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VERSION:2.0
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PRODID:-//Virginia Tech//VT Calendar//EN
BEGIN:VEVENT
DTSTAMP:20230108T180000Z
UID:1671572019375@events.msu.edu
CATEGORIES:Conferences / Seminars / Lectures
DTSTART:20230108T180000Z
DTEND:20230108T200000Z
SUMMARY:Helium: from an extremely weakly-bound molecule to superfluidity
DESCRIPTION:
 Abstract\n
 Helium is the only element that remains 
 liquid under normal pressure down to zero 
 temperature. Below 2.17 K, bulk helium-4 is 
 superfluid. Motivated by this intriguing behavior, 
 the properties of finite-sized helium droplets 
 have been studied extensively over the 
 past 30 years or so. Some properties of liquid 
 helium-4 droplets are, just as those of nuclei, 
 well described by the liquid drop model. 
 The existence of the extremely fragile helium 
 dimer was proven experimentally in 1994 in 
 diffraction grating experiments. Since then, 
 appreciable effort has gone into creating and 
 characterizing trimers, tetramers, and larger 
 clusters. The excited state of the helium 
 trimer is particularly interesting since it 
 is an Efimov state. The existence of Efimov states, 
 which are unique due to scale invariance 
 and an associated limit cycle, was predicted 
 in 1971. However, till 2015, Efimov states 
 had-although their existence had been confirmed 
 experimentally-not been imaged directly. 
 Ingenious experimental advances that utilize 
 femtosecond lasers have made it possible to directly 
 image the static quantum mechanical density 
 distribution of helium dimers and trimers. 
 This talk will highlight recent experimental 
 and theoretical work on the helium dimer, 
 helium trimer, and helium droplets.\n
 \n
 Bio\n
 Doerte 
 Blume (she/her/hers) received her PhD 
 in physics in 1998 from the Georg-August University, 
 Goettingen, Germany. After two and a 
 half years of postdoctoral work at JILA/University 
 of Colorado in Boulder, she took up a 
 faculty position in the Department of Physics 
 and Astronomy at Washington State University 
 in the beautiful inland Northwest. In the summer 
 of 2017, Doerte relocated to the Homer L. 
 Dodge Department of Physics and Astronomy at 
 the University of Oklahoma. Doerte is a Fellow 
 of the American Physical Society (APS), a 
 recipient of a Bush Lectureship at the University 
 of Oklahoma, and a Meyer Distinguished 
 Professorship at Washington State University. 
 Her research accomplishments at Washington State 
 University have been recognized through 
 the College of Arts and Sciences Mid-Career Achievement 
 in Scholarship/Creative Activities 
 Award and the College of Sciences Young Faculty 
 Performance Award. Doerte regularly co-organizes 
 conferences of varying size, including 
 the Conference for Undergraduate Women in Physics 
 in 2020. In addition, she has served the 
 scientific community as a member of the APS 
 Division of Atomic, Molecular and Optical Physics 
 (DAMOP) Executive Committee, Remote Associate 
 Editor of Physical Review A, Chair of 
 the APS Few-Body Topical Group, and member of 
 the APS Committee on Scientific Publications.\n
 \n\n
 Price: free\n
 Sponsor: public\n
 Contact name: Bob Patterer\n
 Contact email: events@frib.msu.edu\n
 for more info visit the web at:\n 
 https://msu.zoom.us/webinar/register/WN_j4zp2z2SRPCTzH8pGS4P4A\n
LOCATION:Zoom - Facility for Rare Isotope Beams
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