Crucial tests of macrorealist and semiclassical gravity models with freely falling mesoscopic nanospheres

Crucial tests of macrorealist and semiclassical gravity models with freely falling mesoscopic nanospheres
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自由落体介观纳米球宏观现实主义和半经典重力模型的关键测试

DOI:
10.1103/physreva.93.062102
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发表时间:
2014
期刊:
影响因子:
2.9
通讯作者:
R. Willox
R. Willox
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
S. Colin;T. Durt;R. Willox

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最近,已经提出了几个建议,以测试在介观制度的量子叠加原理。这些测试中的大多数包括对由于退相干而导致的干扰损失的仔细测量。在这里,我们考虑的是自由下落的纳米球的位置分布。我们深入研究这种传播的依赖性在存在退相干(异国情调和nonexotic)的自引力。我们表明,自引力的影响是强大的弱退相干的存在下,并量化这种鲁棒性通过引入一个参数,临界退相干,旨在估计临界值以上的自引力被淹没的退相干。我们还强调了自由落体实验退相干的灵敏度的初始波包的传播所发挥的关键作用。
Recently, several proposals have been made to test the quantum superposition principle in the mesoscopic regime. Most of these tests consist of a careful measurement of the loss of interference due to decoherence. Here we consider, instead, the spread in position of a freely falling nanosphere. We study in depth the dependence of this spread on self-gravity in the presence of decoherence (exotic and nonexotic). We show that the influence of self-gravity is robust in the presence of weak decoherence, and quantify this robustness by introducing a parameter, the critical decoherence, aimed at estimating the critical value above which self-gravity is overwhelmed by decoherence. We also emphasize the crucial role played by the spread of the initial wave packet for the sensitivity of free-fall experiments to decoherence.
DOI: 10.1103/physrevlett.113.020405
发表时间: 2014-07-10
影响因子: 8.6
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