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APS » Journals » Phys. Rev. B » Volume 75 » Issue 11
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Phys. Rev. B 75, 115307 (2007) [12 pages]

Disentanglement and decoherence in two-spin and three-spin systems under dephasing

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Kevin Ann*
Department of Physics, Boston University, Boston, Massachusetts 02215, USA

Gregg Jaeger†
Quantum Imaging Lab, Department of Electrical and Computer Engineering, and Division of Natural Sciences, Boston University, Boston, Massachusetts 02215, USA

Received 9 November 2006; published 9 March 2007

We compare disentanglement and decoherence rates within two-spin and three-spin entangled systems subjected to all possible combinations of local and collective pure dephasing noise combinations. In all cases, the bipartite entanglement decay rate is found to be greater than or equal to the dephasing-decoherence rates and often significantly greater. This sharpens previous results for two-spin systems [ T. Yu and J. H. Ebenly Phys. Rev. B 68 165322 (2003)] and extends them to the three-spin context.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.75.115307
DOI:
10.1103/PhysRevB.75.115307
PACS:
03.65.Yz, 03.65.Ta

*Electronic address: kevinann@bu.edu

†Electronic address: jaeger@bu.edu

 
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