Perfect revivals of Rabi oscillations and hybrid Bell states in a trapped ion

Abstract

We show that perfect revivals of Rabi oscillations are possible, under certain conditions, in the population inversion of a trapped ion. Based on this property, we find that Schrödinger cat states of the atomic motion are naturally generated by the unitary dynamics. Using a pair of symmetric and antisymmetric Schrödinger cat states of the motion, together with an electronic excited or ground state, we find that the interaction leads to four orthonormal maximally entangled states of the two partitions, which we identify as Bell states. We also study a quadratic Kerr-type evolution that is possible for short interaction times.

9 pages, 7 figures

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• Long-lived mesoscopic entanglement outside the Lamb-Dicke regime
• Kochen-Specker theorem studied with neutron interferometer
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