SAMOP 2023 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 36: Quantum Metrology (joint session QI/Q)
QI 36.8: Vortrag
Freitag, 10. März 2023, 12:45–13:00, F428
Gradient Magnetometry with Atomic Ensembles — •Iagoba Apellaniz1, Iñigo Urizar-Lanz1, Zoltán Zimborás1,2,3, Philipp Hyllus1, and Géza Tóth1,3,4 — 1Department of Physics, University of the Basque Country UPV/EHU, P. O. Box 644, E-48080 Bilbao, Spain — 2Dahlem Center for Complex Quantum Systems, Freie Universität Berlin, 14195 Berlin, Germany — 3Wigner Research Centre for Physics, Hungarian Academy of Sciences, P.O. Box 49, H-1525 Budapest, Hungary — 4IKERBASQUE, Basque Foundation for Science, E-48013 Bilbao, Spain
We calculate precision bounds for estimating the gradient of the magnetic field based on the quantum Fisher information for various types of ensembles, such as for example, a single atomic ensemble with an arbitrary density profile, where the atoms cannot be addressed individually and which is a very relevant case for experiments.
We present a method to find spin states for gradient magnetometry with two spatially separated atomic ensembles based on states for sensing a global phase shift, such as the GHZ state or the Dicke state.
[1] I. Apellaniz et al., Phys. Rev. A, 97 053603 (2018)
[2] G. Vitagliano et al., arXiv:2104.05663 (2021)