In superstring theory, each state may be represented in many ways, depending on how the ground state is defined. Each representation is called a picture, and is denoted by a number, such as 0 picture or −1 picture.
The difference between the ground states is according to the action of the superghosts oscillators on them, and the number of the picture (plus 1/2) reflects the highest superghost oscillator which does not annihilate the ground state.
Famous quotes containing the word picture:
“Acting is the physical representation of a mental picture and the projection of an emotional concept.”
—Laurette Taylor (1887–1946)