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Description
Clifford circuit is a special type of quantum circuit that can generate entanglement states while remaining easily simulable on classical computers. Recently, Clifford-circuits augmented MPS (CAMPS) has been proposed, which consists of the Clifford circuit and matrix product state (MPS). The CAMPS can describe strongly entangled states with smaller bond dimensions than the ordinary MPS. In this work, we implement the CAMPS version of the density-matrix renormalization group (DMRG) algorithm as a library applicable to general spin-1/2 systems. We test the performance of the algorithm in various spin models and confirm that the Clifford circuit reduces the entanglement entropy of MPS. The Clifford circuit automatically obtained by the algorithm describes a nontrivial unitary transformation into a dual model, such as a unitary analogue of the Kramers-Wannier duality. We also discuss potential applications to gauge theories, not only in 1+1 but also in 2+1 dimensions.