Signatures of the many-body localized regime in two dimensions
Lessons from Anderson localization highlight the importance of the dimensionality of real space for localization due to disorder. More recently, studies of many-body localization have focused on the phenomenon in one dimension using techniques of exact diagonalization and tensor networks. On the oth...
| Main Authors: | , , |
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| Format: | Journal article |
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Springer Nature
2018
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| _version_ | 1826263159716970496 |
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| author | Wahl, T Pal, A Simon, S |
| author_facet | Wahl, T Pal, A Simon, S |
| author_sort | Wahl, T |
| collection | OXFORD |
| description | Lessons from Anderson localization highlight the importance of the dimensionality of real space for localization due to disorder. More recently, studies of many-body localization have focused on the phenomenon in one dimension using techniques of exact diagonalization and tensor networks. On the other hand, experiments in two dimensions have provided concrete results going beyond the previously numerically accessible limits while posing several challenging questions. We present the large-scale numerical examination of a disordered Bose–Hubbard model in two dimensions realized in cold atoms, which shows entanglement-based signatures of many-body localization. By generalizing a low-depth quantum circuit to two dimensions, we approximate eigenstates in the experimental parameter regimes for large systems, which is beyond the scope of exact diagonalization. A careful analysis of the eigenstate entanglement structure provides an indication of the putative phase transition marked by a peak in the fluctuations of entanglement entropy in a parameter range consistent with experiments. |
| first_indexed | 2024-03-06T19:47:17Z |
| format | Journal article |
| id | oxford-uuid:22bde818-70ba-483f-b31f-2424a0d23e3e |
| institution | University of Oxford |
| last_indexed | 2024-03-06T19:47:17Z |
| publishDate | 2018 |
| publisher | Springer Nature |
| record_format | dspace |
| spelling | oxford-uuid:22bde818-70ba-483f-b31f-2424a0d23e3e2022-03-26T11:40:22ZSignatures of the many-body localized regime in two dimensionsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:22bde818-70ba-483f-b31f-2424a0d23e3eSymplectic Elements at OxfordSpringer Nature2018Wahl, TPal, ASimon, SLessons from Anderson localization highlight the importance of the dimensionality of real space for localization due to disorder. More recently, studies of many-body localization have focused on the phenomenon in one dimension using techniques of exact diagonalization and tensor networks. On the other hand, experiments in two dimensions have provided concrete results going beyond the previously numerically accessible limits while posing several challenging questions. We present the large-scale numerical examination of a disordered Bose–Hubbard model in two dimensions realized in cold atoms, which shows entanglement-based signatures of many-body localization. By generalizing a low-depth quantum circuit to two dimensions, we approximate eigenstates in the experimental parameter regimes for large systems, which is beyond the scope of exact diagonalization. A careful analysis of the eigenstate entanglement structure provides an indication of the putative phase transition marked by a peak in the fluctuations of entanglement entropy in a parameter range consistent with experiments. |
| spellingShingle | Wahl, T Pal, A Simon, S Signatures of the many-body localized regime in two dimensions |
| title | Signatures of the many-body localized regime in two dimensions |
| title_full | Signatures of the many-body localized regime in two dimensions |
| title_fullStr | Signatures of the many-body localized regime in two dimensions |
| title_full_unstemmed | Signatures of the many-body localized regime in two dimensions |
| title_short | Signatures of the many-body localized regime in two dimensions |
| title_sort | signatures of the many body localized regime in two dimensions |
| work_keys_str_mv | AT wahlt signaturesofthemanybodylocalizedregimeintwodimensions AT pala signaturesofthemanybodylocalizedregimeintwodimensions AT simons signaturesofthemanybodylocalizedregimeintwodimensions |