On the continuum limit of the entanglement Hamiltonian

Viktor Eisler, Erik Tonni, Ingo Peschel

Research output: Contribution to journalArticlepeer-review


We consider the entanglement Hamiltonian for an interval in a chain of free fermions in its ground state and show that the lattice expression goes over into the conformal one if one includes the hopping to distant neighbours in the continuum limit. For an infinite chain, this can be done analytically for arbitrary fillings and is shown to be the consequence of the particular structure of the entanglement Hamiltonian, while for finite rings or temperatures the result is based on numerical calculations.
Original languageEnglish
Article number073101
JournalJournal of Statistical Mechanics: Theory and Experiment
Publication statusPublished - 1 Jul 2019


  • cond-mat.stat-mech
  • hep-th


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