seemps.state.MPSSum

class seemps.state.MPSSum(weights, states, check_args=True)

Class representing a weighted sum (or difference) of two or more MPS.

This class is an intermediate representation for the linear combination of MPS quantum states. Assume that \(\psi, \phi\) and \(\xi\) are MPS and \(a, b, c\) some real or complex numbers. The addition \(a \psi - b \phi + c \xi\) can be stored as MPSSum([a, -b, c], [ψ, ϕ, ξ]).

Parameters:

weightslist[Weight]

Real or complex numbers representing the weights of the linear combination.

stateslist[MPS]

List of matrix product states weighted.