The three-body system is the epitome of a problem that resists a solution. But some specific cases of three interacting objects have been solved analytically. One example is three bosons. Under certain conditions, interactions between the bosons lead to a solvable three-body bound state called a trimer. New theoretical work by three separate groups describes a previously unidentified trimer in a three-boson system confined to one dimension. Experimental verification of this bound-state prediction could be done using cold atoms in a linear trap.
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