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arXiv 0709.4320quant-phcond-mat.mes-hallcond-mat.othercond-mat.stat-mechnlin.CDphysics.optics
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原子物质波中Anderson跃迁的实验观察

Experimental observation of the Anderson transition with atomic matter waves

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

摘要:

我们在实验上实现了一个原子-光学量子混沌系统--准周期被踢转子,它等价于一个三维无序系统,使我们能够演示Anderson金属-绝缘体相变。原子波函数动力学的灵敏测量和有限尺寸标度技术的使用使得有可能提取临界参数和临界指数的过渡,这是在良好的协议与数值模拟的3D安德森模型中获得的值。

英文摘要:

We realize experimentally an atom-optics quantum chaotic system, the quasiperiodic kicked rotor, which is equivalent to a 3D disordered system, that allow us to demonstrate the Anderson metal-insulator transition. Sensitive measurements of the atomic wavefunction dynamics and the use of finite-size scaling techniques make it possible to extract both the critical parameters and the critical exponent of the transition, which is in good agreement with the value obtained in numerical simulations of the 3D Anderson model.

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