- #1
chuckschuldiner
- 16
- 0
Let phi(x) and phi_dagger(x) be field operators which satisfy the appropriate commutation relations.
Then is there any analytic approximation for the two particle density matrix given by
<phi_dagger(x)phi_dagger(x')phi(x')phi(x)>
Thanks!
Then is there any analytic approximation for the two particle density matrix given by
<phi_dagger(x)phi_dagger(x')phi(x')phi(x)>
Thanks!