The GPE Hamiltonian node defines the total energy of the system modelled by the Gross-Pitaevskii equation describing the mean field of Bose-Einstein condensates. It is the first building block to get the energy spectrum of a system.
The node has the following inputs:
The content in the node shows what is being calculated. It is the sum of the kinetic and potential energy and a non-linear term describing the self-interaction strength.
The node outputs the Hamiltonian based on the GPE
In the example below, the GPE Hamiltonian has a harmonic oscillator potential as the potential function and the self-interaction strength of the system is equal to 1.