Accession Number : ADA538709


Title :   High-Q Superconducting Coplanar Waveguide Resonators for Integration into Molecule Ion Traps


Descriptive Note : Master's thesis


Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE


Personal Author(s) : McCaughan, Adam N


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a538709.pdf


Report Date : May 2010


Pagination or Media Count : 97


Abstract : Over the last decade, quantum information experiments with trapped ions have demonstrated essential steps towards quantum computing and quantum simulation. Large fields are required to achieve strong coupling to the ions via dipolar interactions, and so we fabricated transmission line microresonators - capable of producing large fields in a standing wave at resonance - for eventual integration into 2D ion trap structures. The resonators were superconducting to minimize loss and maximize quality factor. We fabricated the resonators as two dimensional coplanar waveguides in niobium on R-plane sapphire using optical lithography. Resist was patterned on the niobium using optical lithography, developed then reactive-ion etched to transfer the pattern into the niobium. The resonators were cooled and tested in a cryogenic probe station and characterized with a network analyzer. Additionally, the resonator geometry was reproduced in commercial microwave simulation software. Results from our fabricated resonators showed first-resonance quality factors of 1.2 x 104 at 3.23 GHz at device temperatures of 3-4 K.


Descriptors :   *SUPERCONDUCTORS , *TRAPPING(CHARGED PARTICLES) , *RESONATORS , TRANSMISSION LINES , QUANTUM COMPUTING , STANDING WAVES , PHOTOLITHOGRAPHY , WAVEGUIDES , THESES


Subject Categories : Electricity and Magnetism
      Nuclear Physics & Elementary Particle Physics
      Quantum Theory and Relativity


Distribution Statement : APPROVED FOR PUBLIC RELEASE