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:
“Poetry, and Picture, are Arts of a like nature; and both are busie about imitation. It was excellently said of Plutarch, Poetry was a speaking Picture, and Picture a mute Poesie. For they both invent, faine, and devise many things, and accommodate all they invent to the use, and service of nature. Yet of the two, the Pen is more noble, than the Pencill. For that can speake to the Understanding; the other, but to the Sense.”
—Ben Jonson (1573–1637)