Relatore
Descrizione
Glitches, spin-up events in neutron stars, are of prime interest as they reveal properties of nuclear
matter at subnuclear densities. We numerically investigate the glitch mechanism using analogies
between neutron stars and magnetic dipolar gases in the supersolid phase. In rotating neutron stars,
glitches are believed to occur when many superfluid vortices unpin from the interior, transferring
angular momentum to the stellar surface. In the supersolid analogy, we show that a glitch happens
when vortices pinned in the low-density inter-droplet region abruptly unpin. These supersolid
glitches show remarkable parallels with neutron star glitches: they are characterized by a rapid
spin-up followed by a long post-glitch spin-down due to relaxation towards a steady state. Dipolar
supersolids offer an unprecedented possibility to test both the vortex and crystal dynamics during a
glitch. Here, we explore the glitch dependence on the supersolid quality, finding strong suppression
at the supersolid-to-solid transition. This provides a tool to study glitches originating from different
radial depths of a neutron star. Benchmarking our theory against neutron star observations, our
work will open a new avenue for the quantum simulation of stellar objects from Earth.
