Southwest Quantum Information and Technology

Entangled optical atomic clock

Presenting Author: Vladan Vuletić , Massachusetts Institute of Technology

Entangled states of many particles can be used to overcome limits on measurements performed with ensembles of independent atoms (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. 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. The squeezing is generated in the electronic ground state, and then transferred onto the clock transition via the clock laser. I will also discuss new results where we create more complex entangled states via atom-cavity interaction, including an effective time-reversal protocol for a many-body Hamiltonian.

(Session 4 : Friday from 10:00am-10:30am)