Minimum Entanglement Protocols for Function Estimation
Speaker
Jake Bringewatt(QuICS)
Event Type
Friday Quantum Seminar
Date & Time
October 1, 2021, 12:00pm
Where to Attend
ATL 2324 and Virtual Via Zoom
We derive a family of optimal protocols, in the sense of saturating the quantum Cramér-Rao bound, for measuring a linear combination of d field amplitudes with quantum sensor networks, a key subprotocol of general quantum sensor networks applications. We demonstrate how to select different protocols from this family under various constraints via linear programming. Focusing on entanglement-based constraints, we prove the surprising result that highly entangled states are not necessary to achieve optimality for many problems. Specifically, we prove necessary and sufficient conditions for the existence of optimal protocols using at most k-partite entangled cat-like states.
Pizza and drinks served after the talk.