Metrology and many-body physics with strontium in a 2D tweezer array
Abstract
Arrays of neutral atoms trapped in optical tweezers are a powerful platform for single-particle-controlled quantum gas assembly, entanglement generation, and many-body physics. Alkaline-earth atoms, such as strontium, offer a rich singlet-triplet electronic structure which enhances the capabilities of tweezer arrays--principally via high-fidelity low-loss imaging and ultra-narrow `clock' transitions with direct applications in metrology and quantum information science. Indeed, our tweezer array clock establishes a new, state-of-the-art platform for comparisons of atomic ensembles' clock frequencies. Now, we are working to introduce off-resonant Rydberg excitation--Rydberg dressing--of the clock state introduces strong long-range interactions between atoms in a low-entropy two-dimensional array. The resulting transverse field Ising Hamiltonian enables spin-squeezing on the clock transition, leveraging quantum entanglement for improved metrological sensitivity. This also offers a rich many-body system in which entanglement may propagate beyond the range of the underlying interactions. These goals demonstrate the power and versatility of combining controllable long-range interactions with single particle manipulation of highly coherent quantum systems.
Supported by ARO, AFOSR, DARPA, and NSF Physics Frontier Center at JILA, and NIST. N.S. and M.N. acknowledge support from the NIST NRC Postdoctoral research associateship program.- Publication:
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APS Division of Atomic, Molecular and Optical Physics Meeting Abstracts
- Pub Date:
- 2020
- Bibcode:
- 2020APS..DMPE01082S