Adam Kaufman


Matteo joined the group in April 2022. He completed his Ph.D. thesis in the group of Jonathan Home at ETH Zurich, where he investigated the use of mixed-species chains of trapped ions to perform proof-of-principle experiments of quantum error correction and quantum computation. After his Ph.D., he worked at the newly founded ETH-PSI Quantum Computing Hub as the trapped-ion experimental lead scientist, where he conceived and led the construction of the first experimental setup.


Ting You joined the Regal-Kaufman cryo-lab after completing his undergrad studies at the National University of Singapore. His love for atomic physics developed after spending a year in the group of Professor Christian Kurtsiefer. After learning the ropes of AMO physics experiments, he joined the group of Assistant Professor Travis Nicholson. For his honors project, Ting You helped to build the first Magneto-optical trap of Indium. Ting You will now help to construct a cryogenic Rydberg atom array experiment, exploring new physics with excitement.


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!


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!


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.


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.