In the standard interpretation of quantum mechanics, the quantum state, also called a wavefunction or state vector, is the most complete description that can be given to a physical system. Solutions to Schrödinger's equation describe not only atomic and subatomic systems, electrons and atoms, but also macroscopic systems, possibly even the whole universe. The equation is named after Erwin Schrödinger, who discovered it in 1926.
Schrödinger's equation can be mathematically transformed into Heisenberg's matrix mechanics, and into Feynman's path integral formulation. The Schrödinger equation describes time in a way that is inconvenient for relativistic theories, a problem which is not as severe in Heisenberg's formulation and completely absent in the path integral.
(From Wikipedia: http://en.wikipedia.org/wiki/Schr%C3%B6dinger_equation)
It's things like these that just make me wish I was better at the mathematical part of science. I really frickin' wish I knew exactly what all this is about. It's akin to a wormhole in my head leading to a whole new paradigm of knowledge that I could have but don't because I lack the electromagnetic field and space-time requirements for it.
Quantum physics - The dreams stuff is made of.
Avenged Sevenfold - Dear God