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SUMMARY:New Horizons in Quantum Criticality - Andrew Green (St Andrews)
DTSTART:20110223T141500Z
DTEND:20110223T151500Z
UID:TALK28741@talks.cam.ac.uk
CONTACT:Dr Jock McOrist
DESCRIPTION:The ideas of quantum criticality have proven a powerful unifyi
 ng tool for a broad range of strongly correlated quantum systems. I will r
 eview the basic notions underlying quantum criticality and the different t
 ypes of systems to which they apply.\n\nI will concentrate in particular u
 pon quantum criticality in metals. Although the term quantum criticality w
 as first coined in the study of such systems\, there is strong evidence fr
 om both experiment and theory that metallic quantum critical points are in
 trinsically unstable. I will describe a recently developed approach to und
 erstanding this instability in terms of quantum order-by-disorder.\n\nI wi
 ll briefly  compare this to other techniques such as the critical nodal su
 rface and the remarkable AdS/CFT correspondence. I will end with some spec
 ulations about the relationship between these various approaches and the d
 irection in which a synthesis might eventually be found.
LOCATION:MR2\, Centre for Mathematical Sciences
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