Two-photon coupling via Josephson element I: Breaking the symmetry with magnetic fields
arXiv:2412.05016 · doi:10.1103/w12t-92qg
Abstract
We consider a coupling element based on a symmetric superconducting quantum interference device (SQUID) and show that it mediates a two-photon interaction. This and other inductive interactions due to the SQUID can be switched off in situ. We derive the system Hamiltonian for coupled resonator and rf SQUID. The rf SQUID dwells in the vicinity of its metastable well holding a number of energy states and acts as an artificial atom. We discuss how the Josephson symmetry breaks owing to magnetic fields in the superconducting loops. We assess that the two-photon coupling strength reaches 18 MHz which can exceed the single-photon capacitive interaction in the coupler.
10 pages, 5 figures: In v.3, introduced changes as suggested by referees. In v.2, added more references, corrected the claim on the waveguide coupling, corrected the transmon discussion, extended conclusions, stated precisely what inductive interactions can be switched off in the abstract
References in corpus (21)
- Charge insensitive qubit design derived from the Cooper pair box
- Circuit Quantum Electrodynamics
- Quantum technologies with hybrid systems
- Ubiquitous Superconducting Diode Effect in Superconductor Thin Films
- State tomography of capacitively shunted phase qubits with high fidelity
- Microwave response of vortices in superconducting thin films of Re and Al
- Trapping a single vortex and reducing quasiparticles in a superconducting resonator
- Perspective on traveling wave microwave parametric amplifiers
- Multiphoton blockade in the two-photon Jaynes-Cummings model
- Energy gap measurement of nanostructured thin aluminium films for use in single Cooper-pair devices
- Rabi oscillations in a qubit coupled to a quantum two-level system
- High-Fidelity Measurement of a Superconducting Qubit using an On-Chip Microwave Photon Counter
- Microwave photon detection at parametric criticality
- Niobium in clean limit: an intrinsic type-I superconductor
- High-fidelity qubit readout using interferometric directional Josephson devices
- Driven Multiphoton Qubit-Resonator Interactions
- Superconducting microwave resonators with non-centrosymmetric nonlinearity
- A superconducting detector that counts microwave photons up to two
- Multiphonon transitions in a quantum electromechanical system
- Photon-number resolution with microwave Josephson photomultipliers
- Flux qubit-based detector of microwave photons