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研究两维轴对称有限深势阱中BEC的稳定性，利用变分法分别讨论了系统的基态和激发态特性。研究表明系统存在塌缩态、束缚态和扩散态三种状态，并计算出系统状态发生变化的耦合常数的两个临界值，发现势阱的形状与系统的稳定性紧密相关。同时在激发态下进一步讨论了原子间相互作用发生周期性调制的BEC的动力学特性，分析发现有限深势阱中BEC的塌缩可以通过周期性调制散射长度来控制。本文最后讨论了涡旋态下BEC的稳定性，...
Finite dimensional global and exponential attractors for a coupled time-dependent Ginzburg-Landau equations for atomic Fermi gases near the BCS-BEC crossover
Finite dimensional global exponential attractors
2010/11/9
We study a coupled nonlinear evolution system arising from the Ginzburg-Landau theory for atomic Fermi gases near the BCS-BEC crossover. First, we prove that the initial boundary value problem genera...
Performance Analysis and Design of Two Edge Type LDPC Codes for the BEC Wiretap Channel
Performance Analysis Design of Two Edge Type LDPC Codes BEC Wiretap Channel
2010/12/10
We consider transmission over a wiretap channel where both the main channel and the wiretapper’s channel are Binary Erasure Channels (BEC).
Optimized IR-HARQ Schemes Based on Punctured LDPC Codes over the BEC
Optimized IR-HARQ Schemes Based Punctured LDPC Codes BEC
2010/12/6
We study incremental redundancy hybrid ARQ (IR-HARQ) schemes based on punctured, finite-length, LDPC codes. The transmission is assumed to take place over time varying binary erasure channels, such as...