Coupling of a neutral atomic ensemble to superconducting circuits via a magnetic dipole transition forms an interesting hybrid system. Here we present progress towards trapping cold rubidium atoms within 10 micrometers of a superconducting circuit using a cryogenically-compatible atom trap and a tunable, high-Q superconducting resonator. Evanescent fields around an optical nanofiber with 99.95% transmission form an atom trap suitable for a 15 mK dilution refrigerator. We explore higher-order guided modes in the nanofibers and study the dynamics of atoms near the nanofiber through conditional measurements of the intensity.
Work done in collaboration with: Jeffrey A. Grover1, Jonathan E. Hoffman1,
Jongmin Lee1, Pablo A. Solano1, Steven L. Rolston1, Guy Beadie2, and Fredrik K. Fatemi2.
1. Joint Quantum Institute, NIST and Department of Physics, University of Maryland, College Park, MD 20742, USA.
2. Optical Sciences Division, Naval Research Laboratory, Washington DC, 20375, USA.
Work supported by NSF though the PFC@JQI, the Atomtronics MURI, ONR, and DARPA.