From <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi mathvariant="normal">SU</mml:mi><mml:mo>(</mml:mo><mml:mn>2</mml:mn><mml:mo>)</mml:mo></mml:mrow><mml:mn>5</mml:mn></mml:msub></mml:math> to <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mrow><mml:mi mathvariant="normal">SU</mml:mi><mml:mo>(</mml:mo><mml:mn>2</mml:mn><mml:mo>)</mml:mo></mml:mrow><mml:mn>3</mml:mn></mml:msub></mml:math> Wess-Zumino-Witten transitions in a frustrated spin-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mfrac><mml:mn>5</mml:mn><mml:mn>2</mml:mn></mml:mfrac></mml:math> chain
Natalia Chepiga, Ian Affleck, Frédéric Mila
Abstract
The authors have identified critical points in the Wess-Zumino-Witten (WZW) SU(2)${}_{5}$ universality class in the phase diagram of a spin-5/2 chain with frustrated next-nearest-neighbor and 3-site interactions, providing a concrete example of this universality class in a realistic, nonintegrable model. These points lie on a transition line to a dimerized phase and occur when the transition turns from first order into WZW SU(2)${}_{3}$ in agreement with the generic possibilities allowed by field theory arguments.
Topics & Concepts
Phase diagramRenormalization groupPhase transitionPhysicsCrystallographyk-nearest neighbors algorithmPhase (matter)Condensed matter physicsChemistryMathematical physicsComputer scienceQuantum mechanicsMachine learningQuantum many-body systemsAlgebraic structures and combinatorial modelsPhysics of Superconductivity and Magnetism