Triviality of entanglement entropy in the Galilean vacuum

Itamar Hason

Research output: Contribution to journalArticlepeer-review


We study the entanglement entropy of the vacuum in non-relativistic local theories with Galilean or Schrödinger symmetry. We clear some confusion in the literature on the free Schrödinger case. We find that with only positive U(1) charge particles (states) and a unique zero U(1) charge state (the vacuum) the entanglement entropy must vanish in that state.

Original languageEnglish
Pages (from-to)149-151
Number of pages3
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
StatePublished - 10 May 2018


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