Journal
PHYSICS LETTERS A
Volume 331, Issue 3-4, Pages 164-169Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2004.08.019
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We study entanglement and spin squeezing in the ground state of three qubits interacting via the transverse Ising model. We give analytical results for the entanglement and spin squeezing, and a quantitative relation between the concurrence, quantifying the entanglement of two spins, and the spin squeezing parameter, measuring the degree of squeezing. Finally, by appropriately choosing the exchange interaction and strengths of the transverse field, we propose a scheme for generating entangled W state from an unentangled initial state with all spins down. (C) 2004 Elsevier B.V. All rights reserved.
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