Single-particle vs. pair superfluidity in a bilayer system of dipolar bosons
arXiv:1407.6805 · doi:10.1103/PhysRevA.90.043623
Abstract
We consider the ground state of a bilayer system of dipolar bosons, where dipoles are oriented by an external field in the direction perpendicular to the parallel planes. Quantum Monte Carlo methods are used to calculate the ground-state energy, the one-body and two-body density matrix, and the superfluid response as a function of the separation between layers. We find that by decreasing the interlayer distance for fixed value of the strength of the dipolar interaction, the system undergoes a quantum phase transition from a single-particle to a pair superfluid. The single-particle superfluid is characterized by a finite value of both the atomic condensate and the super-counterfluid density. The pair superfluid phase is found to be stable against formation of many-body cluster states and features a gap in the spectrum of elementary excitations.
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References in corpus (11)
- Strongly correlated 2D quantum phases with cold polar molecules: controlling the shape of the interaction potential
- Strong Coulomb drag and broken symmetry in double-layer graphene
- Quantum phase transition in a two-dimensional system of dipoles
- Applications of quantum Monte Carlo methods in condensed systems
- Coulomb Drag in the Exciton Regime in Electron-Hole Bilayers
- Quantum phases of a Two-Dimensional Dipolar Fermi Gas
- Interlayer superfluidity in bilayer systems of fermionic polar molecules
- Two-dimensional scattering and bound states of polar molecules in bilayers
- Quantum phase transitions of polar molecules in bilayer systems
- Bose-Einstein Quantum Statistics and the Ground State of Solid 4He
- Weakly interacting two-dimensional system of dipoles: limitations of mean-field theory
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