On free fall of fermions and antifermions
- URL: http://arxiv.org/abs/2210.07103v2
- Date: Sat, 1 Jul 2023 08:38:28 GMT
- Title: On free fall of fermions and antifermions
- Authors: Viacheslav A. Emelyanov
- Abstract summary: We propose a model describing spin-half quantum particles in curved spacetime.
We find that spin precesses in a normal Fermi frame, even in the absence of torsion.
We also find that (elementary) fermions and antifermions are indistinguishable in gravity.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We propose a model describing spin-half quantum particles in curved spacetime
in the framework of quantum field theory. Our model is based on embodying
Einstein's equivalence principle and general covariance in the definition of
quantum-particle states. With this model at hand, we compute several
observables which characterise spin-half quantum particles in a gravitational
field. In particular, we find that spin precesses in a normal Fermi frame, even
in the absence of torsion. The effect appears to be complementary to free-fall
non-universality we have recently reported about for spinless quantum
particles. Furthermore, we find that quantum-particle gravitational-potential
energy is insensitive to wave-packet spreading in the Earth's gravitational
field, that is responsible for the non-universality of free fall in quantum
theory. This theoretical result provides another channel for the experimental
study of our quantum-particle model by using gravitational spectrometers.
Finally, we also find that (elementary) fermions and antifermions are
indistinguishable in gravity.
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