Hey all,(adsbygoogle = window.adsbygoogle || []).push({});

I got some question referring to the interaction picture. For example:

I have the Hamiltonian ##H=sum_k w_k b_k^\dagger b_k + V(t)=H1+V(t)##

When I would now have a time evolution operator:

##T exp(-i * int(H+V))##.

(where T is the time ordering operator)

How can I transform it into the interaction picture?

Do I have to calculate:

##exp[i H(1)t]T exp(-i int(H+V))exp[-i H(1)t]##

This is nearly impossible, isn't it?

Best

(is it possible to use latex here?)

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Interaction picture - time evolution operator

Tags:

**Physics Forums | Science Articles, Homework Help, Discussion**