Dartmouth Events

Physics and Astronomy Colloquium - Vladan Vuletić, MIT

Title: "Spin Squeezing in Optical-Clock Atoms"

Friday, November 15, 2019
3:30pm – 4:30pm
Wilder 104
Intended Audience(s): Public
Categories: Lectures & Seminars

Abstract: Atomic clocks, surpassing a mind-boggling precision of one part in 1018, are the most accurate instruments ever made by mankind. The performance of the best clocks and other quantum sensors is limited by the quantum projection noise in the final readout measurement, a situation referred to as the standard quantum limit. Entangled states of the many-body system can be used to overcome the standard quantum limit. A particularly simple form of entanglement is spin squeezing, where the quantum noise for the variable of interest, e.g., the phase of an atomic clock, is redistributed into another variable. I will discuss how spin squeezing can be generated by coupling the atomic ensemble to an optical cavity. We report the first sizeable spin squeezing in an optical-clock atom, ytterbium, and discuss prospects for using spin squeezing to improve state-of-the-art optical-transition clocks.

For more information, contact:
Tressena Manning

Events are free and open to the public unless otherwise noted.