Entanglement distribution in star network based on spin chain in diamond |
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Authors: | Yuan-Ming Zhu Lei Ma |
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Institution: | College of Physics and Materials Science, East China Normal University, Shanghai 200241, China |
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Abstract: | After star network of spins was proposed, generating entanglement directly through spin interactions between distant parties became possible. We propose an architecture which involves coupled spin chains based on nitrogen-vacancy centers and nitrogen defect spins to expand star network. The numerical analysis shows that the maximally achievable entanglement exponentially decays with the length of spin chains M and spin noise. The entanglement capability of this configuration under the effect of disorder and spin loss is also studied. Moreover, it is shown that with this kind of architecture, star network of spins is feasible in measurement of magnetic-field gradient. |
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Keywords: | Entanglement distribution Star network Spin chain Nitrogen-vacancy centers |
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