If magnetic monopoles exists, and what will happen......?

I have finished some readings in any Quantum Field Theory Courses, i remmenber dirac had made any calculates on it, it shows that if magnetic monopoles exsit and
even there is only one magnetic monopole exists, the cosmologic constant is avvariable, is it?

Another question: Is there any other relationship between cosmologic constant and cosmos itself，I mean the inflation of the Universe......?

如果磁单存在，对于4D QED来说都有CFT。也就是说理论可以有nontrivial UV fixed point。


我只知道宇宙学中有磁单极子疑难。不清楚你指的dirac算的东西。

I have finished some readings in any Quantum Field Theory Courses, i remmenber dirac had made any calculates on it, it shows that if magnetic monopoles exsit and
even there is only one magnetic monopole exists, the cosmologic constant is avvariable, is it?
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I don't think there is any known link between cosmological constant and monopole. In the days of Dirac, we don't know whether there is a cosmological constant yet.


Another question: Is there any other relationship between cosmologic constant and cosmos itself，I mean the inflation of the Universe......
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cosmological constant is very important in cosmology, especially in the late time. Inflation usually refers to a very early era. It is dominated by something close to a cosmological constant, but not the cosmological constant of today.