Abstract
In the context of non-critical Liouville strings, we clarify why we expect non-quantum-mechanical dissipative effects to be where E is a typical energy scale of the probe, and is the Planck scale. In Liouville strings, energy is conserved at best only as a statistical average, as distinct from Lindblad systems, where it is strictly conserved at an operator level, and the magnitude of dissipative effects could only be much smaller. We also emphasize the importance of nonlinear terms in the evolution equation for the density matrix, which are important for any analysis of complete positivity.
- Received 1 August 2000
DOI:https://doi.org/10.1103/PhysRevD.63.024024
©2000 American Physical Society