Probing spin-electric transitions in a molecular exchange qubit

Electric fields represent an ideal means for controlling spins at the nanoscale and, more specifically, for manipulating protected degrees of freedom in multispin systems. Here we perform low-temperature magnetic far-IR spectroscopy on a molecular spin triangle ( Fe 3 ) and provide initial experimen...

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Bibliographic Details
Published in:Nature communications Vol. 16; no. 1; pp. 1198 - 8
Main Authors: le Mardelé, Florian, Mohelský, Ivan, Wyzula, Jan, Orlita, Milan, Turek, Philippe, Troiani, Filippo, Boudalis, Athanassios K.
Format: Journal Article
Language:English
Published: London Nature Publishing Group UK 30.01.2025
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Subjects:
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639/766/483/2802
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Chirality
Controllability
Coupling (molecular)
Dipoles
Electric fields
Electrons
Exchanging
Humanities and Social Sciences
Infrared spectroscopy
Investigations
Low temperature
multidisciplinary
Physics
Quantum Physics
Qubits (quantum computing)
Radiation
Science
Science (multidisciplinary)
Spectrum analysis
Symmetry
ISSN:2041-1723, 2041-1723
Online Access:Get full text
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Summary:Electric fields represent an ideal means for controlling spins at the nanoscale and, more specifically, for manipulating protected degrees of freedom in multispin systems. Here we perform low-temperature magnetic far-IR spectroscopy on a molecular spin triangle ( Fe 3 ) and provide initial experimental evidence suggesting spin-electric transitions in polynuclear complexes. The co-presence of electric- and magnetic-dipole transitions, allows us to estimate the spin-electric coupling. Based on spin Hamiltonian simulations of the spectra, we identify the observed transitions and introduce the concept of a generalized exchange qubit. This applies to a wide class of molecular spin triangles, and includes the scalar chirality and the partial spin sum qubits as special cases. Polynuclear magnetic molecular complexes show promise as electrically controllable spin qubits. Here the authors report evidence of spin-electric transitions in the Fe3 triangle and propose it as a generalized exchange qubit, combining characteristics of spin-chirality and partial-spin sum qubits.
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ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-025-56453-1