{"oa_version":"Submitted Version","oa":1,"date_created":"2018-12-11T11:45:40Z","user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","publisher":"Nature Publishing Group","scopus_import":"1","quality_controlled":"1","title":"Weak ergodicity breaking from quantum many-body scars","status":"public","type":"journal_article","day":"14","article_processing_charge":"No","month":"05","date_updated":"2023-09-19T10:37:55Z","publication_status":"published","date_published":"2018-05-14T00:00:00Z","department":[{"_id":"MaSe"}],"abstract":[{"lang":"eng","text":"The thermodynamic description of many-particle systems rests on the assumption of ergodicity, the ability of a system to explore all allowed configurations in the phase space. Recent studies on many-body localization have revealed the existence of systems that strongly violate ergodicity in the presence of quenched disorder. Here, we demonstrate that ergodicity can be weakly broken by a different mechanism, arising from the presence of special eigenstates in the many-body spectrum that are reminiscent of quantum scars in chaotic non-interacting systems. In the single-particle case, quantum scars correspond to wavefunctions that concentrate in the vicinity of unstable periodic classical trajectories. We show that many-body scars appear in the Fibonacci chain, a model with a constrained local Hilbert space that has recently been experimentally realized in a Rydberg-atom quantum simulator. The quantum scarred eigenstates are embedded throughout the otherwise thermalizing many-body spectrum but lead to direct experimental signatures, as we show for periodic recurrences that reproduce those observed in the experiment. Our results suggest that scarred many-body bands give rise to a new universality class of quantum dynamics, opening up opportunities for the creation of novel states with long-lived coherence in systems that are now experimentally realizable."}],"main_file_link":[{"url":"http://eprints.whiterose.ac.uk/130860/","open_access":"1"}],"intvolume":"        14","publist_id":"7585","volume":14,"year":"2018","isi":1,"acknowledgement":"C.J.T., A.M. and Z.P. acknowledge support from EPSRC grants EP/P009409/1 and EP/M50807X/1, and Royal Society Research Grant RG160635. D.A. acknowledges support from the Swiss National Science Foundation.","author":[{"last_name":"Turner","first_name":"Christopher","full_name":"Turner, Christopher"},{"orcid":"0000-0002-8443-1064","first_name":"Alexios","last_name":"Michailidis","id":"36EBAD38-F248-11E8-B48F-1D18A9856A87","full_name":"Michailidis, Alexios"},{"first_name":"Dmitry","last_name":"Abanin","full_name":"Abanin, Dmitry"},{"first_name":"Maksym","last_name":"Serbyn","id":"47809E7E-F248-11E8-B48F-1D18A9856A87","full_name":"Serbyn, Maksym","orcid":"0000-0002-2399-5827"},{"full_name":"Papić, Zlatko","last_name":"Papić","first_name":"Zlatko"}],"publication":"Nature Physics","doi":"10.1038/s41567-018-0137-5","page":"745 - 749","external_id":{"isi":["000438253600028"]},"citation":{"short":"C. Turner, A. Michailidis, D. Abanin, M. Serbyn, Z. Papić, Nature Physics 14 (2018) 745–749.","apa":"Turner, C., Michailidis, A., Abanin, D., Serbyn, M., &#38; Papić, Z. (2018). Weak ergodicity breaking from quantum many-body scars. <i>Nature Physics</i>. Nature Publishing Group. <a href=\"https://doi.org/10.1038/s41567-018-0137-5\">https://doi.org/10.1038/s41567-018-0137-5</a>","ista":"Turner C, Michailidis A, Abanin D, Serbyn M, Papić Z. 2018. Weak ergodicity breaking from quantum many-body scars. Nature Physics. 14, 745–749.","chicago":"Turner, Christopher, Alexios Michailidis, Dmitry Abanin, Maksym Serbyn, and Zlatko Papić. “Weak Ergodicity Breaking from Quantum Many-Body Scars.” <i>Nature Physics</i>. Nature Publishing Group, 2018. <a href=\"https://doi.org/10.1038/s41567-018-0137-5\">https://doi.org/10.1038/s41567-018-0137-5</a>.","ama":"Turner C, Michailidis A, Abanin D, Serbyn M, Papić Z. Weak ergodicity breaking from quantum many-body scars. <i>Nature Physics</i>. 2018;14:745-749. doi:<a href=\"https://doi.org/10.1038/s41567-018-0137-5\">10.1038/s41567-018-0137-5</a>","ieee":"C. Turner, A. Michailidis, D. Abanin, M. Serbyn, and Z. Papić, “Weak ergodicity breaking from quantum many-body scars,” <i>Nature Physics</i>, vol. 14. Nature Publishing Group, pp. 745–749, 2018.","mla":"Turner, Christopher, et al. “Weak Ergodicity Breaking from Quantum Many-Body Scars.” <i>Nature Physics</i>, vol. 14, Nature Publishing Group, 2018, pp. 745–49, doi:<a href=\"https://doi.org/10.1038/s41567-018-0137-5\">10.1038/s41567-018-0137-5</a>."},"article_type":"original","_id":"296","language":[{"iso":"eng"}]}