Anisotropic Spin Cluster as a Qubit |
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Authors: | YAN Xiao-Bo and WANG Ming-Ji |
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Institution: | Electronic Science Institute, Daqing Petroleum Institute, Daqing 163318, China |
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Abstract: | We study an anisotropic spin cluster of 3 spin S=1/2 particles with antiferromagnetic exchange interaction with non-uniform coupling constants. A time-dependent magnetic field is
applied to control the time evolution of the cluster. It is well known that for an odd number of sites a spin cluster qubit can be defined in terms of the ground state doublet. The universal one-qubit logic gate can be constructed from the time evolution
operator of the non-autonomous many-body system, and the six basic
one-qubit gates can be realized by adjusting the applied
time-dependent magnetic field. |
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Keywords: | algebraic dynamics anisotropic spin cluster universal one-qubit logic gate |
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