Lorentz invariance in Framids as a potential technical analog of the CCP

Abstract: The Framid is a hypothetical system whose ground state spontaneously breaks boost symmetry, however its stress-energy tensor retains a Lorentz-invariant expectation value on the ground state, as we verify explicitly to one-loop order. The mechanism enforcing this result is rather obscure; in fact, we think this puzzle is an interesting technical analog of the cosmological constant problem. I will describe our computations that verify the Lorentz invariance of the expectation value in question, and how these yield the expected result only thanks to highly nontrivial cancellations, which are quite mysterious from the low-energy effective theory viewpoint.

cosmology and nongalactic astrophysicsother condensed matterquantum gasesstrongly correlated electronssuperconductivitygeneral relativity and quantum cosmologyHEP - theory

Audience: researchers in the topic

Carnegie Mellon theoretical physics