Speaker
Description
The matrix product state (MPS) can efficiently approximate low-entanglement states in 1D quantum many-body systems. However, applications to the gapless phase, periodic boundary case, and higher-dimensional systems are limited due to rapid growth of entanglement. Recently, Clifford-circuit-augmented MPS has been proposed as a hybrid ansatz of the Clifford circuit and MPS. The Clifford circuit is easily simulable on classical computers and plays the role of a disentangler. Thus, the CAMPS can describe strongly entangled states with smaller bond dimensions than the ordinary MPS. In this work, we developed a library of the CAMPS version of the density-matrix renormalization group (DMRG) and applied it to various models. We show that CAMPS can be a suitable ansatz for systems with periodic boundary conditions or in two dimensions.