Friday, July 19, 2013

1307.4892 (A. I. Karasevskii)

An energy gap in the spectrum of atomic excitations systems    [PDF]

A. I. Karasevskii
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.
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