Complex Chemical Potential: Signature Of Decay In A Bose-Einstein Condensate
PHYSICAL REVIEW LETTERS(2005)
摘要
We explore the zero-temperature statics of an atomic Bose-Einstein condensate in which a Feshbach resonance creates a coupling to a second condensate component of quasibound molecules. Using a variational procedure to find the equation of state, the appearance of this binding is manifest in a collapsing ground state, where only the molecular condensate is present up to some critical density. Further, an excited state is seen to reproduce the usual low-density atomic condensate behavior in this system, but the molecular component is found to produce a coherent, many-body decay, quantified by the imaginary part of the chemical potential. Most importantly, the unique decay rate dependencies on density (similar to rho(3/2)) and on scattering length (similar to a(5/2)) can be measured in experimental tests of this result.
更多查看译文
关键词
calculus of variation,decay rate,variational method,excited states,thermodynamics,feshbach resonance,equation of state,quantum mechanics,bose einstein condensate,chemical potential,ground state
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要