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Equation 6 · Part 1 · The Oldest Quantum-Gravity Experiment Is a Neutron Falling

Symbol z_0

z0=5.87z_0 = 5.87
z0z_0

What this part means

z0z_0 is part of the quantity the equation computes from the expression on the right.

Its job in the formula

z0z_0 is part of the quantity the equation computes from the expression on the right.

The passage around this formula

…of the original measurement, using a position-sensitive track detector to scan the standing-wave density directly above the mirror rather than only the transmitted flux, pinned down the characteristic length scale z0z_0 = 5.87 micrometres and reported the same Airy-zero ladder to several figures [ 2 ] . Feed that length scale and the lowest Airy zero into the formula above and the ground state comes out to 1.407 picoelectronvolts — a fantastically small number by nuclear or even atomic standards, corresponding…

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