matrix

Method of RealMPO.

matrix() -> RealMatrix

Convert an MPO to a full matrix representation.

danger

Dense conversion scales exponentially with the number of sites. The resulting dense operator matrix has shapes $d^{L} \times d^{L}$ where $d$ is the local physical dimension and $L$ the number of sites. Use only for small systems (typically $L \leq 10$ for $d=2$).

Returns

A 2D array representing the full matrix form of the operator.