Universality in Efimov associated tetramers in 4He

Understand

We calculated, using seven realistic 4He-4He potentials in the literature, the Efimov spectra of the 4He trimer and tetramer and analyzed the universality of the systems.

• The three-(four-)body Schroedinger equations were solved fully nonadiabatically with the high-precision calculation method employed in our previous work on the 4He trimer and tetramer [Phys.
• Rev.
• A 85, 022502 (2012); 85, 062505 (2012)].