Comment on "Uncertainty in measurements of distance"

Details Comment on "Uncertainty in measurements of distance" Comment on "Uncertainty in measurements of distance"

2002-09-06

arxiv.org/abs/gr-qc/0209021v1

Class.Quant.Grav. 20 (2003) 393

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, aastex

Scientific paper

10.1088/0264-9381/20/2/311

We have argued that quantum mechanics and general relativity give a lower bound $\delta l \gtrsim l^{1/3} l_P^{2/3}$ on the measurement uncertainty of any distance $l$ much greater than the Planck length $l_P$. Recently Baez and Olson have claimed that one can go below this bound by attaching the measuring device to a massive elastic rod. Here we refute their claim. We also reiterate (and invite our critics to ponder on) the intimate relationship and consistency between black hole physics (including the holographic principle) and our bound on distance measurements.

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