2011

A No-summoning theorem in Relativistic Quantum Theory

Kent, Adrian

Understand

Alice gives Bob an unknown localized physical state at some point P.

  • At some point Q in the causal future of P, Alice will ask Bob for the state back.
  • Bob knows this, but does not know at which point Q until the request is made.
  • Bob can satisfy Alice's summons, with arbitrarily short delay, for a quantum state in Galilean space-time or a classical state in Minkowski space-time.

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