List of Figures
Heisenberg’s microscope. A photon moving along the -axis scatters off a probe within an interaction region of radius and is detected by a microscope (indicated by a lens and screen) with opening angle .
The length of a string is not the same as its average extension. The lengths of strings in the groundstate were studied in .
Spacetime uncertainty (red, solid) vs uncertainty from spherical black holes (blue, dotted) in dimensions, for (left) and (right). After , Figure 1. Below the bound from spacetime uncertainty yet above the black-hole bound that hides short-distance physics (shaded region), the concept of classical geometry becomes meaningless.
Cross section for scattering of two scalar particles by graviton exchange with and without running Planck mass, in units of the low-energy Planck mass . The dot-dashed (purple) line depicts the case without asymptotic safety; the continuous (blue) and dashed (grey) line take into account the running of the Planck mass, for two different values of the fixed point, and respectively. Figure from ; reproduced with permission from IOP.