This thesis demonstrates a full Mach–Zehnder interferometer with interacting Bose–Einstein condensates confined on an atom chip. It relies on the coherent m

Since atom interferometers were first realized about 20 years ago, atom interferometry has had many applications in basic and applied science, and has been used

Interferometry, the most precise measurement technique known today, exploits the wave-like nature of the atoms or photons in the interferometer. As expected fro

The relaxation of isolated quantum many-body systems is a major unsolved problem of modern physics, which is connected to many fundamental questions. However, r

This thesis outlines the main experimental results of a Bose-Einstein condensate(BEC) interferometer and the finite temperature coherence of elongated BECs. Col