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Publication Citation: Preparation of Dicke States in an Ion Chain

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Author(s): David Hume; Chin W. Chou; Till P. Rosenband; David J. Wineland;
Title: Preparation of Dicke States in an Ion Chain
Published: November 02, 2009
Abstract: We have investigated theoretically and experimentally a method for preparing Dicke states in trapped atomic ions. We consider a linear chain of N ion qubits that is prepared in a particular Fock state of motion, jmi. The m phonons are removed by applying a laser pulse globally to the N qubits, and converting the motional excitation to m flipped spins. The global nature of this pulse ensures the m °ipped spins are shared by all the target ions in a state that is a close approximation to the Dicke state jD(m)N i. We calculate numerically the ¯delity limits of the protocol and ¯nd smalldeviations from the ideal state for m = 1 and m = 2. We have demonstrated the basic features of this protocol by preparing the state jD(1)2 i in two 25Mg+ target ions trapped simultaneously with an 27Al+ ancillary ion.
Citation: Physical Review A (Atomic, Molecular and Optical Physics)
Volume: 80
Pages: 5 pp.
Keywords: atomic spectroscopy;Dicke state;entanglement;laser spectroscopy;ion trap;quantum information
Research Areas: Physics, Laser Physics, Quantum Information
PDF version: PDF Document Click here to retrieve PDF version of paper (107KB)