Molecular magnetic materials for quantum technologies

Molecular magnetic materials for quantum technologies

Abstrakt

Abstract Molecular magnetic materials offer promising platforms for data storage and quantum bits, which are key technologies to address current societal challenges of computational power and the exponential growth of digital data. They consist of metal ions coordinated by organic ligands, allowing their properties to be tuned by chemical design [1,2]. Their quantum spin states can be probed by electron paramagnetic resonance (EPR), a technique that will be introduced in this lecture. Among molecular magnetic materials are single-molecule magnets (SMMs), which exemplify how memory storage can be reduced from large ferromagnetic domains to the molecular scale, creating nearly zero-dimensional magnetic systems with long relaxation times. I will show how EPR reveals the magnetic anisotropy that underlies this behavior, using a Co-based SMM studied in my group as an example [3]. Beyond single molecules, arrays of weakly coupled spins can be engineered to respond to external stimuli and form controllable entangled states, which are relevant for quantum sensing and information processing [4]. Finally, I will discuss how molecular spins can function as robust quantum bits through “clock transitions” [5], which enhance spin lifetimes by protecting them against magnetic and electric noise. References [1] Gaita-Ariño, A., Luis, F., Hill, S., Coronado, E.: Molecular spins for quantum computation, Nature Chemistry, 11 (2019), 301-309. [2] Chiesa, A., Santini, P., Garlatti, E., Luis, F., Carretta, S.: Molecular nanomagnets: a viable path toward quantum information processing?, Reports on Progress in Physics, 87 (2024), 034501. [3] Malinová, N., Jurákova, J., Brachňaková, B., Midlíková, J.D., Čižmár, E., Santana, V.T., Herchel, R., Orlita, M., Mohelský, I., Moncol, I., Neugebauer, P. and Šalitroš, I.: Magnetization Slow Dynamics in Mononuclear Co(II) Field-Induced Single-Molecule Magnet, Crystal Growth and Design, 23(4) (2023), 2430-2441. [4] Santana, V.T., Sartoris, R.P., Calvo, R.: Quantum behavior of multiple monomeric arrays of spin ½, Physical Review B, 112 (2025), 014445. [5] Shiddiq, M., Komijani, D., Duan, Y., Gaita-Ariño, A., Coronado, E., Hill, S.: Enhancing coherence in molecular spin qubits via atomic clock transition, Nature, 81 (2016), 348-351.

Abstract Molecular magnetic materials offer promising platforms for data storage and quantum bits, which are key technologies to address current societal challenges of computational power and the exponential growth of digital data. They consist of metal ions coordinated by organic ligands, allowing their properties to be tuned by chemical design [1,2]. Their quantum spin states can be probed by electron paramagnetic resonance (EPR), a technique that will be introduced in this lecture. Among molecular magnetic materials are single-molecule magnets (SMMs), which exemplify how memory storage can be reduced from large ferromagnetic domains to the molecular scale, creating nearly zero-dimensional magnetic systems with long relaxation times. I will show how EPR reveals the magnetic anisotropy that underlies this behavior, using a Co-based SMM studied in my group as an example [3]. Beyond single molecules, arrays of weakly coupled spins can be engineered to respond to external stimuli and form controllable entangled states, which are relevant for quantum sensing and information processing [4]. Finally, I will discuss how molecular spins can function as robust quantum bits through “clock transitions” [5], which enhance spin lifetimes by protecting them against magnetic and electric noise. References [1] Gaita-Ariño, A., Luis, F., Hill, S., Coronado, E.: Molecular spins for quantum computation, Nature Chemistry, 11 (2019), 301-309. [2] Chiesa, A., Santini, P., Garlatti, E., Luis, F., Carretta, S.: Molecular nanomagnets: a viable path toward quantum information processing?, Reports on Progress in Physics, 87 (2024), 034501. [3] Malinová, N., Jurákova, J., Brachňaková, B., Midlíková, J.D., Čižmár, E., Santana, V.T., Herchel, R., Orlita, M., Mohelský, I., Moncol, I., Neugebauer, P. and Šalitroš, I.: Magnetization Slow Dynamics in Mononuclear Co(II) Field-Induced Single-Molecule Magnet, Crystal Growth and Design, 23(4) (2023), 2430-2441. [4] Santana, V.T., Sartoris, R.P., Calvo, R.: Quantum behavior of multiple monomeric arrays of spin ½, Physical Review B, 112 (2025), 014445. [5] Shiddiq, M., Komijani, D., Duan, Y., Gaita-Ariño, A., Coronado, E., Hill, S.: Enhancing coherence in molecular spin qubits via atomic clock transition, Nature, 81 (2016), 348-351.

SANTANA, V.

24.10.2025

978-80-214-6369-1

Abstract proceedings, International Flash conference IMAPS - Czech and Slovak chapter

81

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