摘要
We study an anisotropic spin cluster of 3 spin S=1/2 particles with antiferromagnetic exchange interactionwith non-uniform coupling constants.A time-dependent magnetic field is applied to control the time evolution of thecluster.It is well known that for an odd number of sites a spin cluster qubit can be defined in terms of the ground statedoublet.The universal one-qubit logic gate can be constructed from the time evolution operator of the non-autonomousmany-body system,and the six basic one-qubit gates can be realized by adjusting the applied time-dependent magneticfield.
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.
