Non-singular collapse scenario from generalized uncertainty principle.

We study the implications of generalized uncertainty principle (GUP) on the process of gravitational collapse of a spherically symmetric homogeneous and isotropic perfect fluid with a linear equation of state. We show that GUP effects can alter the collapse dynamics and consequently a nonsingular scenario is developed in the sense that at the end of the contracting phase a bounce emerges at a minimum radius after which an expanding phase begins. Hence, in comparison with the singular models where the collapse terminates in a spacetime singularity, the GUP effects provide a setting in which the singular event is replaced by a nonsingular bounce. We consider the GUP-modified collapse model for three types of equation of state parameters representing, radiation, dust and cosmic string fluids. The exact and numerical solutions for GUP-deformed collapse setting show that there exists a minimum initial radius for the collapsing cloud below which, the apparent horizon will fail to form and hence, the bounce event can be visible to the observers in the universe. [ABSTRACT FROM AUTHOR]