Quantum simulator reveals conformal-field-theory spectra at Ising and tricritical Ising criticality
Researchers directly measure the finite-size energy spectra of emergent conformal field theories at quantum critical points using a programmable Rydberg-atom chain, resolving Ising and tricritical Ising CFT spectra via modulation spectroscopy and boundary-condition control, and demonstrating a method to diagnose universality classes and study dynamical structure factors in quantum simulators.