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In a new Optica paper, Ye’s team, working with JILA electronic staff member Ivan Ryger and John "Jan" Hall, describe implementing a new approach for the PDH method, reducing RAM to never-before-seen minimal levels while simultaneously making the system more robust and simpler.

NIST Fellow and University of Colorado Boulder Physics professor Jun Ye, in collaboration with JILA and NIST Fellow James K. Thompson, has used a specific process known as spin squeezing to generate quantum entanglement, resulting in an enhancement in clock performance operating at the 10-17stability level. Their novel experimental setup, published in Nature Physics, also allowed the researchers to directly compare two independent spin-squeezed ensembles to understand this level of precision in time measurement, a level never before reached with a spin-squeezed optical lattice clock.

In an exciting turn for physics research, four major foundations have announced a collaborative funding effort for 11 pioneering "tabletop" experiments. The Gordon and Betty Moore Foundation, the Simons Foundation, the Alfred P. Sloan Foundation, and the John Templeton Foundation have come together, committing a total of $30 million. This unique initiative focuses on supporting experiments that, despite their relatively modest scale, are set to delve into areas often reserved for large-scale facilities.

Among the funded projects, each of which will receive up to five years of financial support, is a particularly notable experiment led by JILA and NIST Fellow Jun Ye and his research team. Known for his remarkable work in physics, Ye's project stands out for its ambition and innovative approach. The experiment involves the development of ultra-precise atomic clocks, which are expected to significantly advance our understanding of both quantum mechanics and general relativity.

Anjun Chu, a JILA graduate student, has been awarded the esteemed Boeing Quantum Creators Prize for 2023. This prestigious award, established by Boeing in 2021, celebrates early-career researchers who have significantly contributed to the advancement of quantum information science and engineering.

Chu, a member of the theory group led by JILA and NIST Fellow Ana Maria Rey, has distinguished himself through his groundbreaking research in quantum many-body dynamics. His work, focusing on spin systems and their multilevel extensions, has been vital in exploring quantum simulation and metrology in cutting-edge areas like optical lattice clocks and cavity QED systems.

In a new study published in Scientific Reports, JILA Fellow and University of Colorado Boulder physics professor Andreas Becker and his team theorized a new method to produce extreme ultraviolet (EUV) and x-ray light with elliptical polarization, a special shape in which the direction of light waves’ oscillation is changing. This method could provide experimentalists with a simple technique to generate such light, which is beneficial for physicists to further understand the interactions between electrons in materials on the quantum level, paving the way for designing better electronic devices such as circuit boards, solar panels, and more.

As reported in a new Science Advances paper, the JILA team and collaborators from universities in Sweden, Greece, and Germany probed the spin dynamics within a special material known as a Heusler compound: a mixture of metals that behaves like a single magnetic material. For this study, the researchers utilized a compound of cobalt, manganese, and gallium, which behaved as a conductor for electrons whose spins were aligned upwards and as an insulator for electrons whose spins were aligned downwards.

New research from JILA Fellow and University of Colorado Boulder physics professor Cindy Regal and her team, Dr. Ravid Shaniv and graduate student Chris Reetz has found that in specific scenarios, such as advanced studies looking at the interactions between light and mechanical objects, where the temperature might differ in various resonator parts, which lead to unexpected behaviors. Their observations, published in Physical Review Research, can potentially revolutionize the design of micro-mechanical resonators for quantum technology and precision sensing.

Every year, the Czech Science Foundation (GCAR) funds several JUNIOR STAR projects focused on new research areas and building powerful collaborative teams. These projects are awarded to early-career scientists coming to the Czech Republic from other countries or with significant international experience. Each project is awarded CZK 25 million over the following five years.
This year, JILA postdoctoral researcher Vít Svoboda is one of the 17 awardees in the 2023 JUNIOR STAR cohort.

U.S. President Joe Biden has awarded 232 Senior Executive Service (SES), Senior-Level (SL), and Scientific and Professional (ST) members across 31 government agencies with the prestigious Presidential Rank Award. Of these individuals, JILA and NIST Fellow Ana Maria Rey has been recognized within the Department of Commerce for her work in precision measurement and quantum physics.

In quantum information science, many particles can act as “bits,” from individual atoms to photons. At JILA, researchers utilize these bits as “qubits,” storing and processing quantum 1s or 0s through a unique system.

While many JILA Fellows focus on qubits found in nature, such as atoms and ions, JILA Associate Fellow and University of Colorado Boulder Assistant Professor of Physics Shuo Sun is taking a different approach by using “artificial atoms,” or semiconducting nanocrystals with unique electronic properties. By exploiting the atomic dynamics inside fabricated diamond crystals, physicists like Sun can produce a new type of qubit, known as a “solid-state qubit,” or an artificial atom.