{"title":"Time Crystals from single-molecule magnet arrays","authors":"Subhajit Sarkar, Yonatan Dubi","doi":"arxiv-2409.10816","DOIUrl":null,"url":null,"abstract":"Time crystals, a unique non-equilibrium quantum phenomenon with promising\napplications in current quantum technologies, mark a significant advance in\nquantum mechanics. Although traditionally studied in atom-cavity and optical\nlattice systems, pursuing alternative nanoscale platforms for time crystals is\ncrucial. Here we theoretically predict discrete time-crystals in a periodically\ndriven molecular magnet array, modeled by a spin-S Heisenberg Hamiltonian with\nsignificant quadratic anisotropy, taken with realistic and experimentally\nrelevant physical parameters. Surprisingly, we find that the time-crystal\nresponse frequency correlates with the energy levels of the individual magnets\nand is essentially independent of the exchange coupling. The latter is\nunexpectedly manifested through a pulse-like oscillation in the magnetization\nenvelope, signaling a many-body response. These results show that molecular\nmagnets can be a rich platform for studying time-crystalline behavior and\npossibly other out-of-equilibrium quantum many-body dynamics.","PeriodicalId":501226,"journal":{"name":"arXiv - PHYS - Quantum Physics","volume":"22 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Quantum Physics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.10816","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Time crystals, a unique non-equilibrium quantum phenomenon with promising
applications in current quantum technologies, mark a significant advance in
quantum mechanics. Although traditionally studied in atom-cavity and optical
lattice systems, pursuing alternative nanoscale platforms for time crystals is
crucial. Here we theoretically predict discrete time-crystals in a periodically
driven molecular magnet array, modeled by a spin-S Heisenberg Hamiltonian with
significant quadratic anisotropy, taken with realistic and experimentally
relevant physical parameters. Surprisingly, we find that the time-crystal
response frequency correlates with the energy levels of the individual magnets
and is essentially independent of the exchange coupling. The latter is
unexpectedly manifested through a pulse-like oscillation in the magnetization
envelope, signaling a many-body response. These results show that molecular
magnets can be a rich platform for studying time-crystalline behavior and
possibly other out-of-equilibrium quantum many-body dynamics.