aqora

A Fermi-degenerate three-dimensional optical lattice clock

Ross B. Hutson, Sara Campbell, Edward Marti +5 more

Bulletin of the American Physical SocietyJun 7, 20171 citation

Probing many-body interactions in an optical lattice clock

A.M. Rey, Alexey Vyacheslavovich Gorshkov, C.V. Kraus +8 more

arXiv:1310.5248Annals of PhysicsNov 13, 201365 citations

Exploring spin-orbit coupling in a non-degenerate optical lattice clock.

Michael L. Wall, Andrew Koller, Shuming Li +1 more

Bulletin of the American Physical SocietyJun 10, 20150 citations

Coherent evolution of superexchange interaction in seconds-long optical clock spectroscopy

William R. Milner, Stefan Lannig, Mikhail Mamaev +7 more

Scaling up the performance of atomic clocks requires understanding complex many-body Hamiltonians to ensure meaningful gains for metrological applications. Here we use a degenerate Fermi gas loaded into a three-dimensional optical lattice to study the effect of a tunable Fermi-Hubbard Hamiltonian. The clock laser introduces a spin-orbit coupling spiral phase and breaks the isotropy of superexchange interactions, leading to XXZ-type spin anisotropy. By tuning the lattice confinement and applying imaging spectroscopy, we map out favorable atomic coherence regimes. We transition through various interaction regimes and observe coherent superexchange, tunable through on-site interaction and site-to-site energy shift, affecting the Ramsey fringe contrast over timescales >1 second. This study lays the groundwork for using a three-dimensional optical lattice clock to probe quantum magnetism and spin entanglement.Scaling up the performance of atomic clocks requires understanding complex many-body Hamiltonians to ensure meaningful gains for metrological applications. Here we use a degenerate Fermi gas loaded into a three-dimensional optical lattice to study the effect of a tunable Fermi-Hubbard Hamiltonian. The clock laser introduces a spin-orbit coupling spiral phase and breaks the isotropy of superexchange interactions, leading to XXZ-type spin anisotropy. By tuning the lattice confinement and applying imaging spectroscopy, we map out favorable atomic coherence regimes. We transition through various interaction regimes and observe coherent superexchange, tunable through on-site interaction and site-to-site energy shift, affecting the Ramsey fringe contrast over timescales >1 second. This study lays the groundwork for using a three-dimensional optical lattice clock to probe quantum magnetism and spin entanglement.

arXiv:2402.13398ScienceMay 1, 202511 citations

Effects of small-chain superexchange dynamics on spin-orbit-coupled clock spectroscopy

Mikhail Mamaev, Ana María Rey, William R. Milner

Optical lattice clocks have set records in clock precision and accuracy. Continuing to advance their performance, via probing as many atoms as possible for the longest interrogation time affordable, requires experimentally and theoretically studying a many-body lattice system. Motivated by recent experimental results on a Fermi-degenerate three-dimensional optical lattice clock [W. R. Milner et al., Science 388, 503 (2025)], we present a theoretical overview of Ramsey and Rabi spectroscopy in one-dimensional chains. At realistic experimental temperatures and confinement conditions, atoms are spatially localized into small chains of approximately one to five atoms. We show that in the presence of spin-orbit coupling induced by the clock laser, the spectroscopy observables are modified by superexchange interactions within each chain, and depend strongly on the length of the chain. The thermal distribution of chain lengths thus plays a key role in the spectroscopy measurements. Our results offer insight into observable many-body effects in state-of-the-art lattice clocks and suggest new directions for optimizing clock performance.Optical lattice clocks have set records in clock precision and accuracy. Continuing to advance their performance, via probing as many atoms as possible for the longest interrogation time affordable, requires experimentally and theoretically studying a many-body lattice system. Motivated by recent experimental results on a Fermi-degenerate three-dimensional optical lattice clock [W. R. Milner et al., Science 388, 503 (2025)], we present a theoretical overview of Ramsey and Rabi spectroscopy in one-dimensional chains. At realistic experimental temperatures and confinement conditions, atoms are spatially localized into small chains of approximately one to five atoms. We show that in the presence of spin-orbit coupling induced by the clock laser, the spectroscopy observables are modified by superexchange interactions within each chain, and depend strongly on the length of the chain. The thermal distribution of chain lengths thus plays a key role in the spectroscopy measurements. Our results offer insight into observable many-body effects in state-of-the-art lattice clocks and suggest new directions for optimizing clock performance.

arXiv:2507.11433Physical Review ANov 21, 20250 citations

Interacting fermions under spin-orbit coupling in an optical lattice clock

Sarah Bromley, Tobias Bothwell, Dhruv Kedar +4 more

Bulletin of the American Physical SocietyJun 8, 20170 citations

Few-body interactions in a Fermi degenerate optical lattice clock

Related papers

Few-body interactions in a Fermi degenerate optical lattice clock

Related papers