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Single Qubit and Its Universal Logic Gate Made of a Heisenberg Spin Cluster with Five Particles |
| TAO Jun;WANG Shun-Jin |
| Center of Theoretical Physics, School of Physics and Technology, Sichuan University, Chengdu 610064 |
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| Cite this article: |
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TAO Jun, WANG Shun-Jin 2006 Chin. Phys. Lett. 23 3131-3134 |
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Abstract We investigate an anisotropic Heisenberg spin cluster with five particles controlled by a time-dependent magnetic field. With the algebraic dynamical method, we obtain the exact analytical solution to the time dependent Schrödinger equation. Based on the analytical solution, it is shown that the system can be used as a universal single qubit logic gate controlled by the strength and frequency of the magnetic field, and the six special single qubit logic gates can be realized physically. We also discuss the anti-decoherence property of the qubit and its logic gates resulted from particle coupling effect and collectivity of the cluster.
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| Keywords:
03. 65. Fd
03. 67. -a
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Published: 01 December 2006
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