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RESEARCH PRODUCT
Decoherence from dipolar interspin interactions in molecular spin qubits
Eugenio CoronadoLuis Escalera-morenoAlejandro Gaita-ariñosubject
PhysicsQuantum decoherenceCondensed matter physicsQuàntums Teoria dels02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesInductive couplingAtomic clockDipoleQubit0103 physical sciencesMolecule010306 general physics0210 nano-technologyHigh electrondescription
The realization of spin-based logical gates crucially depends on magnetically coupled spin qubits. Thus, understanding decoherence when spin qubits are in close proximity will become a roadblock to overcome. Herein, we propose a method free of fitting parameters to evaluate the qubit phase memory time ${T}_{m}$ in samples with high electron spin concentrations. The method is based on a model aimed to estimate magnetic nuclear decoherence [P. C. E. Stamp and I. S. Tupitsyn, Phys. Rev. B 69, 014401 (2004)]. It is applied to a ground-spin $J=8$ magnetic molecule 1 displaying atomic clock transitions, namely ${{[\mathrm{H}{\mathrm{o}}^{\mathrm{III}}{({\mathrm{W}}_{5}{\mathrm{O}}_{18})}_{2}]}^{9}}^{\ensuremath{-}}$, which remarkably increase ${T}_{m}$ at unusually high electron-spin concentrations. Our approach unveils the causes that limit the coherence reached at the clock transitions in challenging systems such as 1, where recent models fail.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-08-13 | Physical Review B |