Gaussian quantum metrology and space-time probes
He derived new formulas for the optimal precision of estimating multiple parameters encoded in Gaussian quantum states, found the figure of merit (quantum Fisher information) can behave discontinuously, and showed that using a quantum reference frame counters the precision loss when two parties exchanging a state don't share a reference frame.
— In our words · Source: Gaussian quantum metrology and space-time probes (Dominik Šafránek)