High Fidelity Adiabatic Quantum Computation via Dynamical Decoupling

Abstract

We introduce high-order dynamical decoupling strategies for open system adiabatic quantum computation. Our numerical results demonstrate that a judicious choice of high-order dynamical decoupling method, in conjunction with an encoding which allows computation to proceed alongside decoupling, can dramatically enhance the fidelity of adiabatic quantum computation in spite of decoherence.

5 pages, 4 figures

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• Error suppression and error correction in adiabatic quantum computation I: techniques and challenges
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• Error suppression and error correction in adiabatic quantum computation II: non-equilibrium dynamics
• Quantum annealing correction at finite temperature: ferromagnetic $p$-spin models
• Performance of two different quantum annealing correction codes
• An energetic perspective on rapid quenches in quantum annealing
• Mean Field Analysis of Quantum Annealing Correction
• Eigenstate Tracking in Open Quantum Systems
• Schedule path optimization for quantum annealing and adiabatic quantum computing
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• Arbitrary-time error suppression for Markovian adiabatic quantum computing using stabilizer subspace codes
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• Quantum annealing with a nonvanishing final value of the transverse field
• Using copies to improve precision in continuous-time quantum computing
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• Demonstration of High-Fidelity Entangled Logical Qubits using Transmons
• Robust Spin Polarization by Adiabatic Dynamical Decoupling