You are here: Home / Seminars / Seminar Database / CAMP Seminar: Quantum Fluids 3He and 4He: Dynamics and new phase transitions

CAMP Seminar: Quantum Fluids 3He and 4He: Dynamics and new phase transitions

Main Content

CAMP Seminar by Eckhard Krotscheck, University of Buffalo SUNY.
When
22 April 2014 from 3:30 PM to 4:30 PM
Where
339 Davey Laboratory
Contact Name
Contact Phone
(814) 863-0165
Add event to calendar
vCal
iCal

The structure of quantum fluids is nowadays well understood from modern methods of quantum many-body theory, until recently the understanding of dynamic features has been much more limited. For that purpose, we introduce the concept of dynamic multiparticle fluctuations which permits, when carried out to sufficiently high order, a quantitative prediction of the dynamic structure function of 3He and 4He in 3D. Carrying out the same types of calculations in 2D leads to somewhat surprising results which permit, in 3He, a decisive identification of the relevant physical effects responsible for the energetics of excitations, and may, if experimentally confirmed, illuminate the nature of the “roton minimum” in 4He.  Finally we turn to low-density phases in 2D and 3D. We first demonstrate the predictive power and then examine two cases of current interest: a potential condensed state of quasi two-dimensional 3He and phonon-mediated dimerization of 3He at low density.

 

Seminars