Creation of neutron spinless pairs in a superfluid liquid $^4$He and a neutron gas mixture

Details Creation of neutron spinless pairs in a superfluid liquid $^4$He and a neutron gas mixture Creation of neutron spinless pairs in a superfluid liquid $^4$He and a neutron gas mixture

2008-03-31

arxiv.org/abs/0803.4433v10

Physics

Condensed Matter

Statistical Mechanics

10 pages

Scientific paper

First, the creation of a free neutron spinless pairs is predicted in a superfluid liquid $^4$He and a neutron gas mixture. For solving the given problem, it is presented an exact solution to the model of dilute Bose gas as an extension of the Bogoliubov model, at quantity of the condensate fraction varying in the state $0\leq\frac{N_0}{N}\leq 1$, which in turn might be useful for a description of the superfluid liquid $^4$He. Due to an application of presented new model of dilute Bose gas, we prove that an appearance of atoms in the condensate is a suppressor for the collective modes as well as a creator for single-particle excitations On other hand, it is shown that the terms of the interaction between the Bogoliubov excitations (Bogoliubov phonon-roton modes) and the density modes of the neutron meditate an attractive interaction via the neutron modes, which in turn leads to a bound state on a spinless neutron pair.

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