Sensitive spin detection using an on-chip SQUID-waveguide resonator

Abstract

Precise detection of spin resonance is of paramount importance to achieve coherent spin control in quantum computing. We present a novel setup for spin resonance measurements, which uses a dc-SQUID flux detector coupled to an antenna from a coplanar waveguide. The SQUID and the waveguide are fabricated from 20~nm Nb thin film, allowing high magnetic field operation with the field applied parallel to the chip. We observe a resonance signal between the first and third excited states of Gd spins $S=7/2$ in a CaWO${}_4$ crystal, relevant for state control in multi-level systems.

submitted

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Cited by in corpus (8)

• Electron paramagnetic resonance spectroscopy using a single artificial atom
• Electron Spin Resonance with up to 20 Spin Sensitivity Measured using a Superconducting Flux Qubit
• Experimental protection of quantum coherence by using a phase-tunable image drive
• Nano-bridge Superconducting Quantum Interference Devices: beyond the Josephson limit
• On-Chip Detection of Electronuclear Transitions in the ${}^{155,157}$Gd Multilevel Spin System
• Quantum interference in asymmetric superconducting nanowire loops
• Polarizing electron spins with a superconducting flux qubit
• Dual on-chip SQUID measurement protocol for flux detection in large magnetic fields