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A very interesting question that has undeservedly waited too long for its answer! I will try to address the different parts of the question one-by-one. However, excellent references are available on the subject. I can recommend Basic superfluids by T. Guenault as a simple intro to superfluidity in general, while a more difficult read An introduction to the ...


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In the context of ultracold Fermi gases, a BEC-BCS crossover means that by tuning the interaction strength (the s-wave scattering length), one goes from a BEC state to a BCS state without encountering a phase transition (thus the word "crossover"). It is also useful to know that the BEC state is a Bose-Einstein condensate of two-atom molecules, while the ...


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With a basic understanding of physical geometry we can understand this difference. A soliton is a KIND of pseudosphere created by the rotation of a tactrix, however, this particular kind of pseudosphere is harmonically generated by the negation of itself. We can say that if the natural growing pseudosphere has a one dimensional rotational property then the ...



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