Science Daily  November 9, 2018 While a single spin is easily disrupted, a coupled-spin system can resist decoherence by using a subspace of states that is immune to magnetic field fluctuations. An international team of researchers (South Korea, USA – industry) engineered the magnetic interactions between the electron spins of two spin-1/2 atoms to create a “clock transition” and thus enhance their spin coherence. To construct and electrically access the desired spin structures, they used atom manipulation combined with electron spin resonance. They showed that a two-level system composed of a singlet state and a triplet state is insensitive to […]