Adolfo del Campo

Variational Principle for Optimal Quantum Controls in Quantum Metrology

2022 · Physical Review Letters

We develop a variational principle to determine the quantum controls and initial state that optimizes the quantum Fisher information, the quantity characterizing the precision in quantum metrology. When the set of available controls is limited, …

Fighting Exponentially Small Gaps by Counterdiabatic Driving

2024 · arXiv (Cornell University)

We investigate the efficiency of approximate counterdiabatic driving (CD) in accelerating adiabatic passage through exponentially small gaps. First, we analyze a minimal spin-glass bottleneck model that is analytically tractable and exhibits both an exponentially small …