Calabi–Yau manifolds are complex manifolds that are higher-dimensional analogues of K3 surfaces. Definitions There are many different inequivalent definitions of a Calabi–Yau manifold used by different authors.
It is a similar but stronger effect than the Voigt effect (in which the medium is a gas instead of a liquid). It was discovered in 1907 by Aimé Cotton and Henri Mouton, working in collaboration.
When a linearly polarized wave propagates perpendicular to magnetic field (e.g. In string theory and related theories, D-branes are an important class of branes that arise when one considers open strings.
As an open string propagates through spacetime, its endpoints are required to lie on a D-brane.
The letter "D" in D-brane refers to the fact that we impose a certain mathematical condition on the system known as the Dirichlet boundary condition.
The study of D-branes has led to important results, such as the anti-de Sitter/conformal field theory correspondence, which has shed light on many problems in quantum field theory.
This article is about gravitation and electromagnetism.
For the mathematical generalization of K theory, see KK-theory.
In 1926, Oskar Klein gave Kaluza's classical 5-dimensional theory a quantum interpretation, to accord with the then-recent discoveries of Heisenberg and Schroedinger.
Leonard Susskind [Photo by Anne Elizabeth Warren] CLR INTERVIEW: Leonard Susskind is the Felix Bloch Professor of theoretical physics at Stanford University.
His new book, The Black Hole Wars, details his battles with Stephen Hawking over the true nature of black holes.
The resulting theory postulates that every object in our world is actually a hologram being projected from the farthest edges of space. A calcite crystal laid upon a graph paper with blue lines showing the double refraction Doubly refracted image as seen through a calcite crystal, seen through a rotating polarizing filter illustrating the opposite polarization states of the two images.