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arXiv 0905.2717cond-mat.str-el
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$π$ -介子凝聚物理与高温铜氧化物超导体

Physics of $π$-Meson Condensation and High Temperature Cuprate Superconductors

O. P. Sushkov

摘要:

戈德斯通$π$ -介子场在核物质中凝聚的观点很早就被提出。然而,人们已经确定,正常的核密度太低,它不足以凝聚$π$ -介子。这就是为什么从未观察到$π$ -缩合的原因。最近对高温铜氧化物超导体的实验和理论研究揭示了Goldstone磁振子的凝聚,其效应完全类似于$π$凝聚。观察到了磁振子凝聚。现在很清楚,量子涨落在凝聚中起着至关重要的作用,特别是它们驱动了量子相变,在一定的费米子密度下破坏了凝聚。

英文摘要:

The idea of condensation of the Goldstone $π$-meson field in nuclear matter had been put forward a long time ago. However, it was established that the normal nuclear density is too low, it is not sufficient to condensate $π$-mesons. This is why the $π$-condensation has never been observed. Recent experimental and theoretical studies of high temperature cuprate superconductors have revealed condensation of Goldstone magnons, the effect fully analogous to the $π$-condensation. The magnon condensation has been observed. It is clear now that quantum fluctuations play a crucial role in the condensation, in particular they drive a quantum phase transition that destroys the condensate at some density of fermions.

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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