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Gapless quantum spin chains: multiple dynamics and conformal wavefunctions
Xiao Chen, Eduardo Fradkin, William Witczak-Krempa
We study gapless quantum spin chains with spin 1/2 and 1: the Fredkin and Motzkin models. Their entangled groundstates are known exactly but not their excitation spectra. We first…
Quantum spin chains with multiple dynamics
Xiao Chen, Eduardo Fradkin, William Witczak-Krempa
Many-body systems with multiple emergent time scales arise in various contexts, including classical critical systems, correlated quantum materials, and ultra-cold atoms. We investi…
Quantum critical response: from conformal perturbation theory to holography
Andrew Lucas, Todd Sierens, William Witczak-Krempa
We discuss dynamical response functions near quantum critical points, allowing for both a finite temperature and detuning by a relevant operator. When the quantum critical point is…