Quantum coherence of photons at cosmological distances

Arjun Berera, Suddhasattwa Brahma, Robert Brandenberger, Jaime Calderón-Figueroa*, Alan Heavens

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

We identify potential sources of decoherence for U(1) gauge bosons from a cosmological standpoint. Besides interactions with different species in the cosmological medium, we also consider effects due to the expansion of the Universe, which can produce particles (especially scalars) that can potentially interact with the photon in a quantum state. We look in particular at the case of axionlike particles and their predicted decay channels in our analysis. These interactions are shown to have a negligible effect as far as decoherence goes. Interaction rates with cosmic microwave background radiation or through Thomson scattering are small, so that the interstellar medium remains the biggest decoherence factor. Thus, quantum teleportation experiments with photon energies in the range 1–10 keV should be feasible at cosmological distances up to the galaxy formation epoch or beyond (z∼100).
Original languageEnglish
Article number063519
Pages (from-to)1-11
Number of pages11
JournalPhysical Review D
Issue number6
Early online date8 Sept 2021
Publication statusPublished - 15 Sept 2021

Keywords / Materials (for Non-textual outputs)

  • hep-ph
  • astro-ph.CO


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