The seminar will be delivered by Edvinas Gvozdiovas, a PhD student at the Institute of Theoretical Physics and Astronomy, Faculty of Physics, Vilnius University, and a Visiting Researcher at the U.S. National Institute of Standards and Technology (NIST).
About the talk
We present a nondestructive in situ method for measuring and stabilizing slowly drifting magnetic fields in cold-atom experiments. Standard magnetic field sensors are widely used in experimental systems, but their accuracy, precision, and dynamic range can be limited. These sensors can also interfere with the experimental apparatus. We overcome these challenges by using the atomic system itself as a magnetometer.
To this end, we perform two weak measurements to determine the Zeeman shift of a magnetically sensitive atomic transition and, from it, the magnetic field strength. We implement the method using ultracold ⁸⁷Rb atoms, which are weakly measured using partial-transfer absorption imaging. We then apply a Kalman filter to stabilize the magnetic field and eliminate long-term magnetic field drift without significantly increasing the noise between individual measurements.
Join us to learn about recent advances in quantum gas experiments, discover innovative approaches to magnetic field measurement and stabilization, and exchange ideas with colleagues working in related fields.
To this end, we perform two weak measurements to determine the Zeeman shift of a magnetically sensitive atomic transition and, from it, the magnetic field strength. We implement the method using ultracold ⁸⁷Rb atoms, which are weakly measured using partial-transfer absorption imaging. We then apply a Kalman filter to stabilize the magnetic field and eliminate long-term magnetic field drift without significantly increasing the noise between individual measurements.
Join us to learn about recent advances in quantum gas experiments, discover innovative approaches to magnetic field measurement and stabilization, and exchange ideas with colleagues working in related fields.
The seminar will be held in English.
This seminar is part of the "Sunrise Valley Quantum Research Seminars" series.
Organisers: VU Faculty of Physics in collaboration with the Center for Physical Sciences and Technology (FTMC), the Lithuanian Physical Society, and Quantum Lithuania.
