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Engineering multimode interactions in circuit quantum acoustodynamics.

Uwe von Lüpke1,2, Ines C Rodrigues1,2, Yu Yang1,2

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|April 19, 2024
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Summary
This summary is machine-generated.

Scientists engineered tunable interactions between mechanical modes using a superconducting qubit. This quantum control enables phonon-based quantum simulations and the development of novel quantum memories.

Keywords:
Quantum informationQuantum mechanicsQubits

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Area of Science:

  • Quantum Information Science
  • Quantum Optics
  • Condensed Matter Physics

Background:

  • Mechanical resonators offer practical advantages for quantum information processing due to their high-quality-factor modes and integration capabilities.
  • Directly engineering interactions between mechanical modes for quantum gate emulation remains a significant challenge.

Purpose of the Study:

  • To demonstrate an in situ tunable interaction between mechanical modes of a high-overtone bulk acoustic-wave resonator.
  • To explore the use of this engineered interaction for quantum simulations and the Hong-Ou-Mandel effect with phonons.

Main Methods:

  • Utilizing a parametrically driven superconducting transmon qubit to mediate interactions between phononic modes.
  • Tailoring the qubit-mediated interaction to couple pairs or triplets of mechanical modes.
  • Demonstrating the Hong-Ou-Mandel effect using the engineered phonon-phonon interaction.

Main Results:

  • Successfully demonstrated an in situ tunable beamsplitter-type interaction between multiple mechanical modes.
  • Showed that the interaction can be precisely controlled to couple selected pairs or triplets of phononic modes.
  • Experimentally verified the Hong-Ou-Mandel effect for phonons, a key quantum optical phenomenon.

Conclusions:

  • The engineered phonon-phonon interaction provides a powerful tool for quantum control in mechanical resonators.
  • This work establishes phononic systems as a viable platform for quantum simulations and quantum memories.
  • The demonstrated quantum control over mechanical modes opens new avenues for scalable quantum technologies.