On the stability of atom chip interferometers

We calculate the sensitivity to changes in temperature and current for a resonant atom interferometer device based on oscillations of a cold, magnetically trapped cloud in a two wire harmonic trap. The sensitivity of the trap frequency and area enclosed are estimated for typical trap parame- ters. Based on this analysis, the frequency and area enclosed are both more sensitive to the stability of the current creating the magnetic eld than the thermal expansion of the substrate. Current experimental progress measuring the frequency stability of current atom chip devices is outlined.