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• W2024278802 abstract "We introduce a variational method for calculating dispersion relations of translation invariant ($1+1$)-dimensional quantum field theories. The method is based on continuous matrix product states and can be implemented efficiently. We study the critical Lieb-Liniger model as a benchmark and excellent agreement with the exact solution is found. Additionally, we observe solitonic signatures of Lieb's type II excitation. In addition, a nonintegrable model is introduced where a $U(1)$-symmetry breaking term is added to the Lieb-Liniger Hamiltonian. For this model we find evidence of a nontrivial bound-state excitation in the dispersion relation." @default.
• W2024278802 created "2016-06-24" @default.
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• W2024278802 date "2013-07-09" @default.
• W2024278802 modified "2023-09-23" @default.
• W2024278802 title "Particles, Holes, and Solitons: A Matrix Product State Approach" @default.
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• W2024278802 doi "https://doi.org/10.1103/physrevlett.111.020402" @default.
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