通过卡西米尔力测量检测变色龙
Detecting Chameleons through Casimir Force Measurements
摘要：
强耦合变色龙场的最佳实验室约束不是来自重力本身的测试，而是来自卡西米尔力的精确测量。两个相邻物体之间的变色龙力更类似于类卡西米尔力，而不是引力：变色龙力的行为与两个物体表面之间的距离成反比，就像卡西米尔力一样。此外，重力的实验测试通常使用薄金属片来屏蔽静电力，然而由于强耦合变色龙场的存在，该片掩盖了任何可检测的信号。由于这种屏蔽，专门用来测试引力行为的实验往往无法对与物质强耦合的变色龙场施加任何约束。卡西米尔力测量不使用物理静电屏蔽，因此能够对具有强物质耦合的变色龙场的性质施加比重力测试更严格的约束。受此启发，我们进行了充分的调查的可能性，测试变色龙模型与现在和未来的Casimir实验。我们发现，目前的测量无法检测到变色龙。然而，未来的实验有很大的可能性检测或排除一整类变色龙模型。
英文摘要：
The best laboratory constraints on strongly coupled chameleon fields come not from tests of gravity per se but from precision measurements of the Casimir force. The chameleonic force between two nearby bodies is more akin to a Casimir-like force than a gravitational one: The chameleon force behaves as an inverse power of the distance of separation between the surfaces of two bodies, just as the Casimir force does. Additionally, experimental tests of gravity often employ a thin metallic sheet to shield electrostatic forces, however this sheet mask any detectable signal due to the presence of a strongly coupled chameleon field. As a result of this shielding, experiments that are designed to specifically test the behaviour of gravity are often unable to place any constraint on chameleon fields with a strong coupling to matter. Casimir force measurements do not employ a physical electrostatic shield and as such are able to put tighter constraints on the properties of chameleons fields with a strong matter coupling than tests of gravity. Motivated by this, we perform a full investigation on the possibility of testing chameleon model with both present and future Casimir experiments. We find that present days measurements are not able to detect the chameleon. However, future experiments have a strong possibility of detecting or rule out a whole class of chameleon models.
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