学術雑誌論文

学術雑誌論文

text

Physics Letters, Section B. 2021, 813, p. 135975

Dynamically emergent gravity from hidden local Lorentz symmetry

Elsevier B.V.

英語

text

2021-02-10

https://doi.org/10.1016/j.physletb.2020.135975

Shinya Matsuzaki, Shota Miyawaki, Kin-ya Oda, Masatoshi Yamada. Dynamically emergent gravity from hidden local Lorentz symmetry. Physics Letters B, Volume 813, 2021, 135975. https://doi.org/10.1016/j.physletb.2020.135975.

Gravity can be regarded as a consequence of local Lorentz (LL) symmetry, which is essential in defining a spinor field in curved spacetime. The gravitational action may admit a zero-field limit of the metric and vierbein at a certain ultraviolet cutoff scale such that the action becomes a linear realization of the LL symmetry. Consequently, only three types of term are allowed in the four-dimensional gravitational action at the cutoff scale: a cosmological constant, a linear term of the LL field strength, and spinor kinetic terms, whose coefficients are in general arbitrary functions of LL and diffeomorphism invariants. In particular, all the kinetic terms are prohibited except for spinor fields, and hence the other fields are auxiliary. Their kinetic terms, including those of the LL gauge field and the vierbein, are induced by spinor loops simultaneously with the LL gauge field mass. The LL symmetry is necessarily broken spontaneously and hence is nothing but a hidden local symmetry, from which gravity is emergent.

© 2020 The Author(s). Published by Elsevier B.V. This article is licensed under a Creative Commons Attribution 4.0 International License.

78730

Dynamically emergent gravity from hidden local Lorentz symmetry

Elsevier B.V.

英語

2021-02-10

Physics Letters, Section B

813

135975

https://doi.org/10.1016/j.physletb.2020.135975

https://hdl.handle.net/11094/78730