Transmission of information in nonlocal field theories

Alessio Belenchia*, Stefano Liberati, Dionigi M T Benincasa, Eduardo Martin-Martinez

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


The signaling between two observers in
dimensional flat spacetime coupled locally to a nonlocal field is considered. We show that in the case where two observers are purely timelike related—so that an exchange of on-shell massless quanta cannot occur—signaling is still possible because of a violation of Huygens’ principle. In particular, we show that the signaling is exponentially suppressed by the nonlocality scale. Furthermore, we consider the case in which the two observers are lightlike related and show that the nonlocal modification to the local result is polynomially suppressed in the nonlocality scale. This may have implications for phenomenological tests of nonlocal theories.
Original languageEnglish
JournalPhysical Review A (Atomic, Molecular, and Optical Physics)
Publication statusPublished - 07 Dec 2017


  • Relativistic quantum information
  • non locality
  • quantum detectors


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