Adam Kaufman

Mcgrew

Will joined the lab in October of 2021, as an NRC postdoctoral fellow, after completing his doctoral studies on the ytterbium optical lattice clock experiment of Andrew Ludlow. In the Ludlow lab, he worked to characterize and improve the performance of the optical clock system, ultimately attaining performance at the level of a few parts in a quintillion in the metrics of systematic uncertainty, measurement instability, and reproducibility.

Our paper on tweezer-programmable lattices is up!

Teaser

In January, we posted our first demonstration of a new concept for tweezer-programmable optical lattices. Using tweezers with spatial scale on the order of 400 nm, we can program the dynamics and Hamiltonian with single lattice site resolution. We use resolved-sideband cooling to prepare the atoms at extremely low temperatures. From these conditions, we demonstrate for the first time the implementation of a spatial search algorithm originally proposed by Childs and Goldstone. Andrew Childs collaborated with us on this project, and we expect interesting extensions down the line to multi-particle search algorithms.   

New papers up!

Teaser

In the past month, the group has put up two new preprints. 

- In the strontium experiment, we report the generation of entangled Bell states, prepared in optical clock qubits, whose phase coherence persists for more than 4 seconds. This uses a gate scheme proposed by M. Martin and I. Deutsch, based on Rydberg-mediated interactions. See the preprint here.

- On the Ytterbium experiment, we report our first results preparing, controlling, and detecting arrays of nuclear spin qubits of 171Yb. We observe high fidelity control with sub-microsecond pulse times. We also demonstrate low-entropy array preparation through deterministic loading techniques via the use of narrow-line transitions and Raman-sideband cooling to near the motional ground state. See the preprint here.

Senoo

Although “Aruku” means “walking” in Japanese, Aruku keeps running to pursue further understanding and harnessing the quantum mechanical world. In this way, he found his passion for Atomic, Molecular, and Optical Physics (AMO) in the Takahashi laboratory at Kyoto University, Japan, where he accumulated AMO and laser experiences. While he visited the University of Washington as an exchange student, he developed a ULE cavity system for the Ytterbium clock transition laser in the Gupta group. After coming back to Kyoto in 2020, he did theoretical research relating to cold atoms.

Norcia

Matt joined the lab as a National Research Council (NRC) Postdoctoral Fellow after completing a PhD in James Thompson’s lab at JILA.  Matt’s thesis, titled “New tools for precision measurement and quantum science with narrow linewidth optical transitions” focused on coupling a large ensemble of strontium atoms to an optical cavity via narrow and ultra-narrow linewidth optical transitions.  A key outcome of this work was the first demonstration and characterization of superradiance from the 1 mHz linewidth strontium clock transition, which holds promise as a future high-precision o

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