An analogue of the classical Heisenberg inequality is given for an innite-dimensional space. The proof relies on a commutation relationship and integration by parts formula for Gaussian measure. We also discuss when the equality holds.
【The Heisenberg inequality associated with the uncertainty principle is extended to an infinite dimensional abstract Wiener space (H, B) with an abstract Wiener measure p 1 . For ϕ∈ L 2 (p 1 ) and T ∈ L(B, H), it is shown that (※Equations, See Full-text), where F(sub) ϕ is the Fourier-Wiener transform of ϕ . The conditions when the equality holds also discussed.】