#### marcus

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Here are the talks planned for this month's BH-LQG workshop.

I think one thing that motivated the organizers is the recent appearance of results showing a step-wise increase in BH entropy.

That is the increase is only approximately linear with horizon area---detailed analysis shows more complicated behavior.

This suggests a

There may be other foci of attention. One way to stay informed about what's happening in a field is to keep an eye on current conference and workshop programs, since they reflect the researchers' interests. The BH quantum geometry workshop starts 26 March--in less than 2 weeks. Here's the list of talks.

THURSDAY MORNING: Quantum horizons

09:00-09:30 A.Ashtekar: Overview.

09:30-10:30 A.Corichi: General summary of BH and quantum horizon geometry.

11:00-11:30 A.Perez: Extensions to include topological terms in the action.

11:30-12:00 J.Diaz-Polo: SU(2) treatment and CFTs.

THURSDAY AFTERNOON: Entropy

14:30-15:00 J.Lewandowski: Black hole state counting.

15:00-15:30 A.Ghosh: Alternative black hole state counting.

15:30-16:00 H.Sahlmann: The phenomena of steps and generating functions.

16:30-17:30 F.Barbero: Counting and number theory.

FRIDAY MORNING: Hawking Effect and Information Loss

09:00- 9:30 J.Engle: Quantum geometry of Type II horizons.

09:30-10:30 V.Husain: Quantum gravitational collapse.

11:00-12:00 M.Varadarajan: Information Loss.

FRIDAY AFTERNOON: Perspectives on Quantum BHs I

14:30-15:30 M.Bojowald: Spherical Symmetric Reduction of LQG.

15:30-16:30 J.Pullin: Spherically symmetric quantum gravity coupled to a scalar field.

SATURDAY MORNING: Perspective on Quantum BHs II

09:00-10:00 R.Schuetzhold: Analog systems.

10:00-11:00 B.Dittrich: Path integral approach to quantum BHs.

*See Figs 4 and 5, on pages 10 and 11 of Corichi's review:

http://arxiv.org/abs/0901.1302

Alejandro Corichi

17 pages, 5 figures. Extended version of the contribution for the proceedings of the 6th IGCG Conference and a contribution for Advanced Science Letters

(Submitted on 9 Jan 2009)

"Black holes in equilibrium and the counting of their entropy within Loop Quantum Gravity are reviewed. In particular, we focus on the conceptual setting of the formalism, briefly summarizing the main results of the classical formalism and its quantization. We then focus on recent results for small, Planck scale, black holes, where new structures have been shown to arise, in particular

The workshop website:

http://www.uv.es/bhlqg/schedule.htm

I think one thing that motivated the organizers is the recent appearance of results showing a step-wise increase in BH entropy.

That is the increase is only approximately linear with horizon area---detailed analysis shows more complicated behavior.

This suggests a

**quantization of BH entropy**.*There may be other foci of attention. One way to stay informed about what's happening in a field is to keep an eye on current conference and workshop programs, since they reflect the researchers' interests. The BH quantum geometry workshop starts 26 March--in less than 2 weeks. Here's the list of talks.

THURSDAY MORNING: Quantum horizons

09:00-09:30 A.Ashtekar: Overview.

09:30-10:30 A.Corichi: General summary of BH and quantum horizon geometry.

11:00-11:30 A.Perez: Extensions to include topological terms in the action.

11:30-12:00 J.Diaz-Polo: SU(2) treatment and CFTs.

THURSDAY AFTERNOON: Entropy

14:30-15:00 J.Lewandowski: Black hole state counting.

15:00-15:30 A.Ghosh: Alternative black hole state counting.

15:30-16:00 H.Sahlmann: The phenomena of steps and generating functions.

16:30-17:30 F.Barbero: Counting and number theory.

FRIDAY MORNING: Hawking Effect and Information Loss

09:00- 9:30 J.Engle: Quantum geometry of Type II horizons.

09:30-10:30 V.Husain: Quantum gravitational collapse.

11:00-12:00 M.Varadarajan: Information Loss.

FRIDAY AFTERNOON: Perspectives on Quantum BHs I

14:30-15:30 M.Bojowald: Spherical Symmetric Reduction of LQG.

15:30-16:30 J.Pullin: Spherically symmetric quantum gravity coupled to a scalar field.

SATURDAY MORNING: Perspective on Quantum BHs II

09:00-10:00 R.Schuetzhold: Analog systems.

10:00-11:00 B.Dittrich: Path integral approach to quantum BHs.

*See Figs 4 and 5, on pages 10 and 11 of Corichi's review:

http://arxiv.org/abs/0901.1302

**Black holes and entropy in loop quantum gravity: An overview**Alejandro Corichi

17 pages, 5 figures. Extended version of the contribution for the proceedings of the 6th IGCG Conference and a contribution for Advanced Science Letters

(Submitted on 9 Jan 2009)

"Black holes in equilibrium and the counting of their entropy within Loop Quantum Gravity are reviewed. In particular, we focus on the conceptual setting of the formalism, briefly summarizing the main results of the classical formalism and its quantization. We then focus on recent results for small, Planck scale, black holes, where new structures have been shown to arise, in particular

**an effective quantization of the entropy**. We discuss recent results that employ in a very effective manner results from number theory, providing a complete solution to the counting of black hole entropy. We end with some comments on other approaches that are motivated by loop quantum gravity."The workshop website:

http://www.uv.es/bhlqg/schedule.htm

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