Doublet State
In quantum mechanics, a doublet is a quantum state of a system with a spin of 1/2, such that there are two allowed values of the spin component, −1/2 and +1/2. Quantum systems with two possible states are sometimes called two-level systems. Essentially all occurrences of doublets in nature arise from rotational symmetry; spin 1/2 is associated with the fundamental representation of the Lie group SU(2), the group that defines rotational symmetry in three-dimensional space.
Read more about Doublet State: History and Applications
Famous quotes containing the words doublet and/or state:
“Lord Hamlet, with his doublet all unbraced,
No hat upon his head, his stockings fouled,
Ungartered, and down-gyved to his ankle,
Pale as his shirt, his knees knocking each other,
And with a look so piteous in purport
As if he had been loosed out of hell
To speak of horrors.”
—William Shakespeare (1564–1616)
“Whoso taketh in hand to frame any state or government ought to presuppose that all men are evil, and at occasions will show themselves so to be.”
—Sir Walter Raleigh (1552–1618)