Square of MPO
Posted: 11 May 2020, 10:43
Hello,
does anybody know an _easy_ way to compute the square of a MPO/model? I want to compute something like
\((\Delta H)^2 = <H>^2 - <H^2>\)
to check how good an Eigenstate my result is.
Defining a new model that is the square of the Hamiltonian by hand seems rather cumbersome (and doesnt lead to a nice nn-coupling model) and I was hoping there is a quick and dirty way to calculate it directly.
Best regards,
Korbinian
does anybody know an _easy_ way to compute the square of a MPO/model? I want to compute something like
\((\Delta H)^2 = <H>^2 - <H^2>\)
to check how good an Eigenstate my result is.
Defining a new model that is the square of the Hamiltonian by hand seems rather cumbersome (and doesnt lead to a nice nn-coupling model) and I was hoping there is a quick and dirty way to calculate it directly.
Best regards,
Korbinian