free fermionic field theories in various dimensions as well as holography. In the analysis we focus on the dependence on the entanglement charge, the chemical potential and the spacetime dimension. We find that excesses of charged (R'enyi) entanglement entropy can be interpreted in terms of charged quasiparticles. Moreover, we show that by appropriately tuning the chemical potential, charged R'enyi entropies can be used to extract entanglement in a certain charge sector of the excited state.