New breakthrough in quantum technology: spin states can be controlled by electric fields
Chemists at Friedrich Schiller University Jena and the University of Florence have made a significant advance in quantum technology. They have developed a copper complex that serves as a potential qubit for quantum computers and whose spin state can be directly controlled by electric fields for the first time.
This was achieved through targeted manipulation of the interactions in a geometrically frustrated spin system, in which three spins in a triangular arrangement exhibit a particular spin chirality. An applied electric field changes the coupling constant across the ligands of the molecule, which influences the spin interaction. The results, published in “Nature Communications”, were investigated using electron spin resonance, which reveals spin-electric effects and their anisotropy.

The approach enables more precise, faster and more energy-efficient qubit systems, as electric fields are easier to control than magnetic fields. The findings open up new perspectives for customized molecules in more powerful quantum computers.
Original Paper:
Electric control of magnetic exchange in a molecular spin triangle | Nature Communications
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