Efectul unei descoperi: crearea calculatoarelor de tip cuantic în baza moleculei magnetice

2008-08-11

Recently a discovery that could prove to be a milestone on the road to the development of a quantum computer has been made by corr.- member of the Academy of Sciences of Moldova, Prof. Boris S. Tsukerblat in tight interdisciplinary collaboration with the researchers from the Bielefeld University (Bielefeld, Germany) and the Institut Neel (Grenoble, France). The article, “Quantum oscillations in a molecular magnet,” published by these researchers in the journal “Nature” describes unprecedented results obtained for the magnetic molecule comprising 15 vanadium atoms (in the IV oxidation state), attendant oxygens and organic ligands. The researchers have shown that this molecule can act as a carrier of quantum information. They found that the prime source of decoherence is the ever-present nuclear spins associated with the vanadium nuclei in the structure. Until now it has not been clear whether the quantum spin states of the molecular magnets are sufficiently long-lived to permit useful computation, but this new work suggests that they are. The authors observed pronounced quantum oscillations between the spin systems of the molecular magnet, consistent with long-lived quantum coherence. They also outlined a scheme by which, through careful material design, these properties could be harnessed in a practical context. This discovery is undoubtedly of primary importance for future nanotechnological development.