Quantum Science Seminar #67

Magnetic molecules in quantum nanoscience

Implementation of advanced Quantum Technologies might benefit from the remarkable quantum properties shown by molecular spin systems based on the coordination bond. The versatility of the molecular approach combined with rational design has recently boosted the operativity temperature of molecules acting as bits of memory, otherwise known as Single-Molecule Magnets, or the coherence time of molecular spin qubits. The richness and tunability of the spectrum of spin levels make them particularly suitable for quantum error correction, while spin-spin interaction can be tuned to realize quantum gates and quantum simulators. Molecules can also be processed to be deposited on surfaces, allowing the realization of hybrid nanostructures. However, the molecular approach also poses key challenges, requiring for instance to overcome limitations such as those induced by low energy vibrational modes typical of molecular lattices. This drawback can be in part overcome by chemical design. Achieving the control of a single molecule is also challenging, requiring to couple the electric field, which can be confined at the molecular scale, with the spin degrees of freedom of the molecule. Initialization of spin systems is also an issue because only at very low temperatures does the Zeeman interaction overcome the thermal energy. Learning from nature, we are proposing to exploit chirality, and in particular spin selectivity in electron transfer processes through chiral structures, as an alternative way to spin polarize molecular systems. An overview of our recent results will be provided.

References:

[1] Giulia Serrano, Lorenzo Poggini, Matteo Briganti, Andrea Luigi Sorrentino, Giuseppe Cucinotta, Luigi Malavolti, Brunetto Cortigiani, Edwige Otero, Philippe Sainctavit, Sebastian Loth, Francesca Parenti, Anne-Laure Barra, Alessandro Vindigni, Andrea Cornia, Federico Totti, Matteo Mannini, and Roberta Sessoli

"Quantum dynamics of a single molecule magnet on superconducting Pb(111)“

Nature Materials 19, 546 (2020).


[2] E. Garlatti, L. Tesi, A. Lunghi, M. Atzori, D. J. Voneshen, P. Santini, S. Sanvito, T. Guidi, R. Sessoli, and S. Carretta

"Unveiling phonons in a molecular qubit with four-dimensional inelastic neutron scattering and density functional theory"

Nature Communications 11, 1751 (2020).


[3] Matteo Atzori and Roberta Sessoli

"The Second Quantum Revolution: Role and Challenges of Molecular Chemistry"

Journal of the American Chemical Society 141, 11339 (2019).


Hier finden Sie den Link zum Livetalk um 17.00 Uhr (CEST) sowie zu den Aufzeichnungen im Nachhinein:

Quantum Science Seminar #67 - Roberta Sessoli

Hier sehen Sie die Aufzeichnung des letzten Vortrags von Andreas Wallraff

Quantum Science Seminar #66 - Andreas Wallraff

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The Quantum Science Seminar will take a Summer break during August and will be back in early September.

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