https://doi.org/10.1140/epjc/s10052-022-10019-3
Regular Article - Theoretical Physics
Massless fermions in spatially flat FLRW space-times
West University of Timişoara, V. Pârvan Ave. 4, 300223, Timişoara, Romania
Received:
5
December
2021
Accepted:
10
January
2022
Published online:
24
January
2022
The propagation of the packets of left-handed plane wave solutions of the massless Dirac equation is studied in spatially flat Friedmann–Lemaître–Robertson–Walker (FLRW) space-times. Assuming that the observations are performed in physical frames with Painlevé–Gullstrand coordinates, the current and energy–momentum tensor are derived, emphasising their severe decay and moderate dispersion during propagation. As the wave packets move along null geodesics, interesting effects are produced by the apparent or event horizons.
© The Author(s) 2022
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3
