标题： 测试极端磁化Kerr-Newman黑洞的弱宇宙审查猜想 显示英文标题

标题： Testing the weak cosmic censorship conjecture for extremal magnetized Kerr-Newman black holes

摘要： 我们通过注入测试粒子的方法来检验磁化Kerr-Newman时空的弱宇宙审查猜想。因此，我们需要知道当测试粒子进入视界时黑洞的参数如何变化。对于非渐近平坦的时空，这是一个未解决的问题，因为黑洞和粒子的能量存在歧义。我们发现了一种新的方法来解决这个问题。我们从第一定律的“物理过程版本”开始，该定律将粒子的参数与黑洞面积的变化联系起来。通过将这个第一定律与通常的黑洞热力学第一定律进行比较，我们重新定义了粒子的能量，使得能量能够与黑洞的质量参数匹配。然后，我们表明，当带电测试粒子落入极端磁化Kerr-Newman黑洞时，其视界可能会被破坏，这可能导致弱宇宙审查猜想的违反。我们还发现，这一过程允许的参数范围非常小，这表明在考虑自力和辐射效应后，弱宇宙审查猜想可能仍然成立。与没有磁场的情况相比，粒子不能在无限远处释放以破坏视界。而在弱磁场的情况下，随着磁场的增加，释放点会更接近视界。这表明磁场使宇宙审查的破坏更加困难。最后，通过将我们的新方法应用于Kerr-Newman-dS（AdS）黑洞，这些是众所周知的非渐近平坦时空，我们得到了与黑洞质量参数匹配的粒子能量表达式。 显示英文摘要

摘要： We test the weak cosmic censorship conjecture for magnetized Kerr-Newman spacetime via the method of injecting a test particle. Hence, we need to know how the black hole's parameters change when a test particle enters the horizon. This was an unresolved issue for non-asymptotically flat spacetimes since there are ambiguities on the energies of black holes and particles. We find a novel approach to solve the problem. We start with the "physical process version" of the first law, which relates the particle's parameters with the change in the area of the black hole. By comparing this first law with the usual first law of black hole thermodynamics, we redefine the particle's energy such that the energy can match the mass parameter of the black hole. Then, we show that the horizon of the extremal magnetized Kerr-Newman black hole could be destroyed after a charged test particle falls in, which leads to a possible violation of the weak cosmic censorship conjecture. We also find that the allowed parameter range for this process is very small, which indicates that after the self-force and radiation effects are taken into account, the weak cosmic censorship conjecture could still be valid. In contrast to the case where the magnetic field is absent, the particle cannot be released at infinity to destroy the horizon. And in the case of a weak magnetic field, the releasing point becomes closer to the horizon as the magnetic field increases. This indicates that the magnetic field makes the violation of the cosmic censorship more difficult. Finally, by applying our new method to Kerr-Newman-dS (AdS) black holes, which are well-known non-asymptotically flat spacetimes, we obtain the expression of the particle's energy which matches the black hole's mass parameter.