- #1
Happiness
- 690
- 31
Suppose Q=2x+t and x=t2, then ∂Q/∂t=1.
But Q can also be written as Q=x+t2+t, then ∂Q/∂t=2t+1.
We now have 2 different answers. But I think there can only be one correct answer.
In reference to the equation in the image, no matter we write Q=2x+t or Q=x+t2+t, <Q> should be the same, so the LHS should be the same. But when we have 2 different answers for ∂Q/∂t, the RHS would not be the same. So we have a contradiction.
Q is an observable of a quantum system. LHS stands for left hand side of the equation.
But Q can also be written as Q=x+t2+t, then ∂Q/∂t=2t+1.
We now have 2 different answers. But I think there can only be one correct answer.
In reference to the equation in the image, no matter we write Q=2x+t or Q=x+t2+t, <Q> should be the same, so the LHS should be the same. But when we have 2 different answers for ∂Q/∂t, the RHS would not be the same. So we have a contradiction.
Q is an observable of a quantum system. LHS stands for left hand side of the equation.