Matrix Product States and Matrix Product Operations

A mutable struct representing a Matrix Product Operator (MPO) tensor in a tensor network.

Fields

• top::Vector{Tensor{T, 2}}: Vector of tensors representing the top tensor of the MPO. Empty if N == 2.
• ctr::Union{Tensor{T, N}, Nothing}: Central tensor of the MPO. Nothing if not present.
• bot::Vector{Tensor{T, 2}}: Vector of tensors representing the bottom tensor of the MPO. Empty if N == 2.
• dims::Dims{N}: Dimensions of the MPO tensor.

Description

MpoTensor{T, N} is a mutable struct that represents a Matrix Product Operator tensor in a tensor network. The MPO tensor is characterized by its top and bottom tensors, a central tensor (ctr), and dimensions (dims). The top and bottom legs are vectors of two-dimensional tensors (Tensor{T, 2}). The central tensor is of type Tensor{T, N} or Nothing if not present. The dimensions of the MPO tensor are specified by dims.