Fast Non-Adiabatic Two Qubit Gates for the Kane Quantum Computer

Abstract

In this paper we apply the canonical decomposition of two qubit unitaries to find pulse schemes to control the proposed Kane quantum computer. We explicitly find pulse sequences for the CNOT, swap, square root of swap and controlled Z rotations. We analyze the speed and fidelity of these gates, both of which compare favorably to existing schemes. The pulse sequences presented in this paper are theoretically faster, higher fidelity, and simpler than existing schemes. Any two qubit gate may be easily found and implemented using similar pulse sequences. Numerical simulation is used to verify the accuracy of each pulse scheme.

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• Interaction cost of non-local gates
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• Geometric phase gate for entangling two Bose-Einstein condensates
• Universal Dephasing Control During Quantum Computation
• Simulating Hamiltonian dynamics using many-qudit Hamiltonians and local unitary control
• Optimal control of the silicon-based donor electron spin quantum computing
• Molecular orbital calculations of two-electron states for P donor solid-state spin qubits
• Towards Large-Scale Quantum Computation
• Gates for the Kane Quantum Computer in the Presence of Dephasing
• Deterministic preparation of Dicke states of donor nuclear spins in silicon by cooperative pumping
• Dynamics of a driven spin coupled to an antiferromagnetic spin bath
• Potential Errors in a Scheme of Universal Quantum Gates in Kane's Model