The Benedek group uses theory and first-principles calculations to advance fundamental understanding and create design rules for new classes of materials that may host new phenomena and properties. We are particularly interested in understanding and controlling the structures and properties of materials out of equilibrium. Recent work includes understanding how to induce extreme changes in material properties through ultrafast optical control of the crystal lattice (nonlinear phononics). Another major focus is on exploring the mechanisms of thermal transport in materials, with a view towards formulating design principles for dynamically controllable transport properties