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Title: Protection layers on a superconducting microwave resonator toward a hybrid quantum system

We propose a protection scheme of a superconducting microwave resonator to realize a hybrid quantum system, where cold neutral atoms are coupled with a single microwave photon through magnetic dipole interaction at an interface inductor. The evanescent field atom trap, such as a waveguide/nanofiber atom trap, brings both surface-scattered photons and absorption-induced broadband blackbody radiation which result in quasiparticles and a low quality factor at the resonator. A proposed multiband protection layer consists of pairs of two dielectric layers and a thin nanogrid conductive dielectric layer above the interface inductor. We show numerical simulations of quality factors and reflection/absorption spectra, indicating that the proposed multilayer structure can protect a lumped-element microwave resonator from optical photons and blackbody radiation while maintaining a reasonably high quality factor.
Authors:
 [1] ;  [2] ;  [3]
  1. Joint Quantum Institute, Department of Physics, University of Maryland and National Institute of Standards and Technology, College Park, Maryland 20742 (United States)
  2. (United States)
  3. Department of Electrical and Computer Engineering, University of Maryland, College Park, Maryland 20742 (United States)
Publication Date:
OSTI Identifier:
22492784
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 13; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION SPECTRA; BLACKBODY RADIATION; INTERFACES; LAYERS; MAGNETIC DIPOLES; MICROWAVE RADIATION; PHOTONS; QUALITY FACTOR; QUANTUM SYSTEMS; REFLECTION; RESONATORS; SURFACES; TRAPS; WAVEGUIDES