# Weak cosmic censorship conjecture and black hole shadow for black hole with generalized uncertainty principle

## TL;DR

This paper derives new solutions for GUP-modified rotating black holes, analyzes their shadows, and discusses implications for testing quantum gravity effects and the weak cosmic censorship conjecture.

## Contribution

It introduces two models of GUP-rotating black holes and examines their shadows and the validity of the cosmic censorship conjecture within this framework.

## Key findings

- GUP modifies black hole shadow shapes.
- GUP-rotating black holes do not violate the weak cosmic censorship conjecture.
- Potential for EHT to test GUP effects on black holes.

## Abstract

Based on string theory, loop quantum gravity, black hole physics, and other theories of quantum gravity, physicists have proposed generalized uncertainty principle (GUP) modifications. In this work, within the framework of GUP-gravity theory, we have successfully derived an exact solution to Einstein$'$s field equation, discuss the possibility of using EHT to test GUP and how GUP changes the weak cosmic censorship conjecture for black hole. We analyze two different ways of constructing GUP rotating black holes (Model I and Model II). Model I takes into account the modification of mass by GUP, i.e. the change of mass by quantization of space, and the resulting GUP-rotating black hole metric (18) is similar in form to Kerr black hole. Model II takes into account the modification of the rotating black hole when GUP is an external field, where GUP acts like an electric charge, and the resulting GUP-rotating black hole metric (19) is similar in form to Kerr-Newman black hole. By analyzing the shadow shape of the GUP rotating black hole, we have discovered intriguing characteristics regarding the impact of first-order and second-order momentum correction coefficients on the black hole's shadow shape. These findings will be instrumental in future GUP testing using EHT. Additionally, by incident test particle and scalar field with a rotating GUP-black hole, the weak cosmic censorship conjecture is not violated in either extreme black holes or near-extreme black hole.