High cooperativity coupling to nuclear spins on a circuit QED architecture

Abstract

Nuclear spins are candidates to encode qubits or qudits due to their isolation from magnetic noise and potentially long coherence times. However, their weak coupling to external stimuli makes them hard to integrate into circuit-QED architectures, the leading technology for solid-state quantum processors. Here, we study the coupling of ${}^{173}$Yb(III) nuclear spin states in an [Yb(trensal)] molecule to superconducting cavities. Experiments have been performed on magnetically diluted single crystals placed on the inductors of lumped-element $LC$ superconducting resonators with characteristic frequencies spanning the range of nuclear and electronic spin transitions. We achieve a high cooperative coupling to all electronic and most nuclear [${}^{173}$Yb(trensal)] spin transitions. This result is a big leap towards the implementation of qudit protocols with molecular spins using a hybrid architecture.

8 pages, 5 figures, 66 references, supplemental information (14 pages, 12 figures)

References in corpus (16)

• Supplementary information for "Quantum supremacy using a programmable superconducting processor"
• Surface codes: Towards practical large-scale quantum computation
• Quantum computational advantage using photons
• Strong quantum computational advantage using a superconducting quantum processor
• Operating Quantum States in Single Magnetic Molecules: Implementation of Grover's Quantum Algorithm
• Efficient and robust analysis of complex scattering data under noise in microwave resonators
• Quantum computing with an electron spin ensemble
• Protecting a Spin Ensemble against Decoherence in the Strong-Coupling Regime of Cavity QED
• Three addressable spin qubits in a molecular single-ion magnet
• Single qudit realization of the Deutsch algorithm using superconducting many-level quantum circuits
• A scalable architecture for quantum computation with molecular nanomagnets
• Randomized benchmarking of single and multi-qubit control in liquid-state NMR quantum information processing
• Inductive-detection electron-spin resonance spectroscopy with $65$spins$/\sqrt{\text{Hz}}$ sensitivity
• Multilevel superconducting circuits as two-qubit systems: Operations, state preparation, and entropic inequalities
• Enhanced molecular spin-photon coupling at superconducting nanoconstrictions
• Coherent manipulation of electron spins up to ambient temperatures in Cr${}^{5+}$(S=1/2) doped K${}_3$NbO${}_8$