The status of experimental tests of general relativity and of theoretical frameworks for
analyzing them is reviewed and updated. Einstein's equivalence principle (EEP) is well …

Fundamental constants are a cornerstone of our physical laws. Any constant varying in
space and/or time would reflect the existence of an almost massless field that couples to …

Atomic clocks, which lock the frequency of an oscillator to the extremely stable quantized
energy levels of atoms, are essential for navigation applications such as deep space …

We stabilized the carrier-envelope phase of the pulses emitted by a femtosecond mode-
locked laser by using the powerful tools of frequency-domain laser stabilization. We …

Electromagnetic interactions play a central role in low energy physics. They are responsible
for the cohesion of atoms and molecules and they are at the origin of the emission and …

This article describes the various experimental bounds on the variation of the fundamental
constants of nature. After a discussion of the role of fundamental constants, their definition …

Nature's simplest field, the scalar field, has been the protagonist of physical theories for a
long time. Even before the publication of the theory of general relativity G. Nordström …

We report the incrementally staged design, synthesis, characterization, and operation of a
molecular machine that behaves like a nanoscale elevator. The operation of this device …

We use 6 yrs of accurate hyperfine frequency comparison data of the dual rubidium and
caesium cold atom fountain FO2 at LNE-SYRTE to search for a massive scalar dark matter …

In this paper, we study the local observational consequences of a violation of the Einstein
equivalence principle induced by models of light scalar dark matter (DM). We focus on two …