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arXiv 0903.3030cond-mat.stat-mech
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囚禁强相互作用费米气体的临界行为

Critical Behaviour in Trapped Strongly Interacting Fermi Gases

E. Taylor

摘要:

我们调查的Ginzburg临界区的宽度和实验签名的临界行为在强烈相互作用的费米气体接近么正性,其中的s-波散射长度发散。尽管临界区的宽度是统一的,但在被困气体的体相热力学中,临界行为的证据被它们的不均匀性强烈抑制。例如,在高于$T_{\mathrm{c}}$的降低温度$t = (T-T_{\mathrm{c}})/T_{\mathrm{c}}$中,谐波约束气体的比热是\textit{linear}。我们还讨论了从密度分布的测量中观察局部可压缩性的临界行为的前景。

英文摘要:

We investigate the width of the Ginzburg critical region and experimental signatures of critical behavior in strongly interacting trapped Fermi gases close to unitarity, where the s-wave scattering length diverges. Despite the fact that the width of the critical region is of the order unity, evidence of critical behavior in the bulk thermodynamics of trapped gases is strongly suppressed by their inhomogeneity. The specific heat of a harmonically confined gas, for instance, is \textit{linear} in the reduced temperature $t = (T-T_{\mathrm{c}})/T_{\mathrm{c}}$ above $T_{\mathrm{c}}$. We also discuss the prospects of observing critical behavior in the local compressibility from measurements of the density profile.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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