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Three new papers appeared this week which strongly reinforce the Loop program.

1. The Ashtekar Sloan paper shows inflation favors the Loop early universe. Loop cosmology makes an

2. The Barrett Fairbairn Hellmann paper is the third this year from Barrett's group at Nottingham, establishing the classical GR limit for Loop's new covariant version. Page 15:

"...The question of whether the Regge equations of motion appear correctly from the state sum models is an important question...For the Lorentzian theory however, the situation is much simpler and clearer... Thus the Lorentzian gravity conﬁgurations can only be perturbed to other Lorentzian gravity conﬁgurations. This means that the correct Regge-like gluing of 4-simplexes is preserved under perturbations. Thus perturbations can lead only to the Regge equations of motion.

3. In the paper by Bianchi Magliaro Perini, it looks like they have hit on a satisfactory way to define coherent semiclassical Loop states. This has been a focus of considerable effort by several groups. Page 9:

"...A surprising property of the states we have discussed is that they bring together so many (apparently conﬂicting) ideas that have been proposed in the search for semiclassical states in Loop Quantum Gravity. We consider this convergence to be a measure of the robustness of the theory."

1. The Ashtekar Sloan paper shows inflation favors the Loop early universe. Loop cosmology makes an

**adequate (60 e-folds) inflation episode overwhelmingly more likely**, without special tuning, than is classically the case.2. The Barrett Fairbairn Hellmann paper is the third this year from Barrett's group at Nottingham, establishing the classical GR limit for Loop's new covariant version. Page 15:

"...The question of whether the Regge equations of motion appear correctly from the state sum models is an important question...For the Lorentzian theory however, the situation is much simpler and clearer... Thus the Lorentzian gravity conﬁgurations can only be perturbed to other Lorentzian gravity conﬁgurations. This means that the correct Regge-like gluing of 4-simplexes is preserved under perturbations. Thus perturbations can lead only to the Regge equations of motion.

**Thus the state sum model does indeed contain asymptotic terms which approximate general relativity**."3. In the paper by Bianchi Magliaro Perini, it looks like they have hit on a satisfactory way to define coherent semiclassical Loop states. This has been a focus of considerable effort by several groups. Page 9:

"...A surprising property of the states we have discussed is that they bring together so many (apparently conﬂicting) ideas that have been proposed in the search for semiclassical states in Loop Quantum Gravity. We consider this convergence to be a measure of the robustness of the theory."

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