In the picture where the coherent state is a massive particle in a quantum harmonic oscillator, the position and momentum operators may be expressed in terms of the annihilation operators in the same formulas above and used to calculate the variances, σ σ x 2 = ℏ ℏ 2 m ω ω , σ σ p 2 = ℏ ℏ m ω ω 2 . Therefore, every coherent state saturates the Kennard bound σ σ x σ σ p = ℏ ℏ 2 m ω ω ℏ ℏ m ω ω 2 = ℏ ℏ 2 . with position and momentum each contributing an amount ℏ ℏ / 2 in a "balanced" way. Moreover, every squeezed coherent state also saturates the Kennard bound although the individual contributions of position and momentum need not be balanced in general.