Jorge Campos Gonzalez Angulo - Flipping Spins and Scaling Simulations: From Singlet-Triplet Inversion to Quantum Algorithms for Photochemical Dynamics
Jorge Campos Gonzalez Angulo, University of Toronto
Leuchs-Russell-Auditorium, A.1.500, Staudtstr. 2
Abstract:
OLED technology suffers from a fundamental inefficiency: most of its excitations end up in non-emissive triplet states due to Hund’s first rule. But what if this rule could be bent—or even broken? In the first part of this talk, I will introduce a novel, group-theoretical approach to singlet-triplet inversion (INVEST), using the carbon atom as a case study. This fresh perspective circumvents the limitations of high-level correlated methods, paving the way for rational material design in next-generation optoelectronics.
In the second half, I will present recent advances in the quantum simulation frontier. We’ll explore a scattering-based approach for solving chemically motivated simulation problems with polynomial scaling on quantum hardware. Then, we’ll turn to vibronic dynamics, introducing a quantum algorithm for simulating non-adiabatic processes involving multiple electronic states and vibrational modes. And we’ll see how this method integrates into a materials discovery pipeline for singlet fission solar cell design. These developments expand the range of problems that quantum computers can tackle, laying essential groundwork for realistic applications in photochemistry and materials discovery.