Publication : t09/232
Theory of the superglass phase
Biroli G. (CEA, IPhT (Institut de Physique Théorique), F-91191 Gif-sur-Yvette, France)Chamon C. (Physics Department, Boston University, Boston, Massachusetts 02215, USA)
Zamponi F. (Laboratoire de Physique Théorique, École Normale Supérieure, CNRS-UMR 8549, 24 Rue Lhomond, 75231 Paris Cedex 05, France)
Abstract:Année de publication : 2009
A superglass is a phase of matter which is characterized at the same time by superfluidity and a frozen amorphous structure. We introduce a model of interacting bosons in three dimensions that displays this phase unambiguously and that can be analyzed exactly or using controlled approximations. Employing a mapping between quantum Hamiltonians and classical Fokker-Planck operators, we show that the ground state wavefunction of the quantum model is proportional to the Boltzmann measure of classical hard spheres. This connection allows us to obtain quantitative results on static and dynamic quantum correlation functions. In particular, by translating known results on the glassy dynamics of Brownian hard spheres we work out the properties of the superglass phase and of the quantum phase transition between the superfluid and the superglass phase.
Revue : Phys. Rev. B 78 224306 (2009)
DOI : 10.1103/PhysRevB.78.224306
Preprint : arXiv:0807.2458
Lien : http://link.aps.org/doi/10.1103/PhysRevB.78.224306
PACS : 61.43.Fs; 05.30.Jp; 67.80.K-
Keywords : glass, ground states, noncrystalline structure, superfluidity, wave functions
Langue : Anglais
Fichier(s) à télécharger :
publi.pdf
