Amplified and tunable transverse and longitudinal spin-photon coupling in hybrid circuit-QED

2017/12/06 by Neill Lambert, Mauro Cirio, Matthieu Delbecq +5 · 27 citations
Computer Science · Physics and Astronomy · #Condensed matter physics #Coupling (piping) #Electron #Hamiltonian (control theory) #Microwave #Neural Networks and Reservoir Computing #Photon #Physics #Quantum Information and Cryptography #Quantum electrodynamics #Quantum mechanics #Strong Light-Matter Interactions #Transverse plane #cond-mat.mes-hall #quant-ph

paper · pdf · doi:10.1103/physrevb.97.125429

published in Physical review. B./Physical review. B 97(12) (American Physical Society) · 11 pages

arxiv created 2017/12/06 · openalex publication_date 2018/03/26 · arxiv updated 2018/04/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We describe a method to tune, in situ, between transverse and longitudinal light-matter coupling in a hybrid circuit-QED device composed of an electron-spin degree of freedom coupled to a microwave transmission line cavity. Our approach relies on periodic modulation of the coupling itself, such that in a certain frame the interaction is both amplified and either transverse or, by modulating at two frequencies, longitudinal. The former realizes an effective simulation of certain aspects of the ultra-strong-coupling regime, while the latter allows one to implement a longitudinal readout scheme even when the intrinsic Hamiltonian is transverse, and the individual spin or cavity frequencies cannot be changed. We analyze the fidelity of using such a scheme to measure the state of the electron-spin degree of freedom, and argue that the longitudinal readout scheme can operate in regimes where the traditional dispersive approach fails.

Citations

• Driven quantum transport on the nanoscale
• Spin interactions and switching in vertically tunnel-coupled quantum dots
• Influence of confining potentials on the exchange coupling in double quantum dots
• Cavity quantum electrodynamics for superconducting electrical circuits: An architecture for quantum computation
• Quantum information processing with superconducting qubits in a microwave field
• Dipole coupling of a double quantum dot to a microwave resonator
• Circuit quantum electrodynamics with a spin qubit
• Quantum nonlinear optics without photons
• Strong Coupling Cavity QED with Gate-Defined Double Quantum Dots Enabled by a High Impedance Resonator

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