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arXiv 0907.3411quant-phcond-mat.dis-nnnlin.CDphysics.optics
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用原子物质波观测Anderson金属-绝缘体相变:理论与实验

Observation of the Anderson Metal-Insulator Transition with Atomic Matter Waves: Theory and Experiment

Gabriel Lemarié, Julien Chabé, Pascal Szriftgiser, Jean-Claude Garreau, Benoît Grémaud, Dominique Delande

摘要:

使用冷原子气体暴露于激光脉冲-实现混沌准周期踢转子与三个无公度频率-我们研究的实验和理论的安德森金属-绝缘体转变在三维空间。对原子波函数的灵敏测量和有限尺寸标度技术的使用使得明确地证明量子相变的存在和测量其临界指数成为可能。通过适当考虑系统校正单参数标度,我们显示的普遍性的临界指数$ν=1.59\pm0.01,$被发现是等于一个先前计算的安德森模型。

英文摘要:

Using a cold atomic gas exposed to laser pulses -- a realization of the chaotic quasiperiodic kicked rotor with three incommensurate frequencies -- we study experimentally and theoretically the Anderson metal-insulator transition in three dimensions. Sensitive measurements of the atomic wavefunction and the use of finite-size scaling techniques make it possible to unambiguously demonstrate the existence of a quantum phase transition and to measure its critical exponents. By taking proper account of systematic corrections to one-parameter scaling, we show the universality of the critical exponent $ν=1.59\pm0.01,$ which is found to be equal to the one previously computed for the Anderson model.

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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