{"id":12321,"date":"2024-04-24T16:25:53","date_gmt":"2024-04-24T14:25:53","guid":{"rendered":"https:\/\/www.uni.lu\/fstm-en\/?post_type=events&p=12321"},"modified":"2024-10-07T14:26:10","modified_gmt":"2024-10-07T12:26:10","slug":"physics-seminar-alberto-ambrosetti","status":"publish","type":"events","link":"https:\/\/www.uni.lu\/fstm-en\/events\/physics-seminar-alberto-ambrosetti\/","title":{"rendered":"Physics seminar"},"content":{"rendered":"\n
\n

\nBeyond the Born-Oppenheimer approximation:
from water superlow in carbon nanotubes, to long-range
electron-nuclear coupling in photoactive proteins<\/h2>\n\n\n\n

Abstract:<\/strong><\/p>\n\n\n\n

In The Born-Oppenheimer (BO) approximation is a powerful and broadly adopted framework, which effectively separates fast electronic degrees of freedom from slow ionic coordinates. While the advantages BO approach are self-evident in electronic structure theories, the main drawback is a classicization of nuclei, which can hide emergent quantum mechanical effects. Here two unexpected beyond-BO quantum mechanisms will be illustrated: i) The first is a quantum mechanical suppression of friction forces for He or water molecules flowing
through narrow carbon nanotubes. This mechanism presents close analogies to superfluidity, and consents virtually non-dissipative mass transport at the nanoscale. ii)The second effect is a highly non-local diabatic coupling between exciton pairs and vibrational modes in photoactive proteins. This coupling mechanism – active in the UV frequency regime- is mediated by van der Waals interactions and enables efficient energy transfer between aromatic amino-acids at distance. Such a coupling provides an efficient alternative to Foerster resonance energy transfer (FRET), and could be exploited by proteins as a self-defence mechanism, by which the energy of potentially dangerous UV photons can be rapidly redistributed through the entire structure.<\/p>\n\n\n\n

About the speaker:<\/strong><\/p>\n\n\n\n

Alberto Ambrosetti is currently an Assistant Professor at the University of Padova. He holds a Master Degree in Physics in Padova 2006, PhD in Physics in Trento 2010 on Quantum Monte Carl. Several postdocs, among which two Years at the Fritz-Haber Institute in Berlin under the supervision of Alexandre Tkatchenko.<\/p>\n\n\n\n

We invite you to follow the seminar online in case you cannot make it in person. <\/p>\n\n\n\n

    \n
  • Meeting number: 2734 857 0382<\/li>\n\n\n\n
  • Meeting password: 4EWshCrDj87   <\/li>\n<\/ul>\n\n\n\n
    • \n Webex link<\/a>\n<\/li>\n<\/ul>\n<\/div><\/section>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":105,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"featured_image_focal_point":[],"show_featured_caption":false,"ulux_newsletter_groups":"","uluxPostTitle":"","uluxPrePostTitle":"","_trash_the_other_posts":false,"_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"event_start_date":"2024-04-25 16:00:00","event_end_date":"2024-04-25 17:30:00","event_speaker_name":"Dr. Alberto Ambrosetti","event_speaker_link":"","event_is_online":false,"event_location":"Campus Limpertsberg ","event_street":"162a, avenue de la Fa\u00efencerie","event_location_link":"https:\/\/www.uni.lu\/en\/about\/campuses\/limpertsberg-campus\/","event_zip_code":"1511","event_city":"Luxembourg","event_country":"Luxembourg"},"events-topic":[315],"events-type":[329,322],"organisation":[80,29,95],"authorship":[105,101,201,103],"acf":[],"yoast_head":"\nPhysics seminar - 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