Bulletin of the American Physical Society
55th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Monday–Friday, June 3–7, 2024; Fort Worth, Texas
Session N10: Novel Approaches to Matterwave Interferometry
8:00 AM–10:00 AM,
Thursday, June 6, 2024
Room: 204AB
Chair: Paul Hamilton, UCLA
Abstract: N10.00002 : Thousandfold Phase Amplification in a Resonant Atom Interferometer via Applying Robust Quantum Control to Multipath Interference*
8:30 AM–9:00 AM
Presenter:
Tim Kovachy
(Northwestern University)
Authors:
Tim Kovachy
(Northwestern University)
Zilin Chen
(Northwestern University)
Kenneth DeRose
(Northwestern University)
Tejas Deshpande
(Northwestern University)
Jonah Glick
(Northwestern University)
Kefeng Jiang
(Northwestern University)
Sharika Saraf
(Northwestern University)
Yiping Wang
(Northwestern University)
Resonant atom interferometers, which amplify the interferometer phase response to signals oscillating at a particular target frequency, have been proposed to boost the sensitivity of atomic dark matter, dark energy, and gravitational wave detectors. In this talk, I will discuss a novel type of robust resonant atom interferometer that applies quantum optimal control to multipath interference of many spatial trajectories to overcome limitations from pulse infidelities. This method allows us to demonstrate resonant phase amplification factors in excess of 1000, arising from the sequential application of in excess of 500 mirror pulses, even with individual pulse transfer efficiencies of only approximately 90%. By contrast, without optimized control, the interferometer fringe visibility rapidly decays as the number of mirror pulses is increased past 10. In this context, I will compare the results of various approaches to quantum optimal control.
*We acknowledge support from the DOE SQMS Center, the Gordon and Betty Moore Foundation, the David and Lucile Packard Foundation, ONR, and NIST.
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