Reflectivity for the static potential as a function of <em>x</em><sub>0</sub>

<p><strong>Figure 1.</strong> Reflectivity for the static potential as a function of <em>x</em><sub>0</sub>. Results obtained by integrating the time-dependent Schrödinger equation (filled circles) and by solving the stationary Schrödinger equation (dashed line) are shown. The solid line shows the averages calculated between subsequent maxima by double-geometric averaging.</p> <p><strong>Abstract</strong></p> <p>We describe an experimentally realistic situation of the quantum reflection of helium atoms from an oscillating surface. The temporal modulation of the potential induces clear sidebands in the reflection probability as a function of momentum. These sidebands could be exploited to slow down atoms and molecules in the experiment.</p>