Direct computation yields the more general commutator relations, [ x ( t 1 ) , x ( t 2 ) ] = i ℏ ℏ m ω ω sin ⁡ ⁡ ( ω ω t 2 − − ω ω t 1 ) , [ p ( t 1 ) , p ( t 2 ) ] = i ℏ ℏ m ω ω sin ⁡ ⁡ ( ω ω t 2 − − ω ω t 1 ) , [ x ( t 1 ) , p ( t 2 ) ] = i ℏ ℏ cos ⁡ ⁡ ( ω ω t 2 − − ω ω t 1 ) .