Freiburg 2019 – scientific programme
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FM: Fall Meeting
FM 12: Quantum Sensing: Hardware Platforms
FM 12.4: Talk
Monday, September 23, 2019, 15:00–15:15, 2006
Quantum sensing with ultracold atomic collisions — •Krzysztof Jachymski1, Tomasz Wasak2, Antonio Negretti3, and Tommaso Calarco1 — 1Forschungszentrum Jülich, Institute of Quantum Control (PGI-8), Jülich, Germany — 2Max Planck Institute for the Physics of Complex Systems, Dresden, Germany — 3Zentrum für Optische Quantentechnologien, Universität Hamburg, Hamburg, Germany
Feshbach resonances, which allow for tuning the interactions of ultracold atoms with an external magnetic field, have been widely used to control the properties of quantum gases. We propose a scheme for using scattering resonances as a probe for external fields, showing that by carefully tuning the parameters it is possible to reach a 10^-5G (or nT) level of precision with a single pair of atoms. We show that for our collisional setup it is possible to saturate the quantum precision bound with a simple measurement protocol.