TY - JOUR

T1 - High cooperativity coupling to nuclear spins on a circuit quantum electrodynamics architecture

AU - Rollano, Victor

AU - de Ory, Marina C.

AU - Buch, Christian D.

AU - Rubin-Osanz, Marcos

AU - Zueco, David

AU - Sanchez-Azqueta, Carlos

AU - Chiesa, Alessandro

AU - Granados, Daniel

AU - Carretta, Stefano

AU - Gomez, Alicia

AU - Piligkos, Stergios

AU - Luis, Fernando

PY - 2022/10/6

Y1 - 2022/10/6

N2 - Superconducting hybrid systems are becoming an increasingly important platform to conduct investigations in the field of quantum information processing. Here, the authors report a highly cooperative coupling between the nuclear spin of an Yb(III) molecular complex with a superconducting microwave resonator achieving a large hyperfine-mediated coupling between a resonator mode and the nuclear spin that could be used for the realization and readout of qudits.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 quantum electrodynamics architectures, the leading technology for solid-state quantum processors. Here, we study the coupling of Yb-173(III) nuclear spin states in an [Yb(trensal)] molecule to superconducting cavities. Experiments have been performed on magnetically dilute 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 [Yb-173(trensal)] spin transitions, a necessary ingredient for the implementation of qudit protocols with molecular spins using a hybrid architecture.

AB - Superconducting hybrid systems are becoming an increasingly important platform to conduct investigations in the field of quantum information processing. Here, the authors report a highly cooperative coupling between the nuclear spin of an Yb(III) molecular complex with a superconducting microwave resonator achieving a large hyperfine-mediated coupling between a resonator mode and the nuclear spin that could be used for the realization and readout of qudits.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 quantum electrodynamics architectures, the leading technology for solid-state quantum processors. Here, we study the coupling of Yb-173(III) nuclear spin states in an [Yb(trensal)] molecule to superconducting cavities. Experiments have been performed on magnetically dilute 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 [Yb-173(trensal)] spin transitions, a necessary ingredient for the implementation of qudit protocols with molecular spins using a hybrid architecture.

KW - REALIZATION

KW - MAGNETS

KW - QUBIT

U2 - 10.1038/s42005-022-01017-8

DO - 10.1038/s42005-022-01017-8

M3 - Journal article

VL - 5

JO - Communications Physics

JF - Communications Physics

SN - 2399-3650

IS - 1

M1 - 246

ER -