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arXiv 0811.1737cond-mat.str-elcond-mat.quant-gas
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光晶格中一种可能的电荷近藤效应

Towards A Possible Charge-Kondo effect in Optical Lattices

M. S. Laad, L. Craco, A. Taraphder

摘要:

近藤效应支撑了$d$和$f$能带化合物物理学的大量最新发展。虽然它的{ \it电荷}类似物在固体中是罕见的,但最近对电荷近藤效应的观察以及随之而来的超导T $_c$的上升鼓励了对其他可获得系统的探索。受任意调节光晶格中电子间相互作用的{ \it符号}的可能性的启发,我们研究了难以捉摸的{ \it电荷近藤液体}(CKL)态出现的条件.我们认为,结合费什巴赫共振和顺序控制的激光脉冲可以产生CKL。我们表明,CKL是{ \it从来没有}一个稳定的基态,只出现在有序的基态不稳定。最后,我们讨论有趣的类比与核物质。

英文摘要:

The Kondo effect underpins a large body of recent developments in the physics of $d$- and $f$-band compounds. Although its {\it charge} analog is a rarity in solids, the recent observations of the charge Kondo effect and the consequent rise in superconducting T$_c$ encourage a search for other accessible systems. Motivated by the possibility of wilfully tuning the {\it sign} of the inter-electronic interaction in optical lattices, we study conditions for the elusive {\it charge Kondo liquid} (CKL) state to manifest. We propose that a combination of Feshbach resonances and sequentially controlled laser pulses may produce the CKL. We show that the CKL is {\it never} a stable ground state, appearing only when the ordered ground states are destabilized. Finally, we discuss interesting analogies with nuclear matter.

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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