When:
Tuesday, November 8, 2022
2:00 PM - 3:30 PM CT
Where: Technological Institute, F160, 2145 Sheridan Road, Evanston, IL 60208 map it
Audience: Faculty/Staff - Student - Post Docs/Docs - Graduate Students
Contact:
Laura Nevins
(847) 467-6678
Group: Center for Fundamental Physics Colloquia
Category: Lectures & Meetings, Academic
Abstract:
I will describe quantum-enhanced sensing of motional excitations and electric fields using a crystal of ~150 trapped ions formed in a Penning ion trap. By entangling the ion crystal motion with the collective spin and controlling the coherent dynamics via a many-body echo, a motional excitation is mapped into a spin rotation, which we measure. We achieve a sensitivity for measuring motional excitations of 8.8 ± 0.4 decibels below the standard quantum limit and a sensitivity for measuring electric fields of 240 ± 10 nanovolts per meter in 1 second. Feasible improvements should enable the use of trapped ions in searches for dark matter.
In collaboration with K. Gilmore, M. Affolter, R. J. Lewis-Swan, D. Barberena, E. Jordan, and A. M. Rey
Speaker: John Bollinger, NIST
Keywords: Physics, CFP