Average entanglement of spin 1 and 1/2 pair

• Authors: Guo-Qiang Zhu
• Languages of publication: EN

Abstracts

EN

We study the entanglement features of the ground state of a system composed of spin 1 and 1/2 parts. In the light of the ground state degeneracy, the notion of average entanglement is used to measure the entanglement of the Hilbert subspace. The entanglement properties of both a general superposition as well as the mixture of the degenerate ground states are discussed by means of average entanglement and the negativity respectively.

Keywords

EN

entanglement; spin models

Discipline

• 03.67.Mn: Entanglement measures, witnesses, and other characterizations(see also 03.65.Ud Entanglement and quantum nonlocality; 42.50.Dv Quantum state engineering and measurements in quantum optics)
• 03.65.Ud: Entanglement and quantum nonlocality (e.g. EPR paradox, Bell's inequalities, GHZ states, etc.)(for entanglement production and manipulation, see 03.67.Bg; for entanglement measures, witnesses etc., see 03.67.Mn; for entanglement in Bose-Einstein condensates, see 03.75.Gg)
• 75.10.Jm: Quantized spin models, including quantum spin frustration

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2009
• Volume: 7
• Issue: 1
• Pages: 135-140

Dates

published

1 - 3 - 2009

online

8 - 1 - 2009

Contributors

author

Guo-Qiang Zhu

• Laboratory for Quantum Information and Department of Applied Physics, China Jiliang University, Xiasha College Park, Hangzhou, 310018, P.R. China

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Identifiers

DOI

10.2478/s11534-008-0129-7