Superstripes and quasicrystals in bosonic systems with hard-soft corona interactions

• URL: http://arxiv.org/abs/2009.10203v1
• Date: Mon, 21 Sep 2020 22:24:19 GMT
• Title: Superstripes and quasicrystals in bosonic systems with hard-soft corona interactions
• Authors: Bruno R. de Abreu, Fabio Cinti, and Tommaso Macr\`i
• Abstract summary: We investigate the effect of quantum fluctuations on the phases of bosonic particles with isotropic hard-soft corona interactions. A rich phase diagram, parametrized by the density of particles, reveals supersolid stripes, kagome and triangular crystals in the low-density regime. In the high-density limit we observe patterns with 12-fold rotational symmetry compatible with periodic approximants of quasicrystalline phases.
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• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The search for spontaneous pattern formation in equilibrium phases with genuine quantum properties is a leading direction of current research. In this work we investigate the effect of quantum fluctuations - zero point motion and exchange interactions - on the phases of an ensemble of bosonic particles with isotropic hard-soft corona interactions. We perform extensive path-integral Monte Carlo simulations to determine their ground state properties. A rich phase diagram, parametrized by the density of particles and the interaction strength of the soft-corona potential, reveals supersolid stripes, kagome and triangular crystals in the low-density regime. In the high-density limit we observe patterns with 12-fold rotational symmetry compatible with periodic approximants of quasicrystalline phases. We characterize these quantum phases by computing the superfluid density and the bond-orientational order parameter. Finally, we highlight the qualitative and quantitative differences of our findings with the classical equilibrium phases for the same parameter regimes.

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