Three problems of superfluid dark matter and their solution
Tobias Mistele
Abstract
In superfluid dark matter (SFDM), the phonon field plays a double role: It carries the superfluid's energy density and it mediates the MOND-like phonon force. We show that these two roles are in tension with each other on galactic scales: A MOND-like phonon force is in tension with a superfluid in equilibrium and with a significant superfluid energy density. To avoid these tensions, we propose a model where the two roles are split between two different fields. This also allows us to solve a stability problem in a more elegant way than standard SFDM. We argue that the standard estimates for the size of a galaxy's superfluid core need to be revisited.
Topics & Concepts
PhysicsSuperfluidityDark matterSuperfluid filmQuantum vortexDark energyTension (geology)PhononSuperfluid helium-4Field (mathematics)Core (optical fiber)Stability (learning theory)Effective field theoryQuantum electrodynamicsRotonDark fluidEnergy (signal processing)Theoretical physicsClassical mechanicsQuantum mechanicsCondensed matter physicsSurface tensionScalar field dark matterStandard Model (mathematical formulation)Work (physics)Dark Matter and Cosmic PhenomenaPulsars and Gravitational Waves ResearchScientific Research and Discoveries