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Hannover 2013 – scientific programme

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A: Fachverband Atomphysik

A 3: Precision measurements and metrology I (with Q)

A 3.4: Talk

Monday, March 18, 2013, 12:00–12:15, F 128

Application of multipartite quantum states for gradient magnetometry — •Iñigo Urizar-Lanz1, Philipp Hyllus1, Iñigo Egusquiza1, Morgan Mitchell2, and Geza Toth1,3,41Theoretical Physics, University of the Basque Country UPV/EHU, E-48080 Bilbao, Spain — 2Institute of Photonic Sciences, ICFO, Mediterranean Technology Park, Barcelona, Spain — 3IKERBASQUE, Basque Foundation for Science, E-48011 Bilbao, Spain — 4Wigner Research Centre for Physics, H-1525 Budapest, Hungary

Singlet states are states with vanishing angular momentum. We investigate the possibilities of these states for measuring the gradient of a magnetic field. This kind of magnetometry is invariant under a homogeneous magnetic field. We calculate the precision of the measurement for this type of states, as well as for other states that are not invariant under homogeneous fields. We also consider the case of spins larger than 1/2 and the effect of noise.

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