High Fidelity Single Qubit Operations using Pulsed EPR

Abstract

Systematic errors in spin rotation operations using simple RF pulses place severe limitations on the usefulness of the pulsed magnetic resonance methods in quantum computing applications. In particular, the fidelity of quantum logic operations performed on electron spin qubits falls well below the threshold for the application of quantum algorithms. Using three independent techniques, we demonstrate the use of composite pulses to improve this fidelity by several orders of magnitude. The observed high-fidelity operations are limited by pulse phase errors, but nevertheless fall within the limits required for the application of quantum error correction.

4 pages, 3 figures To appear in Phys. Rev. Lett

References in corpus (6)

• Overhead and noise threshold of fault-tolerant quantum error correction
• Tackling Systematic Errors in Quantum Logic Gates with Composite Rotations
• Arbitrarily accurate composite pulses
• NMR-like control of a quantum bit superconducting circuit
• Measuring errors in single qubit rotations by pulsed electron paramagnetic resonance
• A new mechanism for electron spin echo envelope modulation

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