\documentclass{beamer}
\usepackage[latin1]{inputenc}
\usetheme{Warsaw}
\usepackage[english]{babel}
\usepackage{lmodern}
\usepackage[T1]{fontenc}
\usepackage{array}
\usepackage{graphicx}
\usepackage{multirow}
\usepackage[font=scriptsize,format=plain,justification=centering,labelformat=empty]{caption}
\usepackage{textcomp}
\usepackage{animate}
\title[Bose-Einstein Condensates and Superfluidity]{Bose-Einstein Condensates and Superfluidity}
\author{Pablo Ramos and Alessandro Genova}
\institute{Rutgers University}
\date{December 17, 2013}
\begin{document}
\begin{frame}
\titlepage
\end{frame}
\begin{frame}
\frametitle{Table of Contents}
\tableofcontents
\end{frame}
\section{Introduction}
\begin{frame}
\frametitle{What is a Bose-Einstein Condensate ($BEC$)}
\begin{columns}
\begin{column}{0.6\textwidth}
\begin{enumerate}
\item Collection of bosons (particles integer spin) at temperatures near to 0 \ \textdegree K
\item If the system is describe by $n_i=\frac{g_i}{e^{(\epsilon_i-\mu)/kT}+1}$
\begin{itemize}
\item Particles collapse $\Rightarrow$ Lowest quantum state
\item Quantum effects become apparent on a macroscopic scale.
\end{itemize}
\item Fritz London proposed BEC as a mechanism for superfluidity in 4He and superconductivity.
\end{enumerate}
\end{column}
\end{columns}
\end{frame}
\begin{frame}
\frametitle{Experimental evidence of BEC}
\begin{columns}
\begin{column}{0.6\textwidth}
\begin{itemize}
\item Kapitsa, Allen and Misener discovered He-4 $\Rightarrow$ superfluid, at $T < 2.17$ \textdegree K ($\lambda$ point).
\item First "pure" $BEC$ was created by Cornell and Wieman $\sim$ dilute vapor $\sim 2000$ Rb-87 atoms $T < 170 \ nK$.
\item $BEC$ applies to quasiparticles (solids). A magnon in an antiferromagnet (S=1)-Bose–Einstein statistics.
\end{itemize}
\end{column}
\begin{column}
\begin{center}
\includegraphics[width=0.6\textwidth]{pictures/BEC1.jpg}
\end{center}
\end{column}
\end{columns}
\end{frame}
\end{document}
答案1
发布代码的第二个大框架中的第二个column环境缺少宽度参数。这是一个提供了宽度的简化版本：
\documentclass{beamer}
\begin{document}
\begin{frame}
\frametitle{Experimental evidence of BEC}
\begin{columns}
\begin{column}{0.6\textwidth}
\begin{itemize}
\item Kapitsa, Allen and Misener discovered He-4 $\Rightarrow$ superfluid, at $T < 2.17$ K ($\lambda$ point).
\item First "pure" $BEC$ was created by Cornell and Wieman $\sim$ dilute vapor $\sim 2000$ Rb-87 atoms $T < 170 \ nK$.
\item $BEC$ applies to quasiparticles (solids). A magnon in an antiferromagnet (S=1)-Bose–Einstein statistics.
\end{itemize}
\end{column}
\begin{column}{0.4\textwidth}
\begin{center}
Test text for the second column.
\end{center}
\end{column}
\end{columns}
\end{frame}
\end{document}