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Quantum Computing and OD-NMR with Isotopologue Complexes
Ruben, Mario - INT, IQMT, Karlsruhe Institute of Technology (KIT) and ISIS-CESQ, University of Satasbourg
Presentation on Monday, June 1, 2026, noon
Location: MIT CUA Room (26-214)
The synthetic engineering of the nuclear spin degree of freedom in lanthanide molecules will be presented with the goal to make the respective isotopologue complexes accessible as quantum registers in quantum protocols.[1-2] Therefore, we report on the implementation of lanthanide (III) metal complexes into spintronic and optical devices. The Hilbert space spanned by the nuclear spins in different ALn(III) isotopologues (Ln = Dy, Tb, Eu, Yb, Er) will be addressed electrically [3-11] and optically [12-15], partially at the single-molecule level. The main motivation is to realize long-sought coherent photon-nuclear-spin interfaces for superposition and entanglement of larger qubit ensembles, even non-locally distributed. Thereby, it was recently demonstrated by our group that ultra-narrow optical
linewidths in separately synthesized molecular lanthanide crystals of 151Eu(III) and 153Eu(III
isotopologues enable the optical addressing of nuclear spins levels in mono- and dinuclear complexes. [12,13] Finally, the first-time observation of an optically detected Nuclear Magnetic Resonance (OD-NMR) experiment in a 151Eu(III) complex will be reported (Figure 1). [14]
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[13] D. Serrano et al. Nature 2022, 603, 241.
[14] E. Vasiliev et al. Nature Mater. 2026, doi.org/10.1038/s41563-026-02539-0
[15] X. Sun et. al. Nature Chem. 2026, doi.org/10.1038/s41557-026-02114-9