1. Entanglement-enhanced quantum sensing via optimal global control
- Author
-
Srivastava, Vineesha, Jandura, Sven, Brennen, Gavin K, and Pupillo, Guido
- Subjects
Quantum Physics - Abstract
We present a deterministic protocol for the preparation of arbitrary entangled states in the symmetric Dicke subspace of $N$ spins coupled to a common cavity mode. By combining a new geometric phase gate, an analytic solution of the noisy quantum channel dynamics and optimal control methods, the protocol prepares entangled states that are useful for quantum sensing, achieving a precision significantly better than the standard quantum limit in the presence of photon cavity loss, spontaneous emission and dephasing. This work opens the way to entanglement-enhanced sensing with cold trapped atoms in cavities and is also directly relevant for experiments with trapped ions.
- Published
- 2024