# Derivative in Dirac Notation

1. Jul 6, 2009

### Jooya

Hi everybody,

I am trying to get the partial derivative of the following with respect to Si[t] and Phi[t] separately:

Integrate[<Phi[t]|H|Si[t]>]

The operator H is the partial derivative with respect to t.

I tried this in Mathematica, calling

Needs["QuantumNotation"]

but I end up with an strange term : " zz080Bra' "

Any help and advice in this line is appreciated.

2. Jul 7, 2009

### Fredrik

Staff Emeritus
I don't see how to make sense of this. For starters, if $|\phi(t)\rangle$ is a ket, $\phi(t)$ doesn't make sense on its own, and $\partial/\partial\phi(t)$ makes even less sense.