%0 Journal Article %1 Pollack2009Universality %A Pollack, Scott E. %A Dries, Daniel %A Hulet, Randall G. %D 2009 %I American Association for the Advancement of Science %J Science %K bose\_gas, experiment, strongly\_interacting %N 5960 %P 1683--1685 %R 10.1126/science.1182840 %T Universality in Three- and Four-Body Bound States of Ultracold Atoms %U http://dx.doi.org/10.1126/science.1182840 %V 326 %X Under certain circumstances, three or more interacting particles may form bound states. Although the general few-body problem is not analytically solvable, the so-called Efimov trimers appear for a system of three particles with resonant two-body interactions. The binding energies of these trimers are predicted to be universally connected to each other, independent of the microscopic details of the interaction. By exploiting a Feshbach resonance to widely tune the interactions between trapped ultracold lithium atoms, we find evidence for two universally connected Efimov trimers and their associated four-body bound states. A total of 11 precisely determined three- and four-body features are found in the inelastic-loss spectrum. Their relative locations on either side of the resonance agree well with universal theory, whereas a systematic deviation from universality is found when comparing features across the resonance. 10.1126/science.1182840

@article{Pollack2009Universality, abstract = {Under certain circumstances, three or more interacting particles may form bound states. Although the general few-body problem is not analytically solvable, the so-called Efimov trimers appear for a system of three particles with resonant two-body interactions. The binding energies of these trimers are predicted to be universally connected to each other, independent of the microscopic details of the interaction. By exploiting a Feshbach resonance to widely tune the interactions between trapped ultracold lithium atoms, we find evidence for two universally connected Efimov trimers and their associated four-body bound states. A total of 11 precisely determined three- and four-body features are found in the inelastic-loss spectrum. Their relative locations on either side of the resonance agree well with universal theory, whereas a systematic deviation from universality is found when comparing features across the resonance. 10.1126/science.1182840}, added-at = {2014-01-09T15:14:33.000+0100}, author = {Pollack, Scott E. and Dries, Daniel and Hulet, Randall G.}, biburl = {https://www.bibsonomy.org/bibtex/29b6d8f60d65ff8f0ad744042d9799917/jaspervh}, citeulike-article-id = {6405826}, citeulike-linkout-0 = {http://dx.doi.org/10.1126/science.1182840}, citeulike-linkout-1 = {http://www.sciencemag.org/content/326/5960/1683.abstract}, citeulike-linkout-2 = {http://www.sciencemag.org/content/326/5960/1683.full.pdf}, citeulike-linkout-3 = {http://www.sciencemag.org/cgi/content/abstract/326/5960/1683}, citeulike-linkout-4 = {http://view.ncbi.nlm.nih.gov/pubmed/19965389}, citeulike-linkout-5 = {http://www.hubmed.org/display.cgi?uids=19965389}, day = 18, doi = {10.1126/science.1182840}, interhash = {55a99b60fbc5d682dde718d9cd92bf30}, intrahash = {9b6d8f60d65ff8f0ad744042d9799917}, issn = {1095-9203}, journal = {Science}, keywords = {bose\_gas, experiment, strongly\_interacting}, month = dec, number = 5960, pages = {1683--1685}, pmid = {19965389}, posted-at = {2012-01-24 15:01:51}, priority = {2}, publisher = {American Association for the Advancement of Science}, timestamp = {2014-01-09T15:14:33.000+0100}, title = {Universality in Three- and Four-Body Bound States of Ultracold Atoms}, url = {http://dx.doi.org/10.1126/science.1182840}, volume = 326, year = 2009 }