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We realize that this squeezing is preserved as the cloud expands to a roughly 200 μm radius and drops approximately 300 μm in free-space. Ramsey spectroscopy with 240 000 atoms at a 3.6 ms Ramsey time results in a single-shot fractional regularity security of 8.4(0.2)×10^, 3.8(0.2) dB underneath the quantum projection restriction. The sensitiveness and security are limited by the technical noise when you look at the fluorescence recognition protocol together with microwave oven system