Coherent Spin State

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A Coherent Spin State (CSS) is a collective state describing a collection of spins that are perfectly aligned or polarized in one direction. A CSS in the x-direction, for example, is written

|\textrm{CSS}\rangle_x = |\uparrow\uparrow\cdots\uparrow\rangle_x

This is a particular example of a Dicke State with maximal \vec{F}^2 and Fx eigenvalues.

Also see Spin Squeezed State.

Preparation Methods

See Optical Pumping.

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