![BLOCK_LOGO](https://ma.issp.u-tokyo.ac.jp/wp-content/uploads/sites/3/2018/02/image.jpeg)
BLOCK
An open-source application for quantum chemical calculation based on the density-matrix renormalization group (DMRG). For systems with a number of atomic orbitals, low-lying energy eigenvalues can be calculated in high accuracy of order of 1kcal/mol. This application is suitable especially to calculation of multi-orbital systems with one-dimensional topology such as chain-like or circular-like configuration of orbits.