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• W1897373642 abstract "We present and test a new algorithm for time-evolving quantum many-body systems initially proposed by Holzner et al. [Phys. Rev. B 83, 195115 (2011)]. The approach is based on merging the matrix product state (MPS) formalism with the method of expanding the time-evolution operator in Chebyshev polynomials. We calculate time-dependent observables of a system of hardcore bosons quenched under the Bose-Hubbard Hamiltonian on a one-dimensional lattice. We compare the new algorithm to more standard methods using the MPS architecture. We find that the Chebyshev method gives numerically exact results for small times. However, the reachable times are smaller than the ones obtained with the other state-of-the-art methods. We further extend the new method using a spectral-decomposition-based projective scheme that utilizes an effective bandwidth significantly smaller than the full bandwidth, leading to longer evolution times than the nonprojective method and more efficient information storage, data compression, and less computational effort." @default.
• W1897373642 created "2016-06-24" @default.
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• W1897373642 date "2015-09-14" @default.
• W1897373642 modified "2023-10-18" @default.
• W1897373642 title "Chebyshev matrix product state approach for time evolution" @default.
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• W1897373642 doi "https://doi.org/10.1103/physrevb.92.115130" @default.
• W1897373642 hasPublicationYear "2015" @default.
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