Design of molecular spin qubits based on polyoxometalates

Eugenio Coronado, José Jaime Baldoví, Alejandro Gaita, Helena Prima

Instituto de Ciencia Molecular (ICMol), Universidad de Valencia

Chemistry provides nice examples of molecular nanomagnets showing quantum effects in the solid state. Still, a great challenge is the manipulation of the spins in these molecules for a sufficiently long time. In terms of quantum computing, this means the preservation of quantum coherence, i.e. all the information on the wave function, during the application of many quantum gate operations. This is a daunting task, but fortunately chemistry can provide the basics for the rational design and optimization of the building blocks with the aimed quantum behavior.

Among these molecular building blocks, magnetic polyoxometalates (POMs) combine a rich magnetochemistry with an arbitrarily low abundance of nuclear spins [1]. Here we will show that in these molecular metal oxides a high coherence can be achieved by chemically and structurally minimizing the sources of decoherence [2,3]. We will show the excellent potential of these molecules not only for the storage of quantum information but even for the realization of quantum algorithms [4].

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[2] M.J. Martínez-Pérez, S. Cardona-Serra, C. Schlegel, F. Moro, P. J. Alonso, H. Prima-García, J. M. Clemente-Juan, M. Evangelisti, A. Gaita-Ariño, J. Sesé, J. van Slageren, E. Coronado and F. Luis, Phys. Rev. Lett., 2012, 108, 247213

[3] J. J. Baldoví, S. Cardona-Serra, J. M. Clemente-Juan, E. Coronado, A. Gaita-Ariño and A. Palii, Inorg. Chem., 2012, 51, 12565–12574

[4] J. J. Baldovi, S. Cardona-Serra, J. M. Clemente-Juan, E. Coronado, A. Gaita-Arino, H. Prima-Garcia, ChemComm., 2013, 49, 8922-8924