%0 Journal Article
%T Towards quantum gravity
%J Journal of Holography Applications in Physics
%I Damghan University Press
%Z 2783-4778
%A Kruglov, Sergey I
%D 2023
%\ 06/01/2023
%V 3
%N 2
%P 53-58
%! Towards quantum gravity
%K quantum gravity
%K nonperturbative methods
%K diffeomorphism-invariant variables
%K Wheeler--DeWitt equation
%K first-order formalism
%R 10.22128/jhap.2023.687.1053
%X We analyze different approaches to quantum gravity. It is stressed that nonperturbative methods to quantise gravity and the usage of diffeomorphism-invariant variables are very important. We pay attention on the Wheeler--DeWitt equation in the framework of canonical quantum gravity. The Wheeler--DeWitt equation is presented in the first order formalism with the hope that this form can solve some problems such as singularities and the ordering. Also, there is a problem of defining the time.
%U https://jhap.du.ac.ir/article_323_369b10408d53c9c9569c60de2c42f16e.pdf