2016/10/05 by Justin Khoury · 1 citation
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Astrophysics #Baryonic dark matter #Cold Atom Physics and Bose-Einstein Condensates #Cold dark matter #Cosmology #Dark energy #Dark matter #Dark matter halo #Galaxy #Hot dark matter #Physics #Quantum mechanics #Quantum, superfluid, helium dynamics #Superfluidity #astro-ph.CO #hep-ph #hep-th
paper · pdf · doi:10.21468/scipostphyslectnotes.42
published as SciPost Phys. Lect. Notes 42 (2022) · 21 pages, 1 figure, Submitted to SciPost Physics Lecture Notes, Les Houches Summer School Series. v2: corrected typos and added references
openalex publication_date 2016/10/05 · arxiv created 2022/01/30 · arxiv updated 2022/03/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
In these lectures I describe a theory of dark matter superfluidity developed in the last few years. The dark matter particles are axion-like, with masses of order eV. They Bose-Einstein condense into a superfluid phase in the central regions of galaxy halos. The superfluid phonon excitations in turn couple to baryons and mediate a long-range force (beyond Newtonian gravity). For a suitable choice of the superfluid equation of state, this force reproduces the various galactic scaling relations embodied in Milgrom's law. Thus the dark matter and modified gravity phenomena represent different phases of a single underlying substance, unified through the rich and well-studied physics of superfluidity.