About Time
A Bug’s Life
Atoms, Atoms, Frozen Tight in the Crystals of the Light, What Immortal Hand or Eye Could Frame Thy Fearful Symmetry?
Invisible Rulers of Light
Sky Clocks and the World of Tomorrow

About the Ye Group

Jun YeOur group explores the frontier of light-matter interactions where novel atomic and molecular matterials are prepared in the quantum regime. We also control light fields that include both continuous waves and ulrashort pulses. Our experiments advance the fields of precision measurement, ultracold atoms and molecules, quantum metrology, as well as ultrafast science and quantum control. We are known for developing technologies in the areas of high-precision laser spectroscopy, atomic and molecular cooling and trapping, optical frequency metrology, quantum control, and ultrafast lasers. We apply these technologies for research in fundamental physics.
Read more -->

Research Areas

Our group explores many facets of ultracold strontium (Sr), emphasizing precision measurement and quantum state engineering and manipulation of atomic states. The group has achieved exquisite technical control via precision stabilization of lasers and the realization of ultracold atoms in optical lattices. Early on, we focused on precision measurements of Sr electronic transitions, which occur at optical frequencies, to explore the possibility of developing an optical atomic clock. This intense research effort has... Read more
Since 1999 and 2000, there has been a remarkable convergence of the fields of ultrafast optics, opti cal frequency metrology, and precision laser spectroscopy — a convergence that our lab was privileged to help facilitate. A remarkable transformation took place in these fields as unprecedented advances occurred in the control of optical phases ranging from the ultrashort (femtoseconds) to laboratory time scales (seconds). Today, a single-frequency continuous optical field can achieve a phase coherence time... Read more
Molecules cooled to ultralow temperatures provide fundamental new insights to molecular interaction dynamics in the quantum regime. In recent years, researchers from various scientific disciplines such as atomic, optical, and condensed matter physics, physical chemistry, and quantum science have started working together to explore many emergent research topics related to cold molecules, including cold chemistry, strongly correlated quantum systems, novel quantum phases, and precision... Read more

Ye Group News

Combing frequencies: NSF-funded center provides spectrum of new research, technology

Published: 06-23-2015 | Source: National Science Foundation

The World's Time

Published: 04-16-2015 | Source: American Physical Society

Three JILAns Win 2015 NSF Graduate Research Fellowships

Published: 04-01-2015 | Source: JILA Communications

New Clock May End Time As We Know It

Published: 11-03-2014 | Source: National Public Radio

Guinness World Records 2015 -Best Atomic Clock

Published: 09-21-2014 | Source: Guinness World Records 2015

Jun Ye & Debbie Jin named "Most Influential Scientific Minds 2014"

Published: 07-09-2014 | Source: The Ye Group