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Coherent microwave-photon-mediated coupling between a semiconductor and a superconducting qubit.

  • Scarlino P Department of Physics, ETH Zürich, CH-8093, Zürich, Switzerland. pscarlinoeth@gmail.com.
  • van Woerkom DJ Department of Physics, ETH Zürich, CH-8093, Zürich, Switzerland.
  • Mendes UC Institut quantique and Department de Physique, Université de Sherbrooke, Sherbrooke, Québec, J1K 2R1, Canada.
  • Koski JV Department of Physics, ETH Zürich, CH-8093, Zürich, Switzerland.
  • Landig AJ Department of Physics, ETH Zürich, CH-8093, Zürich, Switzerland.
  • Andersen CK Department of Physics, ETH Zürich, CH-8093, Zürich, Switzerland.
  • Gasparinetti S Department of Physics, ETH Zürich, CH-8093, Zürich, Switzerland.
  • Reichl C Department of Physics, ETH Zürich, CH-8093, Zürich, Switzerland.
  • Wegscheider W Department of Physics, ETH Zürich, CH-8093, Zürich, Switzerland.
  • Ensslin K Department of Physics, ETH Zürich, CH-8093, Zürich, Switzerland.
  • Ihn T Department of Physics, ETH Zürich, CH-8093, Zürich, Switzerland.
  • Blais A Institut quantique and Department de Physique, Université de Sherbrooke, Sherbrooke, Québec, J1K 2R1, Canada.
  • Wallraff A Department of Physics, ETH Zürich, CH-8093, Zürich, Switzerland.
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  • 2019-07-10
Published in:
  • Nature communications. - 2019
General Biochemistry, Genetics and Molecular Biology
General Physics and Astronomy
General Chemistry
English Semiconductor qubits rely on the control of charge and spin degrees of freedom of electrons or holes confined in quantum dots. They constitute a promising approach to quantum information processing, complementary to superconducting qubits. Here, we demonstrate coherent coupling between a superconducting transmon qubit and a semiconductor double quantum dot (DQD) charge qubit mediated by virtual microwave photon excitations in a tunable high-impedance SQUID array resonator acting as a quantum bus. The transmon-charge qubit coherent coupling rate (~21 MHz) exceeds the linewidth of both the transmon (~0.8 MHz) and the DQD charge qubit (~2.7 MHz). By tuning the qubits into resonance for a controlled amount of time, we observe coherent oscillations between the constituents of this hybrid quantum system. These results enable a new class of experiments exploring the use of two-qubit interactions mediated by microwave photons to create entangled states between semiconductor and superconducting qubits.
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  • English
Open access status
gold
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https://sonar.ch/global/documents/136979
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