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Neutral atoms in optical tweezers as messenger qubits for scaling up a trapped ion quantum computer

Svetlana Kotochigova

Subhadeep Gupta and Boris B. Blinov

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Phys. Rev. Research 7, 033212 – Published 2 September, 2025

DOI: https://doi.org/10.1103/pvn4-ct5m

Abstract

We propose to combine neutral atom and trapped ion qubits in one scalable modular architecture that uses shuttling of individual neutral atoms in optical tweezers to realize atomic interconnects between trapped ion quantum registers. These interconnects are deterministic, and thus may be performed on-demand. The proposed protocol is as follows: A tweezer-trapped neutral atom qubit is brought close to a trapped ion in an ion chain serving as a module of a larger quantum computer, and an entangling gate is performed between the two qubits. Then, the neutral atom is quickly moved to another, nearby trapped ion chain in the same modular ion trap and entangled with an ion in that chain, thus entangling the two separate ion chains. The optical dipole potential of the tweezer beam for the neutral atom does not measurably affect the trapped ions, while the rf ion trap does not affect the neutral atom. With realistic tweezer trap parameters, the neutral atom can be moved over millimeter-scale distance in a few tens of microseconds, thus enabling a remote entanglement generation rate of over 103s−1 even with very modest assumptions for the atom-ion quantum gate speed, and possibly up to 104s−1, which is two orders of magnitude higher than the current state-of-the-art with photonic interconnects.

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References (27)

