Apr 16, 2019 3:45 pm - Nielsen Hall 170 - Colloquium
Grant Biedermann - Sandia National Labs
Growing complexity in quantum metrology with neutral atom spins

The spin degrees of freedom of ultracold neutral atoms in their ground electronic states provide a natural platform for precision metrology of inertial forces.  Given their long coherence times, weak interactions with laboratory environments, and our ability to control them with magneto-optical fields, numerous experiments have shown record-breaking advances in both applied and scientific pursuits.  Beyond this, the recent introduction of strong, entangling interactions via Rydberg states, offers the allure of creating optimal quantum many-body states for metrology.  A central theme in our research is to expand the metrological utility of atom interferometers with novel techniques, wherein we have investigated a high-data rate technique for dynamic scenarios, and a single atom force sensor.  Expanding this theme further, we have developed a Rydberg-dressed interaction between the spins of individually controlled cesium atoms, which has the advantage of being both tunable and strong, and can enable complex many-body dynamics.  We employ this interaction to produce entanglement between neutral atoms and investigate the potential of this technique for high-fidelity quantum control and measurement.