LHCのような大型ハドロンコライダー（陽子の衝突加速器）やILC（電子のリニア-コライダー加速器）
の最先端加速器テクノロジーは
究極の物理解明の道具であるが、
人口の加速器のエネルギーはたかが知れている。
そこで非加速器の工夫が期待される。
シカゴ大学／フェルミ加速器研究所の
ホーガンは大型の干渉計をつかって世界の最小単位である
プランクマス（プランク常数と基本量から次元解析で作った重さの単位）の揺らぎ
を観測しようという
大胆な構想を実行に移している。
それなら私にももっといい測定器ができるかもしれない。
；）
おまけ；
Dear D,
Gravitational interferometer to detect graviton could be
attached to xxx tube to study the Planck scale quantum fluctuation.
xxx may have a potential of great physics instrument.
See
http://backreaction.blogspot.com/2009/03/holographic-noise.html
Graviational Wave Interferometry
The idea underlying Hogan's prediction is that our world might have holographic properties, in which case not all three dimensions of our spacetime would encode really independent degrees of freedom. This conjectured property would become noticeable only at very large distances. A device that was able to measure distances in orthogonal directions at long distances and to high precision could be sensitive to this fundamental limit of encoding details, and be subject to a new kind of uncertainty. Gravitational wave interferometers provide exactly such a device. The holography would show up as noise in the detector.
Gravitational waves create distortions in our space-time that make themselves felt as tiny changes in lengths which are not the same for all three spatial dimensions. Interferometers lead a laser through a beam-splitter that splits the beam into two orthogonal directions into the “arms” of the interferometer, bounce the beam back on mirrors at the end of these arms, and compare the phases of the light when it comes back. This procedure can detect tiny deviations in the arm lengths which will change the phase shift. A common way to enhance the sensitivity of interferometers are “recycling techniques” that basically artificially increase arm lengths by reflecting the beam several times back and forth. GEO600 would be particularly sensitive to the holographic modification of quantum mechanics Hogan is proposing because the laser is reflected through both arms several times, whereas LIGO, VIRGO and TAMA use so called Fabry-Perot arms that reflect the beam in each arm separately. You find a very useful illustration of this difference between LIGO and GEO600 in Peter Shawhan's presentation, slide 19 and 2