Sensitive spin detection using an on-chip SQUID-waveguide resonator

G. Yue; L. Chen; J. Barreda; V. Bevara; L. Hu; L. Wu; Z. Wang; P. Andrei; S. Bertaina; I. Chiorescu

doi:10.1063/1.5006693

Sensitive spin detection using an on-chip SQUID-waveguide resonator

Mesoscale and Nanoscale Physics 2017-11-17 v1

Authors: G. Yue , L. Chen , J. Barreda , V. Bevara , L. Hu , L. Wu , Z. Wang , P. Andrei , S. Bertaina , I. Chiorescu

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Abstract

Precise detection of spin resonance is of paramount importance to achieve coherent spin control in quantum computing. We present a novel setup for spin resonance measurements, which uses a dc-SQUID flux detector coupled to an antenna from a coplanar waveguide. The SQUID and the waveguide are fabricated from 20~nm Nb thin film, allowing high magnetic field operation with the field applied parallel to the chip. We observe a resonance signal between the first and third excited states of Gd spins $S=7/2$ in a CaWO $_4$ crystal, relevant for state control in multi-level systems.

Keywords

superconducting quantum interference devices magnetic resonance quantum spin systems

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@article{arxiv.1710.10506,
  title  = {Sensitive spin detection using an on-chip SQUID-waveguide resonator},
  author = {G. Yue and L. Chen and J. Barreda and V. Bevara and L. Hu and L. Wu and Z. Wang and P. Andrei and S. Bertaina and I. Chiorescu},
  journal= {arXiv preprint arXiv:1710.10506},
  year   = {2017}
}

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Sensitive spin detection using an on-chip SQUID-waveguide resonator

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