Fast time evolution of matrix product states using the QR decomposition
Fast time evolution of matrix product states using the QR decomposition
We propose and benchmark a modified time-evolving block decimation algorithm that uses a truncation scheme based on the QR decomposition instead of the singular value decomposition (SVD). The modification reduces the scaling with the dimension of the physical Hilbert space $d$ from ${d}^{3}$ down to ${d}^{2}$. Moreover, the QR decomposition …