arXiv:1707.08906 · Physical Review Applied

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

Y.-Y. Liu, J. Stehlik, X. Mi, Thomas R. Hartke, M. J. Gullans, J. R. Petta

Published Jan 29, 2018• 9 citations

Abstract

Microwave readout of charge states and spin states is important for quantum information science, but is difficult to scale to a large number of qubits, due to cost and the size of the components required to faithfully transmit the signal from room temperature to mK qubit temperatures. In this study, a voltage-biased semiconductor double quantum dot is used to generate microwave photons, yielding a cryogenic on-chip source for charge-state readout. Surprisingly, the emission properties of the double dot are affected by other qubits placed in the same microwave cavity. These results should facilitate the development of a large quantum processor to realize true quantum supremacy.

DOI: 10.1103/physrevapplied.9.014030

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