Violation of the strong Huygen's principle and timelike signals from the early Universe

Abstract

We analyze the implications of the violations of the strong Huygens principle in the transmission of information from the early universe to the current era via massless fields. We show that much more information reaches us through timelike channels (not mediated by real photons) than it is carried by rays of light, which are usually regarded as the only carriers of information.

5 pages, 2 figures. RevTeX 4.1. V2: Updated to match published version. Previous title "A glimpse of the early universe without real light" modified to match Physical Review Letters published version

References in corpus (4)

• Entangling Power of an Expanding Universe
• Wavepacket detection with the Unruh-DeWitt model
• Entanglement in curved spacetimes and cosmology
• Information transmission without energy exchange

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