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  • Letter
  • Open Access

Robust and parallel control of many qubits

Wenjie Gong* and Soonwon Choi

  • *Contact author: wgong@mit.edu
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Phys. Rev. Research 8, L032043 – Published 14 September, 2026

DOI: https://doi.org/10.1103/n2hz-8zy2

Abstract

The rapid growth in size of quantum devices demands efficient ways to control them, which is challenging for systems with thousands of qubits or more. Here, we present a simple yet powerful solution: robust, site-dependent control of an arbitrary number of qubits in parallel with only minimal local tunability of the driving field. Inspired by recent experimental advances, we consider access to only one of three constrained local control capabilities: local control of either the phase or amplitude of the beam at each qubit, or individual Z rotations. In each case, we devise parallelizable composite pulse sequences to realize arbitrary single-qubit unitaries robust against quasistatic amplitude and frequency fluctuations. Numerical demonstration shows that our approach outperforms existing sequences such as BB1 and CORPSE in almost all regimes considered, achieving average fidelity >0.999 under a decoherence rate of ∼10−5, even with a few percent amplitude and frequency error. Our results indicate that even for very large qubit ensembles, accurate, individual manipulation can be achieved despite substantial control inhomogeneity.

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Phys. Rev. Research 8, L032043– Published 14 September, 2026
  • Received 20 December 2023
  • Revised 15 March 2026
  • Accepted 22 June 2026
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