427 citations · 3.4k across the 56 of their papers we have counts for
58 papers
Features of Spacetime-Symmetry Breaking and the Standard-Model Extension in Riemann-Cartan Geometry
Robert Bluhm
For over two decades, the gravity sector of the Standard-Model Extension (SME) has served as a phenomenological framework for testing spacetime symmetry breaking in the presence of…
Spontaneous and Explicit Spacetime Symmetry Breaking in Einstein-Cartan Theory with Background Fields
Robert Bluhm, Yu Zhi
Explicit and spontaneous breaking of spacetime symmetry under diffeomorphisms, local translations, and local Lorentz transformations due to the presence of fixed background fields…
Explicit Diffeomorphism Breaking, No-go Conditions, and the Gravity Sector of the SME
Robert Bluhm
A brief recap is given of issues that can occur when fixed nondynamical backgrounds that explicitly break diffeomorphism invariance are included in gravity theories. Implications f…
Gravity with Explicit Diffeomorphism Breaking
Robert Bluhm, Yumu Yang
Modified theories of gravity that explicitly break diffeomorphism invariance have been used for over a decade to explore open issues related to quantum gravity, dark energy, and da…
The SME with gravity and explicit diffeomorphism breaking
Robert Bluhm
This overview looks at what happens when the Standard-Model Extension (SME) is used to investigate gravity theories with explicit diffeomorphism breaking. It is shown that when mat…
Gravity with explicit spacetime symmetry breaking and the Standard-Model Extension
Robert Bluhm, Hannah Bossi, Yuewei Wen
The Standard-Model Extension (SME) is the general phenomenological framework used to investigate Lorentz violation at the level of effective field theory. It has been used to obtai…