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%%%    Sample abstract for CQS 2025                                    
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\title{Theory of Superconductivity}

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\index{J. Bardeen}
\index{L. N. Cooper}
\index{J. R. Schrieffer}

\author{J. Bardeen$^1$, L. N. Cooper$^1$, J. R. Schrieffer$^{1,2}$}
\affiliation{1~Department of Physics, University of Illinois, Urbana, Illinois \\
             2~Department of Theoretica Physics, University of Birmingham, Birmingham, England  }

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\begin{abstract}
Enter abstract text in the following lines.
A theory of superconductivity is presented,
based on the fact that the interaction between
electrons resulting from virtual exchange of phonons
is attractive when the energy difference between the
electrons states involved is less than the phonon energy, $\hbar \omega$ [1].
It is favorable to form a superconducting phase when
this attractive interaction dominates the repulsive
screened Coulomb interaction. The normal phase is described
by the Bloch individual-particle model.
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%   \caption{Fig.~1:  Energy gap for single-particle-like excitations  versus temperature.}
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1.  H. Frohlich, Phys. Rev. {\bf  79}, 845 (1950). \newline
2.  L. N. Cooper, Phys. Rev. {\bf 104}, 1189 (1956).

\end{abstract}

