Quantum quasicrystals of spin-orbit-coupled dipolar bosons.
We study quasi-two-dimensional dipolar Bose gases in which the bosons experience a Rashba spin-orbit coupling. We show that the degenerate dispersion minimum due to the spin-orbit coupling, combined with the long-range dipolar interaction, can stabilize a number of quantum crystalline and quasicrystalline ground states. Coupling the bosons to a fermionic species can further stabilize these phases. We estimate that the crystalline and quasicrystalline phases should be detectable in realistic dipolar condensates, e.g., dysprosium, and discuss their symmetries and excitations.
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
Sarang
S
Gopalakrishnan
Ivar
I
Martin
Eugene A
EA
Demler