A Non-Adiabatic Controlled Not Gate for the Kane Solid State Quantum Computer
C. Wellard, L. C. L. Hollenberg, H. C. Pauli
Abstract
The method of iterated resolvents is used to obtain an effective Hamiltonian for neighbouring qubits in the Kane solid state quantum computer. In contrast to the adiabatic gate processes inherent in the Kane proposal we show that free evolution of the qubit-qubit system, as generated by this effective Hamiltonian, combined with single qubit operations, is sufficient to produce a controlled-NOT (c-NOT) gate. Thus the usual set of universal gates can be obtained on the Kane quantum computer without the need for adiabatic switching of the controllable parameters as prescribed by Kane. Both the fidelity and gate time of this non-adiabatic c-NOT gate are determined by numerical simulation.
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