There is some excitement in the net about some news of Harold White’s experiment at NASA. I have uncovered it by chance at a forum… 355 more words

## Tags » Mathematical Physics

#### Recent Publisher’s Picks in JPhysA

In our latest Publisher’s Picks:

Andrew Essin and Victor Gurarie discuss their work on disordered topological insulators providing a general proof that such topological insulators have at least one delocalized state at their boundary. 71 more words

#### Bouncing a quantum particle back and forth

If you have not seen my previous two posts, you should read them first.

In the two previous posts, I shot particles (okay, simulated the shooting on a computer) at a single potential barrier and looked at what happens. 568 more words

#### ... and scattering a quantum particle

In the previous post we shot a classical particle at a potential barrier. In this post we shoot a quantum particle.

Whereas the behaviour of the classical particle is governed by… 865 more words

#### Pedro Vieira at the Perimeter Institute

Today’s news are nice indeed for a Portuguese such as me with a persistent enthusiasm for Science, and Physics in particular. I must say that I didn’t know… 334 more words

#### Self Gravitating Incompressible Fluid in Two Dimensions [EPA]

http://arxiv.org/abs/1504.02798

In this paper we develop two models for the steady states and evolution of two dimensional isothermal self gravitating and rotating incompressible gas which are based on the hydrodynamic equations for stratified fluid. 98 more words

#### Abstract-index notation and basics of spinors

When I learned about tensors and spinors, I really get to like abstract-index notation introduced by Penrose, because this notation share much advantages of component-dependent notation like physicist love and is indepedent from any particular choice of coordinates like mathematician love. 204 more words