Quantum technologies exploit entanglement to revolutionize computing, measurements, and
communications. This has stimulated the research in different areas of physics to engineer …

Quantum entanglement has been generated and verified in cold-atom experiments and
used to make atom-interferometric measurements below the shot-noise limit. However …

Open quantum systems can have exceptional points (EPs), degeneracies where both
eigenvalues and eigenvectors coalesce. Recently, it has been proposed and demonstrated …

Although SU (1, 1) interferometry achieves Heisenberg-limited sensitivities, it suffers from
one major drawback: Only those particles outcoupled from the pump mode contribute to the …

Useful quantum metrology requires nonclassical states with a high particle number and
(close to) the optimal exploitation of the state's quantum correlations. Unfortunately, the …

Entanglement-assisted quantum communication employs preshared entanglement between
sender and receiver as a resource. We apply the same framework to quantum metrology …

We study quantum metrology for unitary dynamics. Analytic solutions are given for both the
optimal unitary state preparation starting from an arbitrary mixed state and the …

We investigate the performance of quantum parameter estimation based on a qubit probe in
a dissipative bosonic environment beyond the traditional paradigm of weak-coupling and …

We explore the possibility of testing the quantum nature of the gravitational field with an
ensemble of ultra-cold atoms. The use of many microscopic particles may circumvent some …

We consider the role of detection noise in quantum-enhanced metrology in collective spin
systems and derive a fundamental bound for the maximum obtainable sensitivity for a given …