Coupling Harmonic Oscillators to Superconducting Quantum Interference Cavities

Research output: ThesisDissertation (TU Delft)

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Abstract

This thesis explores the coupling of microwave cavities containing a Superconducting QUantum Interference Device (SQUID) to a mechanical resonator by means of a flux-mediated optomechanical coupling scheme, and to a Radio-Frequency (RF) circuit via a photon-pressure interaction. While flux-mediated optomechanical systems open the door for the exploration of optomechanical single-photon effects, ultimately allowing for the generation of non-classical states in mechanical oscillators and for the creation of optomechanical qubits, the realization of photon-pressure systems brings rich possibilities for quantum-limited sensing and quantum signal processing, representing a first step towards radio-frequency quantum photonics. Besides presenting the experimental work done with the systems described above, this thesis also provides a theoretical description of their working principle, details on their fabrication, and insights on maximizing their single-photon coupling strengths as well as an overview of the experimental challenges associated with SQUID cavities.
Original languageEnglish
QualificationDoctor of Philosophy
Awarding Institution
  • Delft University of Technology
Supervisors/Advisors
  • Steele, G.A., Supervisor
  • Groeblacher, S., Supervisor
Award date25 May 2021
Print ISBNs978-90-8593-474-5
Electronic ISBNs978-90-8593-474-5
DOIs
Publication statusPublished - 2021

Keywords

  • SQUID cavities
  • Optomechanics
  • Superconducting circuits
  • Photon-pressure coupling

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