An improved measurement of the ground state tensor polarizability of Cesium atoms

We will describe a direct measurement of the ground state tensor polarizability (GSTP) of Cs using laser cooled atoms trapped in optical lattices. Precision measurement of the Cs GSTP provides a way to test third order atomic calculations, which are important for determining the weak charge from atomic parity violation measurements. We measure the GSTP by simultaneously driving transitions in two pairs of magnetic sublevels and measuring the populations in individual magnetic sublevels. This is the first GSTP measurement of the F=3 hyperfine level.  Our measurement is consistent with existing experimental and theoretical results for the F=4 hyperfine level, but its <10^-3 relative precision is approximately two orders of magnitude more precise than previous experiments or existing theory.