On-Chip Quantum-Dot Light Source for Quantum-Device Readout

  title={On-Chip Quantum-Dot Light Source for Quantum-Device Readout},
  author={Y.-Y. Liu and Jir{\'i} Stehl{\'i}k and Xiao Mi and Thomas Hartke and Jason R. Petta},
  journal={Physical review applied},
We use microwave radiation generated by a semiconductor double quantum dot (DQD) micromaser for charge state detection. A cavity is populated with n_c ~ 6000 photons by driving a current through an emitter DQD. These photons are used to sense the charge state of a target DQD that is located at the opposite end of the cavity. Charge dynamics in the target DQD influence the output power and emission frequency of the maser. Three different readout mechanisms are compared. The detection scheme… 

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