Abstract
Extended mode-coupling theories for dense fluids predict that nonlinear current-density couplings cut off the singular “ideal glass transition” present in the standard mode-coupling theory where such couplings are ignored. We suggest here that, rather than allowing for activated processes as sometimes supposed, contributions from current-density couplings are always negligible close to a glass transition. We discuss in schematic terms how activated processes can nonetheless cut off the transition by causing the memory function to become linear in correlators at late times.
- Received 14 November 2005
DOI:https://doi.org/10.1103/PhysRevLett.96.135701
©2006 American Physical Society