{"684398":{"#nid":"684398","#data":{"type":"event","title":"CPM\/AMO\/Quantum Seminar | School of Physics | Guest speaker Dr. Bastien Lapierre | Princeton University","body":[{"value":"\u003Cdiv\u003E\u003Cp\u003E\u003Cstrong\u003ETitle\u003C\/strong\u003E: Entanglement transitions in structured and random nonunitary Gaussian circuits\u003C\/p\u003E\u003C\/div\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EAbstract\u003C\/strong\u003E: In this talk I will present a family of simple Gaussian non-unitary circuits that lead to rich measurement-induced phase transitions, ranging from area to volume law scalings of the entanglement entropy. In the case of time-periodic non-unitary circuits, there exists a sharp transition from volume to area law. I will show how the full breaking of the time-translation symmetry in a class of quasiperiodic (Fibonacci) circuits leads to even richer entanglement transitions, with extended critical regions characterized by a fractal structure of entanglement separating area and volume law phases. Finally, I will show that the results survive in random circuits thanks to an underlying compact symmetry.\u003C\/p\u003E\u003Cdiv\u003E\u003Cp\u003E\u003Cstrong\u003EBio: \u003C\/strong\u003EBastien Lapierre earned his PhD in 2023 from the University of Z\u00fcrich under the supervision of Titus Neupert and has been a postdoc at Princeton University in the group of Shinsei Ryu since. His research aims at theoretically designing new phases of quantum matter, which include non-equilibrium phases arising in driven, dissipative and monitored quantum systems, as well as topological phases unique to strongly disordered matter.\u003C\/p\u003E\u003C\/div\u003E\u003Cdiv\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003C\/div\u003E","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EIn this talk I will present a family of simple Gaussian non-unitary circuits that lead to rich measurement-induced phase transitions, ranging from area to volume law scalings of the entanglement entropy. In the case of time-periodic non-unitary circuits, there exists a sharp transition from volume to area law. I will show how the full breaking of the time-translation symmetry in a class of quasiperiodic (Fibonacci) circuits leads to even richer entanglement transitions, with extended critical regions characterized by a fractal structure of entanglement separating area and volume law phases. Finally, I will show that the results survive in random circuits thanks to an underlying compact symmetry.\u003C\/p\u003E\u003Cdiv\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003C\/div\u003E\u003Cdiv\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003C\/div\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"Entanglement Transitions in Structured and Random Nonunitary Gaussian Circuits"}],"uid":"36626","created_gmt":"2025-09-04 01:31:57","changed_gmt":"2025-09-04 02:04:38","author":"awilliams675","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2025-09-10T14:00:00-04:00","event_time_end":"2025-09-10T16:00:00-04:00","event_time_end_last":"2025-09-10T16:00:00-04:00","gmt_time_start":"2025-09-10 18:00:00","gmt_time_end":"2025-09-10 20:00:00","gmt_time_end_last":"2025-09-10 20:00:00","rrule":null,"timezone":"America\/New_York"},"location":"Howey Physics Building Room N110","extras":[],"groups":[{"id":"126011","name":"School of Physics"}],"categories":[],"keywords":[],"core_research_areas":[],"news_room_topics":[],"event_categories":[],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}