It has been recognized for many years that at certain quantum phase transitions the standard Landau-Ginzburg-Wilson paradigm will break down. The most striking situation is when either phase is itself Landau allowed but the transition is Landau forbidden. This is exemplified by the quantum phase transition between Neel and VBS phases of square lattice spin-1/2 magnets. In this talk I will describe recent advances in our understanding of the structure of the field theories for this transition. These advances rely heavily on the recently discovered dualities of 2+1-dimensional quantum field theories.
Senthil Todadri (Massachusetts Institute of Technology, USA)
Date & Time
Fri, 07 July 2017, 15:00 to 16:00
Madhava Lecture Hall, ICTS Campus, Bangalore