Physics Colloquium - Professor Jun Ye

Physics Colloquium - Professor Jun Ye

Quantum matter and atomic clocks

Date

March 11, 2019 - 3:00pm to 4:00pm

Location

Pettit Building

Room

Conference Rooms 102A&B

Affiliation

University of Colorado

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Abstract

Relentless pursuit of spectroscopy resolution has been a key driving force for important scientific and technological breakthroughs, including the invention of laser and the creation of cold atomic matter.  The most stable lasers now maintain optical phase coherence over tens of seconds. This unprecedented spectral resolving power has been transferred across the entire visible range and beyond, unleashing powerful new spectroscopic applications. Meanwhile, precise quantum state engineering of individual atoms has led to the unprecedented measurement performance for time and frequency. The use of many atoms not only enhances counting statistics, but also provides a powerful tool to protect against systematic uncertainties.

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. Such precise control of light-matter interactions is fostering new capabilities to probe fundamental and emerging phenomena.