Southwest Quantum Information and Technology

Deterministic squeezed states with joint measurements and feedback

Presenting Author: Graham Greve, JILA, NIST, and University of Colorado-Boulder
Contributing Author(s): Kevin Cox, James Thompson

Entangled states of atoms are becoming increasingly practical as a resource for enhancing precision measurements. In a recent experiment, we generated and directly observed 17.6(4) dB of spin squeezing using a quantum non-demolition (QND) measurement, the largest amount of directly observed spin squeezing reported to date. Furthermore, we implemented real-time feedback in order to steer to a target quantum state with angular resolution 7.6 dB below the standard quantum limit, the first demonstration of deterministic squeezing based on joint measurements and feedback.

(Session 5 : Thursday from 5:00 - 7:00 pm)