Graduate Fellowships at LSU
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Fig.
2:
Thermal evolution of the physics near a QCP with temperature
decreasing in the foreground. Green oval represents unpaired spin
complexes responsible for the inelastic scattering which causes the
non-Fermi liquid behavior. Light blue oval region demonstrates that
the majority of the magnetic moments in the system are coupled into
a singlet state. Fig
1:
The origin of the quantum critical point in the Hubbard model is a
long standing question. Using very large scale simulations, we find
it is associated with the second order terminus of a line of first
order transitions. As a function of a control parameter this
critical point may be driven to zero temperature, yielding the
quantum critical phenomena.