Preparation of Dicke States in an Ion Chain

Published

November 2, 2009

Author(s)

David Hume, Chin-Wen Chou, Till P. Rosenband, David J. Wineland

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

Pub Type

Journals

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Keywords

atomic spectroscopy, Dicke state, entanglement, laser spectroscopy, ion trap, quantum information

Citation

Hume, D. , Chou, C. , Rosenband, T. and Wineland, D. (2009), Preparation of Dicke States in an Ion Chain, Physical Review A (Atomic, Molecular and Optical Physics), [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=903578 (Accessed October 10, 2025)