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arXiv · 2305.09757

Robust Hamiltonian Engineering for Interacting Qudit Systems

Hengyun Zhou·Haoyang Gao·Nathaniel T. Leitao·Oksana Makarova·Iris Cong·Alexander M. Douglas·Leigh S. Martin·Mikhail D. Lukin
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Abstract

We develop a formalism for the robust dynamical decoupling and Hamiltonian engineering of strongly interacting qudit systems. Specifically, we present a geometric formalism that significantly simplifies qudit pulse sequence design, while incorporating the necessary robustness conditions. We experimentally demonstrate these techniques in a strongly-interacting, disordered ensemble of spin-1 nitrogen-vacancy centers, achieving over an order of magnitude improvement in coherence time over existing pulse sequences. We further describe how our techniques enable the engineering of exotic many-body phenomena such as quantum many-body scars, and allow enhanced sensitivities for quantum metrology. These results enable the engineering of a whole new class of complex qudit Hamiltonians, with wide-reaching applications in dynamical decoupling, many-body physics and quantum metrology.

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Hengyun Zhou, Haoyang Gao, Nathaniel T. Leitao, Oksana Makarova, Iris Cong, Alexander M. Douglas, Leigh S. Martin, Mikhail D. Lukin. 2023-05-16. Robust Hamiltonian Engineering for Interacting Qudit Systems. https://arxiv.org/abs/2305.09757

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