%0 Journal Article
%T Discrete phase space and minimum-uncertainty states
%A William K. Wootters
%A Daniel M. Sussman
%J Physics
%D 2007
%I arXiv
%X The quantum state of a system of qubits can be represented by a Wigner function on a discrete phase space, each axis of the phase space taking values in a finite field. Within this framework, we show that one can make sense of the notion of a "rotationally invariant state" of any collection of qubits, and that any such state is, in a well defined sense, a state of minimum uncertainty.
%U http://arxiv.org/abs/0704.1277v1