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Title: Mesoscopic supersolid of dipoles in a trap

Abstract

A mesoscopic system of dipolar bosons trapped by a harmonic potential is considered. The system has a number of physical realizations including dipole excitons, atoms with large dipolar moment, polar molecules, and Rydberg atoms in inhomogeneous electric field. We carry out a diffusion Monte Carlo simulation to define the quantum properties of a two-dimensional system of trapped dipoles at zero temperature. In dimensionless units the system is described by two control parameters, namely, the number of particles and the strength of the interparticle interaction. We have shown that when the interparticle interaction is strong enough a mesoscopic crystal is formed. As the strength of interactions is decreased a multistage melting takes place. Off-diagonal order in the system is tested using natural-orbitals analysis. We have found that the system might be Bose condensed even in the case of strong interparticle interactions. There is a set of parameters for which a spatially ordered structure is formed while simultaneously the fraction of Bose-condensed particles is nonzero. This might be considered as a realization of a mesoscopic supersolid.

Authors:
 [1];  [2];  [1];  [3]
  1. Institute of Spectroscopy, 142190 Troitsk, Moscow Region (Russian Federation)
  2. Departament de Fisica i Enginyeria Nuclear, Campus Nord B4-B5, Universitat Politecnica de Catalunya, E-08034 Barcelona (Spain)
  3. (State University), Dolgoprudny, Moscow Region (Russian Federation)
Publication Date:
OSTI Identifier:
22068760
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Other Information: (c) 2011 American Institute of Physics; Country of input: Syrian Arab Republic; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 74 ATOMIC AND MOLECULAR PHYSICS; ATOMS; BOSONS; COMPUTERIZED SIMULATION; DIFFUSION; DIPOLE MOMENTS; DIPOLES; ELECTRIC FIELDS; EXCITONS; HARMONIC POTENTIAL; INTERACTIONS; MOLECULES; MONTE CARLO METHOD; QUANTUM MECHANICS; TRAPPING; TRAPS; TWO-DIMENSIONAL CALCULATIONS

Citation Formats

Golomedov, A. E., Astrakharchik, G. E., Lozovik, Yu. E., and Moscow Institute of Physics and Technology. Mesoscopic supersolid of dipoles in a trap. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.033615.
Golomedov, A. E., Astrakharchik, G. E., Lozovik, Yu. E., & Moscow Institute of Physics and Technology. Mesoscopic supersolid of dipoles in a trap. United States. doi:10.1103/PHYSREVA.84.033615.
Golomedov, A. E., Astrakharchik, G. E., Lozovik, Yu. E., and Moscow Institute of Physics and Technology. Thu . "Mesoscopic supersolid of dipoles in a trap". United States. doi:10.1103/PHYSREVA.84.033615.
@article{osti_22068760,
title = {Mesoscopic supersolid of dipoles in a trap},
author = {Golomedov, A. E. and Astrakharchik, G. E. and Lozovik, Yu. E. and Moscow Institute of Physics and Technology},
abstractNote = {A mesoscopic system of dipolar bosons trapped by a harmonic potential is considered. The system has a number of physical realizations including dipole excitons, atoms with large dipolar moment, polar molecules, and Rydberg atoms in inhomogeneous electric field. We carry out a diffusion Monte Carlo simulation to define the quantum properties of a two-dimensional system of trapped dipoles at zero temperature. In dimensionless units the system is described by two control parameters, namely, the number of particles and the strength of the interparticle interaction. We have shown that when the interparticle interaction is strong enough a mesoscopic crystal is formed. As the strength of interactions is decreased a multistage melting takes place. Off-diagonal order in the system is tested using natural-orbitals analysis. We have found that the system might be Bose condensed even in the case of strong interparticle interactions. There is a set of parameters for which a spatially ordered structure is formed while simultaneously the fraction of Bose-condensed particles is nonzero. This might be considered as a realization of a mesoscopic supersolid.},
doi = {10.1103/PHYSREVA.84.033615},
journal = {Physical Review. A},
issn = {1050-2947},
number = 3,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}