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IEEE John Vincent Atanasoff International Symposium on Modern Computing (JVA)

Qubit Control on IBM's Quantum Computing Devices

Boyan T. Torosov, Nikolay V. Vitanov

Published Jul 5, 2023• 3 citations
Publisher

Abstract

In this work, we demonstrate how quantum control methods can be applied in cloud-based quantum computers. In particular, we demonstrate the use of composite pulses to perform robust population transfer, single-qubit gates, and reduction of leakage out of the computational subspace. The experiments have been performed on one of IBM's quantum computers, demonstrating excellent agreement with theoretical predictions.

DOI
10.1109/jva60410.2023.00017

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We present a robust pulse optimization method for adiabatic population transfer and adiabatic quantum computation. The approach relies on identifying control pulses that keep the evolving quantum system close to its instantaneous ground state. By combining advanced gradient-free optimization tools with specialized cost functions for adiabatic control, it achieves both efficiency and robustness. To demonstrate its generality, we apply the method to three examples involving both atomic and superconducting qubits. We test different optimization cost functions and discretization bases, showing that the approach outperforms ensemble optimization. Finally, to verify its performance on real quantum hardware, we implement digitized adiabatic qubit control using the optimized pulses on the IBM quantum cloud.