The Morris Loeb Lecture in Physics: Jun Ye

October 17, 2018

The lectures, sponsored by the Morris Loeb Lectureship Fund, are free and open to the public.


Fellow, JILA: Fellow, National Institute of Standards and Technology; Professor Adjoint, Department of Physics, University of Colorado

Quantum Matter and Atomic Clocks (MP4)

Monday, October 22, 2018 @ 4:15pm
Jefferson 250, 17 Oxford Street, Cambridge

Precise quantum state engineering of individual atoms has led to the unprecedented measurement performance for time and frequency. The use of many atoms enhances the counting statistics, and it also provides new opportunities for understanding and constructing quantum matter to enhance measurement accuracy. At the core of the new JILA three-dimensional optical lattice clock is a quantum gas of fermionic atoms that are spatially correlated to guard against motional and collisional effects. The convolution of precision control of light and matter is helping bridge different disciplines in physics and fostering new capabilities to probe fundamental and emerging phenomena.

Frequency Comb Spectroscopy – from mid-IR to XUV (MP4)

Tuesday, October 23, 2018 @ 4:30pm
Jefferson 250, 17 Oxford Street, Cambridge

Studies of light and its interaction with matter have been a key driving force for many scientific and technological breakthroughs, including the invention of laser and the creation of cold atomic matter. The unprecedented phase coherence of modern stable lasers can be transferred across the entire visible spectrum via an optical frequency comb, which provides revolutionary synergy between precision measurement and ultrafast science. A good example is the recently developed direct frequency comb spectroscopy, permitting simultaneous measurements of tens of thousands of molecular spectral features that form the basis for molecular identification at an unprecedented level of specificity. Frequency combs have now been extended into the mid infrared and extreme ultraviolet. The capability of performing time-resolved absorption enables quantitative track of transient chemical species and study of reaction kinetics in real time. Combined with the technology of cold molecules, we can unravel complex spectra from large molecules and obtain new insights to molecular structure and dynamics. Finally, with an XUV frequency comb we can directly manipulate molecules and probe the extreme nonlinear physics, opening future high-precision measurements in strong-field phenomena.

Cold Molecules – a New Playground for Quantum and Chemical Physics (MP4)

Wednesday, October 24, 2018 @ 4:30pm
Jefferson 250, 17 Oxford Street, Cambridge

Molecular interactions control everything from making new materials to generation of energy. However, complex molecular structure has challenged accurate study and precise control of their interactions at the most fundamental levels. A new scientific frontier is emerging in recent years by cooling molecules to ultralow temperatures, providing microscopic insights to how molecules interact in the quantum regime. With a quantum gas of molecules, their interactions can be precisely manipulated via spatial confinement and orientations based on specific quantum states, and their reactions can be influenced by quantum statistics and degeneracy. The long-range dipolar interaction between optically trapped molecules presents an interconnected spin system where correlated many-body dynamics can be explored.

Jun Ye is a Fellow of JILA and a Fellow of NIST. He is a member of the National Academy of Sciences, a Fellow of the American Physical Society, and a Fellow of the Optical Society of America. His research focuses on the frontiers of light-matter interactions and includes precision measurement, quantum physics and ultracold matter, optical frequency metrology, and ultrafast science. He has co-authored over 300 scientific papers and has delivered over 500 invited talks. Awards and honors include N.F. Ramsey Prize (APS), Rabi Award (IEEE), US Presidential Rank (Distinguished) Award, three Gold Medals from the U.S. Commerce Department, Foreign Member of the Chinese Academy of Sciences, Frew Fellow of the Australian Academy of Science, I.I. Rabi Prize (APS), European Frequency and Time Forum Award, Carl Zeiss Research Award, William F. Meggers Award and Adolph Lomb Medal from the Optical Society of America, Arthur S. Flemming Award, Presidential Early Career Award, Friedrich Wilhem Bessel Award of the Alexander von Humboldt Foundation, and Samuel Wesley Stratton Award, and Jacob Rabinow Award from NIST. Group web page: