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QI: Fachverband Quanteninformation

QI 9: Quantum Metrology

QI 9.2: Hauptvortrag

Donnerstag, 23. September 2021, 11:15–11:45, H4

On the quantum limits of field sensing — •Morgan Mitchell — ICFO - The Institute of Photonic Sciences, Barcelona, Spain

We discuss the nature and status of “energy resolution” limits in magnetic field sensing. Unlike better-known quantum limits, energy resolution limits constrain directly the sensitivity, with no reference to particle number or any other resource. Today’s best-developed magnetometer technologies are known to be limited to an energy resolution per bandwidth of about ℏ. We discuss the possibility that this is a universal sensing limit, and describe proposed sensing methods that could surpass the ℏ level.

Reference: Mitchell, Morgan W. and Palacios Alvarez, Silvana, “Colloquium: Quantum limits to the energy resolution of magnetic field sensors,” Rev. Mod. Phys. 92, 021001 (2020). https://doi.org/10.1103/RevModPhys.92.021001