Entropy. Randomness. Disorder. Think of it as the universe’s tendency to move from ordered to disordered forms. It is a scientific concept of something that increases over time and something that is ...

While usual gapless points that are not geometrically defective i.e. Dirac points (Left column) possess only eigenvalues within [0, 1] (Bottom Left), defective exceptional points (Right column) also ...

This figure shows that for the superposition state of many EPL, they represent an anisotropic measurement characteristic depending on the long axis and short axis of the corresponding ellipse. The ...