Strongly-Interacting Bosons in a Two-Dimensional Quasicrystal Lattice
- URL: http://arxiv.org/abs/2010.07590v2
- Date: Fri, 19 Mar 2021 13:13:28 GMT
- Title: Strongly-Interacting Bosons in a Two-Dimensional Quasicrystal Lattice
- Authors: Ronan Gautier, Hepeng Yao, Laurent Sanchez-Palencia
- Abstract summary: Quasicrystals exhibit exotic properties inherited from the self-similarity of their long-range ordered, yet aperiodic, structure.
We show that strong interactions stabilize Mott phases, some of which have spontaneously broken eightfold symmetry.
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- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Quasicrystals exhibit exotic properties inherited from the self-similarity of
their long-range ordered, yet aperiodic, structure. The recent realization of
optical quasicrystal lattices paves the way to the study of correlated Bose
fluids in such structures, but the regime of strong interactions remains
largely unexplored, both theoretically and experimentally. Here, we determine
the quantum phase diagram of two-dimensional correlated bosons in an eightfold
quasicrystal potential. Using large-scale quantum Monte Carlo calculations, we
demonstrate a superfluid-to-Bose glass transition and determine the critical
line. Moreover, we show that strong interactions stabilize Mott insulator
phases, some of which have spontaneously broken eightfold symmetry. Our results
are directly relevant to current generation experiments and, in particular,
drive prospects to the observation of the still elusive Bose glass phase in two
dimensions and exotic Mott phases.
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