Nonequilibrium phase ordering with a global conservation law

Phase ordering kinetics of a nonequilibrium exciton-polariton condensate

We investigate the process of coarsening via annihilation of vortex-antivortex pairs, following the quench to the condensate phase in a nonresonantly pumped polariton system. We find that the late-time dynamics is an example of universal phase-ordering kinetics, characterized by scaling of correlation functions in time. Depending on the parameters of the system, the evolution of the characteris...

Ordering radiographs with the law in mind.

1352 CAN MED ASSOC J • 15 NOV. 1997; 157 (10) nario, thus choosing a middle-of-theroad decision point. Alternatively, physicians with patients who have specifically requested not to receive transfusions unless the opinion to give the transfusion is shared by a substantial majority of physicians might pick a transfusion decision threshold 2 standard deviations below the mean. It is our hope that...

Overshooting effects in nonequilibrium ordering dynamics.

A global, distributed ordering library

Computing a fill-reducing ordering of a sparse matrix is a critical step for sparse direct solvers. In the early days of the field, “bottom-up” or “greedy” methods were popular. These include the Minimum Degree algorithm [7] and its variants, and profile-reducing methods such as the Cuthill-McKee algorithm [2]. More recently, “top-down” or “divide-and-conquer” methods such as Nested Dissection ...

Nonequilibrium phase transitions associated with DNA replication.

Thermodynamics governing the synthesis of DNA and RNA strands under a template is considered analytically and applied to the population dynamics of competing replicators. We find a nonequilibrium phase transition for high values of polymerase fidelity in a single replicator, where the two phases correspond to stationary states with higher elongation velocity and lower error rate than the other....