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Should I Stay or Should I Go? Switzerland and the European Economic and Monetary Integration Process
( Guillaume Vallet ) 세종대학교 경제통합연구소 2012 Journal of Economic Integration Vol.27 No.3
The case of Switzerland appears to be unique with regard to the European Economic and Monetary Integration Process which began in 1957: even though the country has cultivated close ties and growing links with the European Union (EU) over time, it does not desire full membership. If this situation of "non-adhesive integration" seems to be beneficial for Switzerland in many respects, it also presents some constraints. Such a position leads to a national dilemma for Switzerland with regard to the EU: should I stay or should I go? Thus we shall examine in this article the particularities, the advantages, and the constraints of the Swiss stance.
Test of Special Relativity Using a Fiber Network of Optical Clocks
Delva, P.,Lodewyck, J.,Bilicki, S.,Bookjans, E.,Vallet, G.,Le Targat, R.,Pottie, P.-E.,Guerlin, C.,Meynadier, F.,Le Poncin-Lafitte, C.,Lopez, O.,Amy-Klein, A.,Lee, W.-K.,Quintin, N.,Lisdat, C.,Al-Maso American Physical Society 2017 Physical Review Letters Vol.118 No.22
<P>Phase compensated optical fiber links enable high accuracy atomic clocks separated by thousands of kilometers to be compared with unprecedented statistical resolution. By searching for a daily variation of the frequency difference between four strontium optical lattice clocks in different locations throughout Europe connected by such links, we improve upon previous tests of time dilation predicted by special relativity. We obtain a constraint on the Robertson-Mansouri-Sexl parameter |alpha| <= 1.1 x 10(-8), quantifying a violation of time dilation, thus improving by a factor of around 2 the best known constraint obtained with Ives-Stilwell type experiments, and by 2 orders of magnitude the best constraint obtained by comparing atomic clocks. This work is the first of a new generation of tests of fundamental physics using optical clocks and fiber links. As clocks improve, and as fiber links are routinely operated, we expect that the tests initiated in this Letter will improve by orders of magnitude in the near future.</P>