Fri - 10/18/24

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Thu - 10/17/24

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Wed - 10/16/24

**Title:

      The semiclassical propagator for coherent state on twisted geometry**  - **Authors:** Gaoping Long, Hongguang Liu, Cong Zhang  - **Subjects:** Subjects: General Relativity and Quantum Cosmology (gr-qc)  - **Arxiv link:** [https://arxiv.org/abs/](https://arxiv.org/abs/)  - **Abstract**  A new set of twisted geometric variables is introduced to parametrize the holonomy-flux phase space in loop quantum gravity. It is verified that these new geometric variables, after symplectic reduction with respect to the Gauss constraint, form a Poisson algebra which is analogue to that in quantum mechanics. This property ensures that these new geometric variables provide a simple path measure, upon which a new formulation of coherent state path integral based on twisted geometry coherent state is established in loop quantum gravity. Especially, this path integral is analytically computable by expanding the corresponding effective action around the complex evolution trajectories at second order, and the result gives the semi-classical approximation of the quantum propagator between twisted geometry coherent state in LQG.

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  1. [] - Title: Shadows and parameter estimation of rotating quantum corrected black holes and constraints from EHT observation of M87 and Sgr A** - Heena Ali, Shafqat Ul Islam, Sushant G. Ghosh

Tue - 10/15/24

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  1. [] - Title: Absorption, Scattering, Geodesics, Shadows and Lensing Phenomena of Black Holes in Effective Quantum Gravity - N. Heidari, A. A. Araújo Filho, R. C. Pantig, A. Övgün

Mon - 10/14/24

There is no new related paper today

There is no new related paper today

  1. [] - Title: Absorption, Scattering, Geodesics, Shadows and Lensing Phenomena of Black Holes in Effective Quantum Gravity - N. Heidari, A. A. Araújo Filho, R. C. Pantig, A. Övgün

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