Operator content of entanglement spectra in the transverse field Ising chain after global quenches

Surace, Jacopo and Tagliacozzo, Luca and Tonni, Erik (2020) Operator content of entanglement spectra in the transverse field Ising chain after global quenches. Physical Review B - Condensed Matter and Materials Physics, 101 (24). 241107(R). ISSN 0163-1829

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    Abstract

    We consider the time evolution of the gaps of the entanglement spectrum for a block of consecutive sites in finite transverse field Ising chains after sudden quenches of the magnetic field. We provide numerical evidence that, whenever we quench at or across the quantum critical point, the time evolution of the ratios of these gaps allows us to obtain universal information. They encode the low-lying gaps of the conformal spectrum of the Ising boundary conformal field theory describing the spatial bipartition within the imaginary time path integral approach to global quenches at the quantum critical point.

    ORCID iDs

    Surace, Jacopo, Tagliacozzo, Luca ORCID logoORCID: https://orcid.org/0000-0002-5858-1587 and Tonni, Erik;