Kavli Affiliate: Giordano Scappucci
| First 5 Authors: Juan S. Rojas-Arias, Akito Noiri, Jun Yoneda, Peter Stano, Takashi Nakajima
| Summary:
We investigate low-frequency noise in a spin-qubit device made in
isotopically purified Si/Si-Ge. Observing sizable cross-correlations among
energy fluctuations of different qubits, we conclude that these fluctuations
are dominated by charge noise. At low frequencies, the noise spectra do not fit
well a power law; rather, we can recognize a few individual two-level
fluctuators (TLFs). We demonstrate that the noise cross-correlations allow one
to get information on the spatial location of such individual TLFs.
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