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http://arxiv.org/abs/1105.6359

Steven B. Giddings

(Submitted on 31 May 2011)

Some problems in finding a complete quantum theory incorporating gravity are discussed. One is that of giving a consistent unitary description of high-energy scattering. Another is that of giving a consistent quantum description of cosmology, with appropriate observables. While string theory addresses some problems of quantum gravity, its ability to resolve these remains unclear. Answers may require new mechanisms and constructs, whether within string theory, or in another framework.

32 pages, 5 figures. Invited contribution for "

===========================

EDIT: some interesting side information is that Foundations of Physics is devoting a special issue to

Sebastian de Haro's PhD advisor was Gerard 't Hooft. He got his PhD in 2001, I think. I'm not familiar with Dennis Dieks. Everybody knows who Erik Verlinde is. I'll put some links to some of these people's research:

de Haro http://arxiv.org/find/hep-th/1/au:+Haro_S/0/1/0/all/0/1

Dieks http://arxiv.org/find/grp_physics/1/au:+Dieks_D/0/1/0/all/0/1

**Is string theory a theory of quantum gravity?**Steven B. Giddings

(Submitted on 31 May 2011)

Some problems in finding a complete quantum theory incorporating gravity are discussed. One is that of giving a consistent unitary description of high-energy scattering. Another is that of giving a consistent quantum description of cosmology, with appropriate observables. While string theory addresses some problems of quantum gravity, its ability to resolve these remains unclear. Answers may require new mechanisms and constructs, whether within string theory, or in another framework.

32 pages, 5 figures. Invited contribution for "

*Forty Years of String Theory: Reflecting on the Foundations*," a special issue of*Found. Phys*., ed. by G 't Hooft, E. Verlinde, D. Dieks, S. de Haro.===========================

EDIT: some interesting side information is that Foundations of Physics is devoting a special issue to

**Forty Years of String Theory**. Gerard 't Hooft is the journal's chief editor. He has three other people help put the special issue on String together as co editors.Sebastian de Haro's PhD advisor was Gerard 't Hooft. He got his PhD in 2001, I think. I'm not familiar with Dennis Dieks. Everybody knows who Erik Verlinde is. I'll put some links to some of these people's research:

de Haro http://arxiv.org/find/hep-th/1/au:+Haro_S/0/1/0/all/0/1

Dieks http://arxiv.org/find/grp_physics/1/au:+Dieks_D/0/1/0/all/0/1

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