1307.8185 (Nuno Costa Dias et al.)

Maximal Covariance Group of Wigner Transforms and Pseudo-Differential
Operators    [PDF]

Nuno Costa Dias, Maurice A. de Gosson, João Nuno Prata

We show that the linear symplectic and anti-symplectic transformations form the maximal covariance group for both the Wigner transform and Weyl operators. The proof is based on a new result from symplectic geometry which characterizes symplectic and anti-symplectic matrices, and which allows us, in addition, to refine a classical result on the preservation of symplectic capacities of ellipsoids.

View original: http://arxiv.org/abs/1307.8185