Hidden Bethe states in a partially integrable model
نویسندگان
چکیده
We present a one-dimensional multicomponent model, known to be partially integrable when restricted the subspaces made of only two components. By constructing fully antisymmetrized bases, we find excited eigenstates corresponding totally antisymmetric irreducible representation permutation operator in otherwise nonintegrable subspaces. establish rigorously breakdown integrability those by showing explicitly violation Yang-Baxter equation. further solve constraints from equation exceptional momenta that allows Bethe ansatz solutions solitonic bound states. These have distinct dynamical consequence embedded previously known, as they do not span their separate Krylov subspaces, and generic initial state can partly overlap with them therefore slow thermalization. However, this novel form weak ergodicity breaking contrasts quantum many-body scars involved necessarily low entanglement. Our approach provides complementary route arrive at exact states models: instead solving towers single-mode based on solvable ground identify survive deformation Hamiltonian away its point.
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ژورنال
عنوان ژورنال: Physical review
سال: 2022
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevb.106.134420