162 citations · 1.5k across the 41 of their papers we have counts for
4 papers · 1 filter
UV completion without symmetry restoration
Solomon Endlich, Alberto Nicolis, Riccardo Penco
We show that it is not possible to UV-complete certain low-energy effective theories with spontaneously broken space-time symmetries by embedding them into linear sigma models, tha…
Spontaneously broken mass
Solomon Endlich, Alberto Nicolis, Riccardo Penco
The Galilei group involves mass as a central charge. We show that the associated superselection rule is incompatible with the observed phenomenology of superfluid helium 4: this is…
Relativistic Fluids, Superfluids, Solids and Supersolids from a Coset Construction
Alberto Nicolis, Riccardo Penco, Rachel A. Rosen
We provide a systematic coset construction of the effective field theories governing the low-energy dynamics of relativistic fluids and solids, and of their "super" counterparts. T…
More on gapped Goldstones at finite density: More gapped Goldstones
Alberto Nicolis, Riccardo Penco, Federico Piazza +1
It was recently argued that certain relativistic theories at finite density can exhibit an unconventional spectrum of Goldstone excitations, with gapped Goldstones whose gap is exa…