Do New Spinfoam Models Have a Good Semiclassical Limit?

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SUMMARY

The discussion focuses on the viability of new spinfoam models in achieving a good semiclassical limit, particularly in the context of loop quantum gravity (LQG). Carlo Rovelli's recent work highlights the connection between spinfoam dynamics and LQG, emphasizing that while the dynamics of LQG are non-transparent, spinfoam dynamics are more transparent. The newer spinfoam models in 4D incorporate an immirizi parameter, aligning their kinematics with LQG. However, the overall effectiveness of these models in a semiclassical low energy large volume limit remains uncertain as research is ongoing.

PREREQUISITES
  • Understanding of loop quantum gravity (LQG)
  • Familiarity with spinfoam models
  • Knowledge of semiclassical limits in quantum gravity
  • Awareness of the immirizi parameter in quantum theories
NEXT STEPS
  • Research the implications of the immirizi parameter in spinfoam models
  • Explore the differences between transparent and non-transparent dynamics in quantum gravity
  • Study the latest developments in loop quantum gravity and its applications
  • Investigate the current state of research on semiclassical limits in quantum gravity theories
USEFUL FOR

The discussion is beneficial for theoretical physicists, researchers in quantum gravity, and students studying advanced concepts in loop quantum gravity and spinfoam models.

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Does the new spinfoam models have a good semiclassical low energy large volume limit?

By new I mean the new connections Rovelli have discussed as spinfoam 4d now talks to LQG.
 
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Not know yet. Work is in progress.
 
f-h said:
Not know yet. Work is in progress.

* Carlo Rovelli - Looppy & Foammy: at long last, falling in love
http://cift.fuw.edu.pl/users/kosteck...08/rovelli.pdf

Rovelli speaks of LQG dynamics as non-transparent, spinfoam dynamics as transparent.

The newer SF models in 4D have an immirizi parameter and the kinematics matches LQG.
 
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