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Logical Qubit Research

Research into logical qubit operation and quantum error correction using neutral atom arrays.

Research Focus​

This research thrust investigates continuous quantum computation through programmable logical qubit arrays, demonstrating fault-tolerant operations and quantum error correction below threshold.

Selected Publications​

Logical quantum processor based on reconfigurable atom arrays​

Nature 626, 58-65 (2024)

D. Bluvstein, S. J. Evered, A. A. Geim, S. H. Li, H. Zhou, T. Manovitz, S. Ebadi, M. Cain, M. Kalinowski, D. Hangleiter, J. P. Bonilla Ataides, N. Maskara, I. Cong, X. Gao, P. Sales Rodriguez, T. Karolyshyn, G. Semeghini, M. J. Gullans, M. Greiner, V. Vuletic, M. D. Lukin

Demonstrates a reconfigurable atom array processor executing fault-tolerant algorithms, featuring 48 logical qubits, entanglement operations across logical qubit arrays, and error correction below threshold.

arXiv:2312.03982 | Nature

High-fidelity parallel entangling gates on a neutral atom quantum computer​

Nature 622, 268-272 (2023)

S. J. Evered, D. Bluvstein, M. Kalinowski, S. Ebadi, T. Manovitz, H. Zhou, S. H. Li, A. A. Geim, T. T. Wang, N. Maskara, H. Levine, G. Semeghini, M. Greiner, V. Vuletic, M. D. Lukin

Achieves two-qubit entangling gate fidelities exceeding 99.5% using optimized laser pulses and robust gate protocols in programmable neutral atom arrays.

arXiv:2304.05420 | Nature

A quantum processor based on coherent transport of entangled atom arrays​

Nature 604, 451-456 (2022)

D. Bluvstein, H. Levine, G. Semeghini, T. T. Wang, S. Ebadi, M. Kalinowski, A. Keesling, N. Maskara, H. Pichler, M. Greiner, V. Vuletic, M. D. Lukin

Introduces dynamic reconfiguration of entangled atom arrays through coherent transport, enabling universal quantum computation with neutral atoms.

arXiv:2112.03923 | Nature

Quantum phases of matter on a 256-atom programmable quantum simulator​

Nature 595, 227-232 (2021)

S. Ebadi, T. T. Wang, H. Levine, A. Keesling, G. Semeghini, A. Omran, D. Bluvstein, R. Samajdar, H. Pichler, W. W. Ho, S. Choi, S. Sachdev, M. Greiner, V. Vuletic, M. D. Lukin

Demonstrates programmable quantum simulation with 256 atoms, exploring exotic quantum phases and many-body dynamics.

arXiv:2012.12281 | Nature

Technical Background​

Neutral atom arrays trapped in optical tweezers provide a scalable platform for quantum computation. Rydberg interactions enable high-fidelity two-qubit gates, while coherent atom transport allows reconfigurable connectivity. These capabilities support fault-tolerant quantum error correction using surface codes and other topological codes.

Principal Investigator​

Mikhail Lukin (Harvard University) Lukin Group Website