Ma. Aguilar et M. Socolovsky, NATURALNESS OF THE SPACE OF STATES IN QUANTUM-MECHANICS, International journal of theoretical physics, 36(4), 1997, pp. 883-921
We show how certain constructions of quantum mechanics, like monopoles
, instantons, and the Schrodinger-von Neumann equation, are related to
geometric functors which are representable. We study the differential
geometry of the projective bundle associated with an infinite-dimensi
onal separable Hilbert space, and we construct a universal connection
which is described as a subspace of skew-Hermitian operators. This con
nection is responsible for the Berry phase.