2013/07/18 by A. I. Karasevskiĭ, A. I. Karasevskii, Karasevskii, A. I.
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #cond-mat.other #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.1307.4892
8 pages, 2 figures
arxiv created 2013/07/18 · arxiv updated 2013/07/19
It is shown that atoms in the system can be treated as quantum particles localized in potential wells, created by atomic potentials of neighboring atoms. As a result, the state of atoms in the liquid is characterized by wave functions and the discrete energy spectrum resulting in formation of s and p - zones corresponding to the ground and excited states of helium atoms, respectively, separated by a gap. The width of the gap in system equals ~8.5 K at T=0. Formation of the gap in the energy spectrum of atomic excitations in helium systems allows us to draw the analogy between the physical mechanisms of superfluidity and classical superconductivity.