A loop-quantum-gravity-inspired phenomenological model of stellar collapse resolves central and shell-crossing singularities via local quantum repulsion, resulting in a stable outgoing solitary matter wave that ejects the entire stellar mass as a fuzzy-nova.
Why are the effective equations of loop quantum cosmology so accurate?
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abstract
We point out that the relative Heisenberg uncertainty relations vanish for non-compact spaces in homogeneous loop quantum cosmology. As a consequence, for sharply peaked states quantum fluctuations in the scale factor never become important, even near the bounce point. This shows why quantum back-reaction effects remain negligible and explains the surprising accuracy of the effective equations in describing the dynamics of sharply peaked wave packets. This also underlines the fact that minisuperspace models ---where it is global variables that are quantized--- do not capture the local quantum fluctuations of the geometry.
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Fuzzy-novae
A loop-quantum-gravity-inspired phenomenological model of stellar collapse resolves central and shell-crossing singularities via local quantum repulsion, resulting in a stable outgoing solitary matter wave that ejects the entire stellar mass as a fuzzy-nova.