JACoW logo

Joint Accelerator Conferences Website

The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.

BiBTeX citation export for WEPLM21: High-Quality Resonators for Quantum Information Systems

  author       = {S.V. Kuzikov and S.P. Antipov and P.V. Avrakhov and E. Gomez},
  title        = {{High-Quality Resonators for Quantum Information Systems}},
  booktitle    = {Proc. NAPAC'19},
  pages        = {690--693},
  paper        = {WEPLM21},
  language     = {english},
  keywords     = {SRF, cavity, controls, cryogenics, photon},
  venue        = {Lansing, MI, USA},
  series       = {North American Particle Accelerator Conference},
  number       = {4},
  publisher    = {JACoW Publishing, Geneva, Switzerland},
  month        = {10},
  year         = {2019},
  issn         = {2673-7000},
  isbn         = {978-3-95450-223-3},
  doi          = {10.18429/JACoW-NAPAC2019-WEPLM21},
  url          = {http://jacow.org/napac2019/papers/weplm21.pdf},
  note         = {https://doi.org/10.18429/JACoW-NAPAC2019-WEPLM21},
  abstract     = {We analyze ultra-high-quality factor resonators for quantum computer architectures. As qubit operation requires external DC fields, we started our study with a conventional closed copper cavity which naturally allows external magnetic field. In order to increase quality factor and to keep DC magnetic field control at a level less than critical field, an open SRF resonator promises much higher quality. The next step resonator is a photonic band gap (PBG) resonator. This resonator allows easy external either magnetic or electric field control. It consists of a periodic 3D set of sapphire rods assembled between two superconducting plates. The PBG resonator exploits unique properties of the crystalline sapphire. Tangent delta for sapphire in X-band is reported at 10⁻⁹ ’ 10-10 at 4 K. That is why, the Q-factor of the sapphire PBG resonator can be expected as high as 10 billions at mK temperatures which provides long relaxation times (dephasing etc.). The established PBG design implies obtaining a large Purcell factor, i.e. large ratio of quality to mode volume which is important parameter to establish strong interaction of a qubit with the cavity mode rather than RF noise.},