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Progress Towards Trapping Very Cold Neutral Atoms in a Dilution Refrigerator

Event Details

Event Dates: 

Monday, August 12, 2013 - 10:00am

Seminar Location: 

  • JILA X317

Speaker Name(s): 

Jeffrey Grover

Speaker Affiliation(s): 

Joint Quantum Institute, University of Maryland and NIST
Seminar Type/Subject

Scientific Seminar Type: 

  • Other

Seminar Type Other: 

Bi-group Seminar

Event Details & Abstract: 

One avenue for creating hybrid quantum systems is the coupling of neutral atoms to superconducting circuits via a magnetic dipole transition. Here we present progress on two parallel projects that are working towards trapping an ensemble of cold Rb atoms within 10 micrometers of a superconducting circuit: a cryogenically-compatible atom trap, and a tunable, light-insensitive, high-Q superconducting resonator. The evanescent field around an optical nanofiber with 99.95% transmission forms our atom trap, and we present the first evidence of Rb atoms trapped around a nanofiber in a room-temperature UHV system.  This in itself is already an interesting platform to explore one dimensional quantum systems. On the microwave side, we fabricate thin-film aluminum resonators that are tunable in-situ with a movable aluminum pin. We systematically study how low levels of optical light affect the linewidth and frequency of the resonator, and we present some proposals for mitigating these effects while maintaining a high quality factor.