Literature DB >> 23006294

Flux noise probed with real time qubit tomography in a Josephson phase qubit.

Daniel Sank1, R Barends, Radoslaw C Bialczak, Yu Chen, J Kelly, M Lenander, E Lucero, Matteo Mariantoni, A Megrant, M Neeley, P J J O'Malley, A Vainsencher, H Wang, J Wenner, T C White, T Yamamoto, Yi Yin, A N Cleland, John M Martinis.   

Abstract

We measure the dependence of qubit phase coherence and flux noise on inductor loop geometry. While wider inductor traces change neither the flux noise power spectrum nor the qubit dephasing time, increased inductance leads to a simultaneous increase in both. Using our new tomographic protocol for measuring low frequency flux noise, we make a direct comparison between the flux noise spectrum and qubit phase decay, finding agreement within 10% of theory.

Year:  2012        PMID: 23006294     DOI: 10.1103/PhysRevLett.109.067001

Source DB:  PubMed          Journal:  Phys Rev Lett        ISSN: 0031-9007            Impact factor:   9.161


  3 in total

1.  High-performance superconducting quantum processors via laser annealing of transmon qubits.

Authors:  Eric J Zhang; Srikanth Srinivasan; Neereja Sundaresan; Daniela F Bogorin; Yves Martin; Jared B Hertzberg; John Timmerwilke; Emily J Pritchett; Jeng-Bang Yau; Cindy Wang; William Landers; Eric P Lewandowski; Adinath Narasgond; Sami Rosenblatt; George A Keefe; Isaac Lauer; Mary Beth Rothwell; Douglas T McClure; Oliver E Dial; Jason S Orcutt; Markus Brink; Jerry M Chow
Journal:  Sci Adv       Date:  2022-05-13       Impact factor: 14.957

2.  Cosmological flux noise and measured noise power spectra in SQUIDs.

Authors:  Christian Beck
Journal:  Sci Rep       Date:  2016-06-20       Impact factor: 4.379

3.  Bias-preserving gates with stabilized cat qubits.

Authors:  Shruti Puri; Lucas St-Jean; Jonathan A Gross; Alexander Grimm; Nicholas E Frattini; Pavithran S Iyer; Anirudh Krishna; Steven Touzard; Liang Jiang; Alexandre Blais; Steven T Flammia; S M Girvin
Journal:  Sci Adv       Date:  2020-08-21       Impact factor: 14.136

  3 in total

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