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 E-Mail IMAGE: MIT and Harvard researchers have studied how elementary units of magnetism, called spins (the black arrows), move around and interact with other spins, in a chain of single atoms (the. view more  Credit: Courtesy of the researchers A new study illuminates surprising choreography among spinning atoms. In a paper appearing in the journal Nature, researchers from MIT and Harvard University reveal how magnetic forces at the quantum, atomic scale affect how atoms orient their spins. In experiments with ultracold lithium atoms, the researchers observed different ways in which the spins of the atoms evolve. Like tippy ballerinas pirouetting back to upright positions, the spinning atoms return to an equilibrium orientation in a way that depends on the magnetic forces between individual atoms. For example, the atoms can spin into equilibrium in an extremely fast, ballistic fashion or in a slower, more diffuse pattern.

Wolfgang ketterleJennifer chuJohnd arthurIvana dimitrovaEugene demlerJohn gillaspyPaul niklas jepsenResearch laboratory of electronicsDepartment of defenseInstitute department of physicsDivision of physicsNational science foundationNews officeHarvard universityBetty moore foundationStanford university