Department of Physics & Astronomy
University of New Mexico

Physics and Astronomy Colloquium

Dynamical fermionization

Presented by David Weiss, Penn State University

I will describe experiments with one-dimensional (1D) Bose gases, made with ultracold atoms trapped in tubes made from light. Because the 1D Bose gases we study are "integrable" many-body systems, they have infinite sets of conserved quantities, unlike the usual few (energy, momentum, angular momentum) that are conserved in non-integrable systems. I will describe how we measure the never-before-measured extra conserved quantities. In the process we observe "dynamical fermionization", where the momentum distribution of a strongly interacting 1D Bose gas transforms into that of a non-interacting Fermi gas. We also observe the dramatic behavior of bosonic-fermionic oscillations, which are what they sound like. Prior knowledge of cold atom experiments and integrable many-body systems will not be necessary to follow this talk.

3:30 pm, Friday, September 27, 2019
Room 125, Dane Smith Hall
Southwest corner of Las Lomas and Yale, Albuquerque, New Mexico

Refreshments will be available before the colloquium, at 3:15 pm, in the lobby of Dane Smith Hall.

Disability NoticeIndividuals with disabilities who need an auxiliary aid or service to attend or participate in P&A events should contact Sandra Ortiz (phone: 505-277-5900, email: sportiz@unm.edu) well in advance to ensure your needs are accomodated. Event handouts can be provided in alternative accessible formats upon request. Please contact Mrs. Ortiz if you need written information in an alternative format.

A schedule of talks within the Department of Physics and Astronomy is available on the P&A web site at http://physics.unm.edu/pandaweb/events/index.php