Interacting defects generate stochastic fluctuations in superconducting qubits

  title={Interacting defects generate stochastic fluctuations in superconducting qubits},
  author={J{\'e}r{\'e}my H. B{\'e}janin and C. T. Earnest and Abdelrahman Sharafeldin and Matteo Mariantoni},
  journal={Physical Review B},
Amorphous dielectric materials have been known to host two-level systems (TLSs) for more than four decades. Recent developments on superconducting resonators and qubits enable detailed studies on the physics of TLSs. In particular, measuring the loss of a device over long time periods (a few days) allows us to investigate stochastic fluctuations due to the interaction between TLSs. We measure the energy relaxation time of a frequency-tunable planar superconducting qubit over time and frequency… 
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