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Ki-Seok Kim (APCTP)

Talk Title: Deconfined local quantum criticality in the holographic approach     

Strongly coupled conformal field theory appears to describe universal scaling around quantum criticality, where critical exponents reflect the nature of emergent excitations. In particular, strong interactions can give rise to quantum number fractionalization, resulting in enhancement of critical exponents and well known in one dimensional correlated systems, the mechanism of which is an interplay between correlations and topological terms. However, it is beyond the present paradigm to confirm higher dimensional generalizations. Resorting to the holographic approach, we claim emergence of fractionalized excitations, the hallmark of which is enhancement of critical exponents, compared with the absence of the topological term.

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