1. Recent developments in 3D gravity Niklas Johansson Vienna lunch club, Oct 14 based on work w/ Daniel Grumiller and Roman Jackiw

2. Outline 1.3D gravity – hot or not? 2.Topologically massive gravity 3.Chiral gravity of Li, Song and Strominger – gravitons? 4.Logarithmic modes 5.Non-perturbatively 6.Summary and outlook

3. Outline 1.3D gravity – hot or not? 2.Topologically massive gravity 3.Chiral gravity of Li, Song and Strominger – gravitons? 4.Logarithmic modes 5.Non-perturbatively 6.Summary and outlook Hot but problematic! New proposal! Is it stable? No.

4. 3D gravity – why?

5. Quantizing gravity – why?

6. 3D gravity Deser and Jackiw

7. AdS

8. 3D gravity Achucarra and Townsend Witten Bañados, Teitelboim and Zanelli Brown and Henneaux

9. 3D gravity Achucarra and Townsend Witten Bañados, Teitelboim and Zanelli Brown and Henneaux

10. AdS-CFT

12. CFT

14. 3D gravity Achucarra and Townsend Witten Bañados, Teitelboim and Zanelli Brown and Henneaux

15. Witten reconsidered... Maloney and Witten,...

16. Topologically massive gravity Deser, Jackiw and Templeton

17. Topologically massive gravity

18. Summary of CTMG Unstable!?

19. 3D chiral gravity Li, Song and Strominger

20. 3D chiral gravity

21. Gravitons at.

24. 3D chiral gravity

25. Logarithmic modes Daniel and I Carlip, Deser, Waldron and Wise

26. Logarithmic modes

28. Harvard strikes back Li, Song and Strominger

29. MIT/UU answers Daniel and I

30. Argentina & NYC enters Giribet, Kleban and Porrati

31. Non-perturbatively Daniel, Roman and I Carlip

32. Summary

33. Open questions

34. Thank you!