A dissymmetric [Gd2] coordination molecular dimer hosting six addressable spin qubits

Luis, F. (Universidad de Zaragoza) ; Alonso, P.J. ; Roubeau, O. (Universidad de Zaragoza) ; Velasco, V. ; Zueco, D. (Universidad de Zaragoza) ; Aguilà, D. ; Martínez, J.I. (Universidad de Zaragoza) ; Barrios, L.A. ; Aromí, G.

Resumen: Artificial magnetic molecules can host several spin qubits, which could then implement small-scale algorithms. In order to become of practical use, such molecular spin processors need to increase the available computational space and warrant universal operations. Here, we design, synthesize and fully characterize dissymetric molecular dimers hosting either one or two Gadolinium(III) ions. The strong sensitivity of Gadolinium magnetic anisotropy to its local coordination gives rise to different zero-field splittings at each metal site. As a result, the [LaGd] and [GdLu] complexes provide realizations of distinct spin qudits with eight unequally spaced levels. In the [Gd2] dimer, these properties are combined with a Gd-Gd magnetic interaction, sufficiently strong to lift all level degeneracies, yet sufficiently weak to keep all levels within an experimentally accessible energy window. The spin Hamiltonian of this dimer allows a complete set of operations to act as a 64-dimensional all-electron spin qudit, or, equivalently, as six addressable qubits. Electron paramagnetic resonance experiments show that resonant transitions between different spin states can be coherently controlled, with coherence times TM of the order of 1 µs limited by hyperfine interactions. Coordination complexes with embedded quantum functionalities are promising building blocks for quantum computation and simulation hybrid platforms.

Idioma: Inglés

DOI: 10.1038/s42004-020-00422-w

Año: 2020

Publicado en: Communications Chemistry 3, 1 (2020), 176 [11 pp]
ISSN: 2399-3669

Factor impacto JCR: 6.581 (2020)

Categ. JCR: CHEMISTRY, MULTIDISCIPLINARY rank: 40 / 178 = 0.225 (2020) - Q1 - T1

Factor impacto SCIMAGO: 1.969 - Biochemistry (Q1) - Materials Chemistry (Q1) - Environmental Chemistry (Q1) - Chemistry (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E09-17R-Q-MAD
Financiación: info:eu-repo/grantAgreement/ES/DGA/E17-17R-PLATON
Financiación: info:eu-repo/grantAgreement/EC/FP7/258060/EU/Design and Preparation of Functional Molecules for Quantum Computing and Information Processing/FUNCMOLQIP
Financiación: info:eu-repo/grantAgreement/EC/H2020/862893/EU/Molecular spin qudits offering new hope for quantum computing/FATMOLS
Financiación: info:eu-repo/grantAgreement/ES/MICINN/CTQ2015-64486-R
Financiación: info:eu-repo/grantAgreement/ES/MICINN/CTQ2015-68370-P
Financiación: info:eu-repo/grantAgreement/ES/MICINN/MAT2017-86826-R
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PCI2018-093116
Financiación: info:eu-repo/grantAgreement/ES/MICINN/PGC2018-098630-B-I00
Financiación: info:eu-repo/grantAgreement/ES/MICINN/RTI2018-096075-B-C21
Financiación: info:eu-repo/grantAgreement/EUR/MOLSPIN-COST/CA15128
Financiación: info:eu-repo/grantAgreement/EUR/QUANTERA/SUMO

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)