Testing gravity with cold-atom interferometers

被引：136

作者：

Biedermann, G. W. ^{[1
]}

Wu, X. ^{[1
]}

Deslauriers, L. ^{[1
]}

Roy, S. ^{[1
]}

Mahadeswaraswamy, C. ^{[1
]}

Kasevich, M. A. ^{[1
]}

机构：

[1] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW A | 2015年 / 91卷 / 03期

关键词：

CONSTANT; LAW;

D O I：

10.1103/PhysRevA.91.033629

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a horizontal gravity gradiometer atom interferometer for precision gravitational tests. The horizontal configuration is superior for maximizing the inertial signal in the atom interferometer from a nearby proof mass. In our device, we have suppressed spurious noise associated with the horizonal configuration to achieve a differential acceleration sensitivity of 4.2x10(-9) g/root Hz over a 70-cm baseline or 3.0x10(-9) g/root Hz inferred per accelerometer. Using the performance of this instrument, we characterize the results of possible future gravitational tests. We demonstrate a statistical uncertainty of 3x10(-4) for a proof-of-concept measurement of the gravitational constant that is competitive with the present limit of 1.2x10(-4) using other techniques. From this measurement, we provide a statistical constraint on a Yukawa-type fifth force at 8x10(-3) near the poorly known length scale of 10 cm. Limits approaching 10(-5) appear feasible. We discuss improvements that can enable uncertainties falling well below 10(-5) for both experiments.

引用

页数：10

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