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Y-Y Liu1, K D Petersson1, J Stehlik1

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We observed photon emission from a superconducting resonator coupled to an Indium Arsenide double quantum dot. This electronic transport phenomenon resulted in a cavity transmission gain of up to 15.

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Area of Science:

  • Quantum dots
  • Superconducting circuits
  • Electron-phonon interactions

Background:

  • Investigating quantum phenomena in semiconductor heterostructures.
  • Exploring coupling between quantum dots and microwave resonators.
  • Understanding inelastic tunneling mechanisms.

Purpose of the Study:

  • To study photon emission from a cavity coupled to a voltage-biased Indium Arsenide double quantum dot (DQD).
  • To investigate the influence of electron-phonon coupling and cavity mode on inelastic tunneling.
  • To analyze cavity transmission gain under driven conditions.

Main Methods:

  • Utilizing a voltage-biased Indium Arsenide double quantum dot (DQD).
  • Coupling the DQD to a superconducting transmission line resonator.
  • Measuring photon emission and cavity transmission under a small cavity drive field.

Main Results:

  • Observed electronic transport through the DQD induces photon emission from the cavity at a rate of 10 MHz.
  • Achieved a cavity transmission gain of up to 15 with a weak cavity drive field.
  • Demonstrated a significant interaction between the DQD, electron-phonon coupling, and the cavity mode.

Conclusions:

  • Inelastic tunneling in the DQD mediates photon emission and cavity gain.
  • Simultaneous emission of phonons and photons may be crucial for inelastic tunneling processes.
  • Results suggest a need for refined theoretical models incorporating multi-particle emission.