Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Preparation of Dicke States in an Ion Chain



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


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.
Physical Review A (Atomic, Molecular and Optical Physics)


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


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], (Accessed February 27, 2024)
Created November 2, 2009, Updated February 19, 2017