The Equation of State of Dark Matter Superfluids

Understand

We derive the finite-temperature equation of state of dark matter superfluids with 2-body and 3-body contact interactions.

• The latter case is relevant to a recently proposed model of dark matter superfluidity that unifies the collisionless aspects of dark matter with the empirical success of MOdified Newtonian Dynamics at fitting galactic rotation curves.
• The calculation uses a self-consistent mean-field approximation.
• It relies on the Hartree-Fock-Bogoliubov approximation and follows the Yukalov-Yukalova proposal to circumvent the well-known Hohenberg-Martin dilemma.