Alternatives to Order at T=0

03/26/2021 - 3:30pm to 4:30pm
Speaker(s) / Presenter(s): 
Meigan Aronson (UBC)
Type of Event (for grouping events):

Host: Gannon


Electrons in quantum materials are wavelike, displaying both tunneling and interference. They
spontaneously fluctuate among states, and their wavefunctions can be entangled over
macroscopic length scales. The quantum revolution will likely exploit these properties in new
technologies as diverse as sensors with unprecedented sensitivity, logic gates enabling quantum
computation, and new devices that transport heat and electricity very differently from
conventional materials. Of central importance is the tension between quantum fluctuations that
limit the stability of magnetically ordered states at T=0, and strong electronic interactions that
favor moment formation and ordered phases. These novel phases host fundamental excitations
that are wholly unlike those of conventional insulators and metals, and are themselves unstable
to the formation of other phases, notably unconventional superconductivity. Investigating these
wholly novel types of phase transitions requires the identification of new materials where
different aspects can be isolated, as well as experimental tools that can probe the spatial and
dynamic correlations in more powerful ways.
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