Figure 4 : Upper limit on .

From: Quantum test of the equivalence principle for atoms in coherent superposition of internal energy states

Figure 4

Parameter A as a function of the RMS noise measured on simulated data points with respect to the best-fitting ellipse. Our ellipses show an RMS noise of 0.0032, corresponding to an upper bound on of 5 × 10−8. The error bars represent the standard error on the RMS: , where N is the number of data points on our ellipses.