Leggett's bound for amorphous solids

Details Leggett's bound for amorphous solids Leggett's bound for amorphous solids

2010-11-12

arxiv.org/abs/1011.2863v2

Phys. Rev. B 83, 094530 (2011)

Physics

Condensed Matter

Disordered Systems and Neural Networks

11 pages, 5 figures

Scientific paper

10.1103/PhysRevB.83.094530

We investigate the constraints on the superfluid fraction of an amorphous solid following from an upper bound derived by Leggett. In order to accomplish this, we use as input density profiles generated for amorphous solids in a variety of different manners including by investigating Gaussian fluctuations around classical results. These rough estimates suggest that, at least at the level of the upper bound, there is not much difference in terms of superfluidity between a glass and a crystal characterized by the same Lindemann ratio. Moreover, we perform Path Integral Monte Carlo simulations of distinguishable Helium 4 rapidly quenched from the liquid phase to very lower temperature, at the density of the freezing transition. We find that the system crystallizes very quickly, without any sign of intermediate glassiness. Overall our results suggest that the experimental observations of large superfluid fractions in Helium 4 after a rapid quench correspond to samples evolving far from equilibrium, instead of being in a stable glass phase. Other scenarios and comparisons to other results on the super-glass phase are also discussed.

Affiliated with

Also associated with

No associations

Rating

Leggett's bound for amorphous solids does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Leggett's bound for amorphous solids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Leggett's bound for amorphous solids will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-203927