Quantum gravity from noncommutative spacetime
Quantum gravity from noncommutative spacetime
复制标题
来自非交换时空的量子引力
DOI:
10.3938/jkps.65.1754
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发表时间:
2010
影响因子:
0.6
通讯作者:
Hyun Seok Yang
中科院分区:
文献类型:
--
作者:
Jungjai Lee;Hyun Seok Yang
We review a novel and authentic way to quantize gravity. This novel approach is based on the fact that Einstein gravity can be formulated in terms of a symplectic geometry rather than a Riemannian geometry in the context of emergent gravity. An essential step for emergent gravity is to realize the equivalence principle, the most important property in the theory of gravity (general relativity), from U(1) gauge theory on a symplectic or Poisson manifold. Through the realization of the equivalence principle, which is an intrinsic property in symplectic geometry known as the Darboux theorem or the Moser lemma, one can understand how diffeomorphism symmetry arises from noncommutative U(1) gauge theory; thus, gravity can emerge from the noncommutative electromagnetism, which is also an interacting theory. As a consequence, a background-independent quantum gravity in which the prior existence of any spacetime structure is not a priori assumed but is defined by using the fundamental ingredients in quantum gravity theory can be formulated. This scheme for quantum gravity can be used to resolve many notorious problems in theoretical physics, such as the cosmological constant problem, to understand the nature of dark energy, and to explain why gravity is so weak compared to other forces. In particular, it leads to a remarkable picture of what matter is. A matter field, such as leptons and quarks, simply arises as a stable localized geometry, which is a topological object in the defining algebra (noncommutative ★-algebra) of quantum gravity.
DOI:
10.1017/9781009253161
发表时间:
2023-02
期刊:
--
影响因子:
--
作者:
S. Hawking;G. Ellis
通讯作者:
S. Hawking;G. Ellis
DOI:
--
发表时间:
2009
期刊:
JHEP
影响因子:
--
作者:
Hajime Aoki;Jun Nishimura;Yoshiaki Susaki
通讯作者:
Yoshiaki Susaki
DOI:
--
发表时间:
2009
期刊:
JHEP
影响因子:
--
作者:
Hajime Aoki;Jun Nishimura;Yoshiaki Susaki
通讯作者:
Yoshiaki Susaki