Recent developments in 3D gravity

Niklas Johansson

Vienna lunch club, Oct 14

based on work w/ Daniel Grumiller and Roman Jackiw

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

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.

3D gravity – why?

Quantizing gravity – why?

3D gravity

Deser and Jackiw

AdS

3D gravity

Achucarra and Townsend

Witten

Bañados, Teitelboimand Zanelli

Brown and Henneaux

3D gravity

Achucarra and Townsend

Witten

Bañados, Teitelboimand Zanelli

Brown and Henneaux

AdS-CFT

AdS-CFT

CFT

CFT

3D gravity

Achucarra and Townsend

Witten

Bañados, Teitelboimand Zanelli

Brown and Henneaux

Witten reconsidered...

Maloney and Witten, ...

Topologically massive gravity

Deser, Jackiwand Templeton

Topologically massive gravity

Summary of CTMG

Unstable!?

3D chiral gravity

Li, Song and Strominger

3D chiral gravity

Gravitons at .

Gravitons at .

Gravitons at .

3D chiral gravity

Logarithmic modes

Daniel and I

Carlip, Deser, Waldron and Wise

Logarithmic modes

Logarithmic modes

Harvard strikes back

Li, Song and Strominger

MIT/UU answers

Daniel and I

Argentina & NYC enters

Giribet, Kleban and Porrati

Non-perturbatively

Daniel, Roman and I

Carlip

Summary

Open questions

Thank you!