Ground-state preparation via nonlinear quantum dissipation
This work introduces Quantum Landau–Lifshitz-Gilbert (QLLG) dynamics as a real-time, nonlinear method to find the lowest energy state in complex quantum systems. By using an effective Hamiltonian with damping, QLLG evolution selectively suppresses excited states while driving the system towards its ground state. This provides a scalable way to prepare ground states in finite time.