  1. C. Monroe, R. Raussendorf, A. Ruthven, K. R. Brown, P. Maunz, L.-M. Duan, and J. Kim, Large-scale modular quantum-computer architecture with atomic memory and photonic interconnects, Phys. Rev. A 89, 022317 (2014).
  2. D. Kielpinski, C. Monroe, and D. J. Wineland, Architecture for a large-scale ion-trap quantum computer, Nature (London) 417, 709 (2002).
  3. S.-A. Guo, Y.-K. Wu, J. Ye, L. Zhang, W.-Q. Lian, R. Yao, Y. Wang, R.-Y. Yan, Y.-J. Yi, Y.-L. Xu, B.-W. Li, Y.-H. Hou, Y.-Z. Xu, W.-X. Guo, C. Zhang, B.-X. Qi, Z.-C. Zhou, He L., and L.-M. Duan, A site-resolved two-dimensional quantum simulator with hundreds of trapped ions, Nature (London) 630, 613 (2024).
  4. F. Mintert and C. Wunderlich, Ion-trap quantum logic using long-wavelength radiation, Phys. Rev. Lett. 87, 257904 (2001).
  5. J. M. Pino, J. M. Dreiling, C. Figgatt, J. P. Gaebler, S. A. Moses, M. S. Allman, C. H. Baldwin, M. Foss-Feig, D. Hayes, K. Mayer, C. Ryan-Anderson, and B. Neyenhuis, Demonstration of the trapped-ion quantum CCD computer architecture, Nature (London) 592, 209 (2021).
  6. D. Bluvstein, H. Levine, G. Semeghini, T. T. Wang, S. Ebadi, M. Kalinowski, A. Keesling, N. Maskara, H. Pichler, M. Greiner, V. Vuletić, and M. D. Lukin, A quantum processor based on coherent transport of entangled atom arrays, Nature (London) 604, 451 (2022).
  7. I. S. Madjarov, J. P. Covey, A. L. Shaw, J. Choi, A. Kale, A. Cooper, H. Pichler, V. Schkolnik, J. R. Williams, and M. Endres, High-fidelity entanglement and detection of alkaline-earth Rydberg atoms, Nat. Phys. 16, 857 (2020).
  8. T. M. Graham, L. Phuttitarn, R. Chinnarasu, Y. Song, C. Poole, K. Jooya, J. Scott, A. Scott, P. Eichler, and M. Saffman, Midcircuit measurements on a single-species neutral alkali atom quantum processor, Phys. Rev. X 13, 041051 (2023).
  9. H. J. Manetsch, G. Nomura, E. Bataille, K. H. Leung, X. Lv, and M. Endres, A tweezer array with 6100 highly coherent atomic qubits, arXiv:2403.1202.
  10. K. N. Blodgett, D. Peana, S. S. Phatak, L. M. Terry, M. P. Montes, and J. D. Hood, Imaging a6Li atom in an optical tweezer 2000 times with λ-enhanced gray molasses, Phys. Rev. Lett. 131, 083001 (2023).
  11. G. Premawardhana, J. Kunjummen1, S. Subhankar, and J. M. Taylor, Feasibility of a trapped atom interferometer with accelerating optical traps, Phys. Rev. A 109, 053316 (2024).
  12. S. Y. Kang, M. Duocastella, and C. B. Arnold, Variable optical elements for fast focus control, Nat. Photon. 14, 533 (2020).
  13. A. Mermillod-Blondin, E. McLeod, and C. B. Arnold, High-speed varifocal imaging with a tunable acoustic gradient index of refraction lens, Opt. Lett. 33, 2146 (2008).
  14. H. Doerk, Z. Idziaszek, and T. Calarco, Atom-ion quantum gate, Phys. Rev. A 81, 012708 (2010).
  15. M. Saffman, T. G. Walker, and K. Mølmer, Quantum information with Rydberg atoms, Rev. Mod. Phys. 82, 2313 (2010).
  16. H. Levine, A. Keesling, G. Semeghini, A. Omran, T. T. Wang, S. Ebadi, H. Bernien, M. Greiner, V. Vuletić, H. Pichler, and M. D. Lukin, Parallel implementation of high-fidelity multiqubit gates with neutral atoms, Phys. Rev. Lett. 123, 170503 (2019).
  17. C. Zhang, F. Pokorny, W. Li, G. Higgins, A. Poschl, I. Lesanovsky, and M. Hennrich, Submicrosecond entangling gate between trapped ions via Rydberg interaction, Nature (London) 580, 345 (2020).
  18. P. Weckesser, F. Thielemann, D. Wiater, A. Wojciechowska, L. Karpa, K. Jachymski, M. Tomza, T. Walker, and T. Schaetz, Observation of Feshbach resonances between a single ion and ultracold atoms, Nature (London) 600, 429 (2021).
  19. A. Kramida, Yu. R., J. Reader, and NIST ASD team, NIST atomic spectra database (Ver. 5.12) (National Institute of Standards and Technology, Gaithersburg, MD, 2024), https://physics.nist.gov/asd.
  20. J. O’Reilly, G. Toh, I. Goetting, S. Saha, M. Shalaev, A. L. Carter, A. Risinger, A. Kalakuntla, T. Li, A. Verma, and C. Monroe, Fast photon-mediated entanglement of continuously cooled trapped ions for quantum networking, Phys. Rev. Lett. 133, 090802 (2024).
  21. E. Tiesinga, J. Kłos, and S. Kotochigova (unpublished).
  22. P. Scholl, M. Schuler, H. J. Williams, A. A. Eberharter, D. Barredo, K.-N. Schymik, V. Lienhard, L.-P. Henry, T. C. Lang, T. Lahaye, A. M. Läuchli, and A. Browaeys, Quantum simulation of 2D antiferromagnets with hundreds of Rydberg atoms, Nature (London) 595, 233 (2021).
  23. T. M. Graham, Y. Song, J. Scott, A. Poole, C. L. Phuttitarn, K. Jooya, P. Eichler, X. Jiang, A. Marra, B. Grinkemeyer, M. Kwon, M. Ebert, J. Cherek, M. T. Lichtman, M. Gillette, J. Gilbert, D. Bowman, T. Ballance, C. Campbell, E. D. Dahl et al., Multi-qubit entanglement and algorithms on a neutral-atom quantum computer, Nature (London) 604, 457 (2022).
  24. S. Anand, C. E. Bradley, R. White, K. Ramesh, V. Singh, and H. Bernien, A dual-species Rydberg array, Nat. Phys. 20, 1744 (2024).
  25. V. S. Lebedev and I. L. Beigman, Physics of Highly Excited Atoms and Ions (Springer, Berlin, 1998).
  26. R. G. Hulet and D. Kleppner, Rydberg atoms in “circular” states, Phys. Rev. Lett. 51, 1430 (1983).
  27. M. R. Dietrich, N. Kurz, T. Noel, G. Shu, and B. B. Blinov, Hyperfine and optical barium ion qubits, Phys. Rev. A 81, 052328 (2010).

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Phys. Rev. Research 7, 033212– Published 2 September, 2025
  • Received 8 January 2025
  • Accepted 25 July 2025
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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