@article{07eb2447c3cf477789b07cb22c46b360,
title = "B modes from postinflationary gravitational waves sourced by axionic instabilities at cosmic reionization",
abstract = "We show that axionlike particles that only couple to invisible dark photons can generate visible B mode signals around the reionization epoch. The axion field starts rolling shortly before reionization, resulting in a tachyonic instability for the dark photons. This generates an exponential growth of the dark photon quanta sourcing both scalar metric modes and gravitational waves that leave an imprint on the reionized baryons. The tensor modes modify the cosmic microwave background (CMB) polarization at reionization, generating visible B mode signatures for the next generation of CMB experiments for parameter ranges that satisfy the current experimental constraints.",
author = "Michael Geller and Sida Lu and Yuhsin Tsai",
note = "Publisher Copyright: {\textcopyright} 2021 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.",
year = "2021",
month = oct,
day = "15",
doi = "10.1103/PhysRevD.104.083517",
language = "אנגלית",
volume = "104",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "8",
}