{"664576":{"#nid":"664576","#data":{"type":"event","title":"School of Physics Colloquium","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ETitle:\u0026nbsp;\u003C\/strong\u003EQuantum information dynamics in many-body systems: a tale of encoding and decoding\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ESpeaker:\u0026nbsp;\u003C\/strong\u003EShenglong Xu\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EHost:\u0026nbsp;\u003C\/strong\u003E\u003Ca href=\u0022https:\/\/physics.gatech.edu\/user\/carlos-sa-de-melo\u0022\u003ECarlos Sa de Melo\u003C\/a\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u0026nbsp;\u003C\/strong\u003ERecent advances in NISQ (Noisy Intermediate-Scale Quantum) technology and cross-disciplinary dialogues have significantly expanded the frontiers of out-of-equilibrium quantum many-body systems. In this talk, I will discuss quantum information dynamics, i.e., the fate of a quantum qubit thrown into a many-body system, as a general framework to study this new dynamical regime. I will show that local quantum information in a strongly interacting system spreads to non-local degrees of freedom in a universal manner, similar to the spread of an epidemic, and is encoded in the many-body Hilbert space in late time. This process, dubbed scrambling, has been observed in cold atoms, superconducting circuits, ion traps, and solid-state NMR experiments. The non-local nature of scrambled quantum information makes it more noise-resilient but challenging to decode. I will present our recent progress in decoding and teleporting quantum information in a prototypical many-body model, the 2D quantum XY model, using exact long-range entangled eigenstates and local measurements. Our protocol is ready to be carried out on current NISQ devices and may open new possibilities for quantum information processing.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EBio\u003C\/strong\u003E:\u0026nbsp;Shenglong Xu is a research assistant professor at Texas A\u0026amp;M University. He obtained his Ph.D. in 2017 from the University of California, San Diego. Before joining TAMU in 2020, he worked as a postdoc in the condensed matter theory center at the University of Maryland. His current research interests include non-equilibrium phenomena in quantum many-body systems, quantum information and entanglement dynamics, and developing algorithms for classical and quantum \u0026nbsp;\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Dr. Shenglong Xu; Quantum information dynamics in many-body systems: a tale of encoding and decoding"}],"uid":"35687","created_gmt":"2023-01-10 00:35:36","changed_gmt":"2023-02-09 23:29:06","author":"kcolebrooke3","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2023-02-13T15:30:00-05:00","event_time_end":"2023-02-13T16:30:00-05:00","event_time_end_last":"2023-02-13T16:30:00-05:00","gmt_time_start":"2023-02-13 20:30:00","gmt_time_end":"2023-02-13 21:30:00","gmt_time_end_last":"2023-02-13 21:30:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"126011","name":"School of Physics"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[{"id":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}