Title: Programmable optical clocks for quantum-enhanced sensing Abstract: Optical atomic clocks based on transitions in atoms and ions continue to be at the frontier of time and frequency metrology. The precision of such a clock depends on the number of atoms that can be interrogated in parallel, as well as the relative coherence time of the atoms with the oscillator that is being stabilized to the atoms. When using many atoms, multi-particle entanglement can also be used to improve the precision of the clock. I will describe our work in this area, using an arrays of alkaline-earth atoms that are controlled with single-particle resolution via a tweezer array and entangled using Rydberg interactions. I will describe one experiment using strontium where we demonstrate a new multi-qubit gate protocol to create so-called “cascaded GHZ states” for enhanced sensing with a large dynamic range, as well as a developing new approach to related ideas using Ytterbium.
At 4pm, there will be a tea in ATL 2117 for our speaker and students/postdocs - this is a chance to ask questions directly to our speaker. Refreshments will be served.