Coupling Harmonic Oscillators to Superconducting Quantum Interference Cavities

Coupling Harmonic Oscillators to Superconducting Quantum Interference Cavities

Corveira Rodrigues, I.C. (TU Delft QN/Steele Lab)

Steele, G.A. (promotor)
Groeblacher, S. (promotor)

Delft University of Technology

2021-05-25

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.

SQUID cavities
Optomechanics
Superconducting circuits
Photon-pressure coupling

https://doi.org/10.4233/uuid:90c588b1-ebef-4ab8-b51f-b3221d8ad6cc

978-90-8593-474-5

Casimir PhD Series, 2021 (08)

Institutional Repository

doctoral thesis

© 2021 I.C. Corveira Rodrigues