Second order transport from anomalies

Second Order Formalism for Fermions: Anomalies and Species Doubling

A new formulation for fermions on the lattice based on a discretization of a second order formalism is proposed. A comparison with the first order formalism in connection with the U(1) anomaly and the doubling problem is presented. The new formulation allows to eliminate half of the degrees of freedom, which can be important in non-perturbative calculations, and it can open new possibities to t...

Second-Order Rate-Control Based Transport Protocols

We propose an efficient flow and error control scheme for highthroughput transport protocols by using a second-order rate control, called the -control, and a new sliding-window scheme for error control. The -control minimizes the packet retransmissions by adjusting the rate-gain parameter to the variations in the number and round-trip times (RTTs) of cross-traffic flows that share the bottlenec...

Discrete second order adjoints in atmospheric chemical transport modeling

Second-order Poisson Nernst-Planck solver for ion channel transport.

The Poisson Nernst-Planck (PNP) theory is a simplified continuum model for a wide variety of chemical, physical and biological applications. Its ability of providing quantitative explanation and increasingly qualitative predictions of experimental measurements has earned itself much recognition in the research community. Numerous computational algorithms have been constructed for the solution o...

Second-order time evolution of PN equations for radiation transport

Using polynomials to represent the angular variation of the radiation intensity is usually referred to as the PN or spherical harmonics method. For infinite order, the representation is an exact solution of the radiation transport solution. For finite N, in some physical situations there are oscillations in the solution that can make the radiation energy density be negative. For small N, the os...