2012/12/04 by G. Hétet, L. Slodička, Hétet, G. +5
Physics and Astronomy · #Atomic Physics (physics.atom-ph) #FOS: Physical sciences #Quantum Physics (quant-ph) #physics.atom-ph #quant-ph
paper · pdf · doi:10.48550/arxiv.1212.0810
Added references. Modified figure 4
arxiv created 2012/12/19 · arxiv updated 2012/12/20
Faraday rotation of a laser field induced by a single atom is demonstrated by tightly focussing a linearly polarized laser beam onto a laser-cooled ion held in a harmonic Paul trap. The polarization rotation signal is further used to measure the phase-shift associated with electromagnetically-induced-transparency and to demonstrate read-out of the internal state on the qubit transition with a detection fidelity of 98 ± 1%. These results have direct implications for single atom magnetometery and dispersive read-out of atomic superpositions.