Mesoscopic dipolar quantum crystals

Abstract

The ground state of a two-dimensional, harmonically confined mesoscopic assembly of up to thirty polar molecules is studied by computer simulations. As the strength of the confining trap is increased, clusters evolve from superfluid, to supersolid, to insulating crystals. For strong confinement, the crystalline structure can be predicted based on classical energetics. However, clusters of specific numbers of particles (i.e., N=12 and N=19) display a {\it non-classical crystalline structure}, stabilized by quantum effects, in an intermediate range of confinement strength. In these cases, coexistence of quantum and classical crystalline configurations is observed at finite temperature.

5 pages, 4 figures

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Cited by in corpus (11)

• Dipolar physics: A review of experiments with magnetic quantum gases
• Simulation and understanding of quantum crystals
• Classical and quantum filaments in the ground state of trapped dipolar Bose gases
• Nonlinear density response from imaginary-time correlation functions: Ab initio path integral Monte Carlo simulations of the warm dense electron gas
• Superfluidity of strongly correlated bosons in two- and three-dimensional traps
• Density functional theory for strongly-correlated bosonic and fermionic ultracold dipolar and ionic gases
• Ab initio Path Integral Monte Carlo Simulations of Quantum Dipole Systems in Traps: Superfluidity, Quantum Statistics, and Structural Properties
• Quantum phases of dipolar rotors on two-dimensional lattices
• Quantum crystallography of Rydberg-dressed Bose gases on a square lattice
• Systematics of small parahydrogen clusters in two dimensions
• Superfluid response of two-dimensional parahydrogen clusters in confinement