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Superconducting Qubits

Fast Microwave-free State Preparation and Measurement of Superconducting Qubits

arXiv
Authors: R. Abraham, F. Amet, P. Anderson, M. Arrigo, J. Arteaga, C. J. Ballard, C. Barker, T. Barnes, P. Bechman, R. Bhatt, K. Blaine, T. M. Borman, J. Botimer, G. R. Boyd, P. Bradley, A. D. Brandon, T. K. Bristol, A. Bulkos, R. M. Burnett, D. Burrowes, D. N. Cakan, N. Carniero, T. Chamberlin, D. Chen, M. Chilcote, B. G. Christensen, I. Christie, J. Clark, D. Clarke, J. M. Cochran, J. C. Collini, K. Connolly, G. Costa, D. Cowger, B. Dalfort, D. Davies, S. Deitemeyer, N. DeNigris, F. Densmore, S. J. Di Giacomo, S. G. Diamond, R. DiCiro, S. M. Disseler, K. Dixon, J. Donnelly, E. Donohue, M. Downing, B. Eastin, N. Edwards, M. Ehsani, S. Ellis, R. Epstein, D. Ferguson, P. Fischer, S. Friedensen, D. Gabriel, M. A. Gettelman, A. Gillam, G. Gilmore, J. Goode, E. Goodwin, M. Gottschalk, A. L. Graninger, T. Graves-Abe, J. Hackley, N. Hartman, B. Heacock, B. Heischmidt, P. Helms, R. Hinkey, B. Hong, S. T. Howard, D. Jensen, N. Johns, D. R. Johnson, J. Johnson, H. Kaplan, Z. Keane, S. Keebaugh, C. Kegerreis, K. Kelcourse-Oquendo, M. S. Khalil, D. Killeen, A. S. Knutson, T. Kohler, M. Kornecki, F. Koutsouli, A. Krick, K. L. Krycka, J. Kuan, D. Lad, J. R. Lane, N. J. Laurita, A. C. Lee, A. R. Lemmon, E. M. Leonard, L. M. D. Leonard, J. Leventis, M. P. Lilly, A. Lisewski, L. Llano, M. Longo, C. Lostoski, Z. Lou, M. G. Loving, D. al Ludwig, N. Luhrs, J. L. Lund, K. A. Maddock, R. J. Magyar, K. Mahmud, T. A. Manning, A. I. Marakov, A. D. McCreary, P. F. McLaughlin, J. R. Medford, E. Metz, A. L. Middleton, A. Miklich, R. Miller, J. Mlack, M. Mucci, N. Mungo, T. Murphy, R. E. Murray, O. Naaman, J. Nakamura, M. Noevere, S. Novikov, M. E. Nowakowski, C. Nunez, K. N. Ogg, B. Oshokoya, D. Paz, A. Pesetski, T. Pillsbury, C. Pinion, A. D. Pitcock, A. J. Przybysz, P. Quarterman, D. Queen, I. Ramos, S. L. Reed, D. Reitz, M. Rennie, S. Reza, B. Richman, K. H. Rigdon, C. Rotella, M. Rudolph, E. Sadler, T. Safford, D. Saha, A. E. Saia, D. I. Santiago, R. Schwartz, A. Schwarzkopf, M. Scott-Jones, S. L. Sendelbach, S. J. Shapiro, A. N. Sharma, M. E. Sherwin, A. Sierakowski, J. N. Sills, R. Simha, N. Siwak, J. Smith, C. Snyder, H. Solomon, N. S. Sperlein, L. St. Marie, K. Stalpes, S. F. Steers, Z. Stegen, R. M. Stein, T. I. Stephenson, M. Stoutimore, J. D. Strand, J. A. Strong, E. Swain, S. Swami, A. Tamang, I. Thompson, A. B. Tokarchik, N. Tralshawala, D. Tran, S. Tyler, L. Upton, G. Van Dyke, J. Vannucci, K. Vempati, J. S. Vogel, R. Vyas, M. Wagner, P. Warner, N. Washington, B. Way, M. A. Wayne, D. Wehella-Gamage, M. E. Weippert, T. Weitzel, J. Wenner, L. White, S. Whitsitt, A. Wilkinson, R. Willey, I. Yandow, J. Yang, L. Yu, F. Yumiceva, V. Zheng, R. Zimmerman, C. Zinn, J. Ziskind

Year

2026

Paper ID

76124

Status

Preprint

Abstract Read

~2 min

Abstract Words

113

Citations

N/A

Abstract

Fast, high-fidelity, scalable state preparation and measurement is critical to the realization of a quantum computing system. The state-of-the-art methods for preparation and readout of superconducting qubits require finely tuned microwave signals and 100 ns of measurement time, which are major obstacles to the scalability and performance of superconducting quantum computers. Here, we have demonstrated novel, microwave-free methods for both preparation and readout of superconducting qubits with >99% fidelity in only 10 ns for either operation while maintaining qubit coherence. This technology is compatible with scalable superconducting digital control systems, and using quantum flux parametrons for amplification, we demonstrated full quantum-to-digital conversion in only 15 ns, which is an order of magnitude faster than state-of-the-art microwave-based techniques.

Why This Paper Matters

  • This paper contributes to the Superconducting Qubits research area in the Quantum Articles archive.
  • It adds a 2026 reference point for readers tracking recent quantum research.
  • Fast, high-fidelity, scalable state preparation and measurement is critical to the realization of a quantum computing system.

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