2013 Zakopane slides (Bianchi, Ashtekar)

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In summary, a series of QG-related one-or-two-week schools have been held over the years, with the most recent one being the Zakopane school held from 28 June to 7 July in preparation for the Warsaw GR20 conference. Lectures were given by Abhay Ashtekar and Eugenio Bianchi, with slides available online. Ashtekar's lectures focused on quantum gravity and the early universe, while Bianchi's lectures discussed spinfoam gravity. Unfortunately, Ashtekar was unable to attend due to a storm in the US, but did make it to the GR20 conference.
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http://th-www.if.uj.edu.pl/school/2013/speakers.html

We've seen a series of QG-related one-or-two-week schools, over the years. This year a Zakopane school was held 28 June thru 7 July in the lead-up to the Warsaw GR20 conference.
Abhay Ashtekar and Eugenio Bianchi each gave a series of lectures. Zakopane lectures are primarily aimed at graduate students interested in starting research in any of the areas covered by that year's school.

The slides PDF for several of the talks are available online.

Lectures by Ashtekar:
A mini-course on: Quantum Gravity & the Very Early Universe
(Understanding emerged from the work of many researchers, especially:
Agullo, Barrau, Bojowald, Campiglia, Cailleatau, Corichi, Grain, Kaminski, Lewandowski, Mielczarek, Mena, Nelson, Olmedo, Pawlowski, Singh, Sloan, Thiemann, Velhinho, Wilson-Ewing ...)
Lecture 1
The Big Bang Singularity & Loop Quantum Cosmology
1. Introduction: Singularity Resolution?
2. Loop Quantum Cosmology: Basic Results 3. Novel features at the Foundation
Lecture 2
Cosmological Perturbations
1. Classical Perturbation Theory
2. Quantum Fields on classical FLRW Space-times
3. Quantum fields on Quantum FLRW geometries
Lecture 3
An Extension of the Inflationary Scenario to the Planck Regime
1. Success and Limitations of Inflation
2. The LQC Strategy
3. Results: Pre-inflationary dynamics and its implications.
http://th-www.if.uj.edu.pl/school/2013/talks/ashtekar1.pdf
http://th-www.if.uj.edu.pl/school/2013/talks/ashtekar2.pdf

Lectures by Bianchi:
http://th-www.if.uj.edu.pl/school/2013/talks/Bianchi1.pdf
http://th-www.if.uj.edu.pl/school/2013/talks/Bianchi2.pdf
http://th-www.if.uj.edu.pl/school/2013/talks/Bianchi3.pdf
Spinfoam gravity: progress and perspectives
Lecture 1:
Path integral and the Spinfoam amplitude
Lecture 2:
Quantum geometry in Spinfoams
Lecture 3:
- gravitons
- quantum cosmology
- black hole entropy
 
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I was there :-) Ashtekar actually didn't manage to come due to storm in the US and cancellation of flight :-( he did make it to GR20 though.
 

1. What is the significance of the 2013 Zakopane slides?

The 2013 Zakopane slides refer to a presentation given by theoretical physicist Abhay Ashtekar and mathematician Carlo Rovelli at the 2013 Zakopane Conference in Poland. The slides discussed the application of loop quantum gravity to cosmology, specifically the Bianchi IX model, and proposed a new approach to the problem of time in quantum gravity.

2. What is the Bianchi IX model and why is it important in cosmology?

The Bianchi IX model is a mathematical model used to describe the evolution of the universe in loop quantum gravity. It is important because it allows for the study of the behavior of the universe at the Planck scale, where quantum effects are significant. This model also helps to provide insights into the early universe and the potential effects of quantum gravity on the large-scale structure of the universe.

3. How does loop quantum gravity differ from other theories of quantum gravity?

Loop quantum gravity is a theory that seeks to reconcile the principles of general relativity with the principles of quantum mechanics. It differs from other theories of quantum gravity, such as string theory, in that it does not require the existence of extra dimensions or other exotic concepts. Instead, it describes the fabric of space-time as a network of interconnected loops, which interact with one another to create the observable universe.

4. What is the proposed new approach to the problem of time in quantum gravity?

The proposed new approach to the problem of time in quantum gravity, as presented in the 2013 Zakopane slides, is called the "evolving constants of motion" approach. This approach suggests that instead of treating time as a fundamental concept, it can be derived from the dynamics of the universe. In this view, time is not an external parameter, but rather an emergent property of the universe itself.

5. What are the implications of the 2013 Zakopane slides for our understanding of the universe?

The 2013 Zakopane slides present a new perspective on the behavior of the universe at the smallest scales, where the effects of quantum gravity are significant. This could potentially lead to new insights into the early universe and the nature of space and time. However, further research and experimentation will be needed to fully understand the implications of this approach and its potential impact on our understanding of the universe.

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