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Hamiltonian engineering of spin-orbit-coupled fermions in a Wannier-Stark optical lattice clock.

ABSTRACT: Engineering a Hamiltonian system with tunable interactions provides opportunities to optimize performance for quantum sensing and explore emerging phenomena of many-body systems. An optical lattice clock based on partially delocalized Wannier-Stark states in a gravity-tilted shallow lattice supports superior quantum coherence and adjustable interactions via spin-orbit coupling, thus presenting a powerful spin model realization. The relative strength of the on-site and off-site interactions can be tuned to achieve a zero density shift at a "magic" lattice depth. This mechanism, together with a large number of atoms, enables the demonstration of the most stable atomic clock while minimizing a key systematic uncertainty related to atomic density. Interactions can also be maximized by driving off-site Wannier-Stark transitions, realizing a ferromagnetic to paramagnetic dynamical phase transition.

SUBMITTER: Aeppli A

PROVIDER: S-EPMC9555777 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature

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Hamiltonian engineering of spin-orbit-coupled fermions in a Wannier-Stark optical lattice clock.

Aeppli Alexander A Chu Anjun A Bothwell Tobias T Kennedy Colin J CJ Kedar Dhruv D He Peiru P Rey Ana Maria AM Ye Jun J

Science advances 20221012 41

Engineering a Hamiltonian system with tunable interactions provides opportunities to optimize performance for quantum sensing and explore emerging phenomena of many-body systems. An optical lattice clock based on partially delocalized Wannier-Stark states in a gravity-tilted shallow lattice supports superior quantum coherence and adjustable interactions via spin-orbit coupling, thus presenting a powerful spin model realization. The relative strength of the on-site and off-site interactions can b ...[more]

PMID: 36223457

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