# String Theory: Progress and Problems

@article{Schwarz2007StringTP, title={String Theory: Progress and Problems}, author={John H. Schwarz}, journal={Progress of Theoretical Physics Supplement}, year={2007}, volume={170}, pages={214-226} }

String theory builds on the great legacy of Yukawa and Tomonaga: New degrees of freedom and control of the UV are two important themes. This talk will give an overview of some of the progress and some of the unsolved problems that characterize string theory today. It is divided into two parts: Connecting String Theory to the Real World; Gauge Theory/String Theory Duality.
Two other major subjects, which I will omit, are Black Holes in String Theory and The Impact of String Theory on…

## 11 Citations

### Foundations of E-Theory

- Mathematics
- 2016

Differential geometry is a powerful tool in various branches of science, especially in theoretical physics. Ordinary differential geometry requires differentiable manifolds. This research paper shows…

### Quantum mechanical observer and superstring/M theory

- Physics
- 2008

Terms are suggested for inclusion in a Lagrangian density as seen by an observer O2, to represent the dynamics of a quantum mechanical observer O1 that is an initial stage in an observation process.…

### The General Theory of Space Time, Mass, Energy, Quantum Gravity, Perception, Four Fundamental Forces, Vacuum Energy, Quantum Field

- Physics
- 2012

Essentially GUT and Vacuum Field are related to Quantum field where Quantum entanglement takes place. Mass energy equivalence and its relationship with Quantum Computing are discussed in various…

### “Time”-covariant Schrödinger equation and invariant Decay probability: The Λ-Kantowski-Sachs universe

- Physics
- 2021

The system under study is the Λ-Kantowski-Sachs universe. Its canonical quantization is provided based on a recently developed method: the singular minusuperspace Lagrangians describing the system,…

### CMBR Isotropy and Anisotropy in Stoney Scale Black Hole Cosmology

- Physics
- 2014

If one is willing to consider the current cosmic microwave back ground temperature as a quantum gravitational effect of the evolving primordial cosmic black hole general theory of relativity and…

### Time-covariant Schrödinger equation and invariant decay probability: the $$\Lambda $$-Kantowski–Sachs universe

- PhysicsThe European Physical Journal C
- 2021

The system under study is the $$\Lambda $$
Λ
-Kantowski–Sachs universe. Its canonical quantization is provided based on a recently developed method: the singular minisuperspace Lagrangian…

### On the Evolving Black Holes and Black Hole Cosmology- Scale Independent Quantum Gravity Approach

- Physics
- 2015

So far many models have been proposed for understanding the real picture of ‘quantum gravity’. But none is successful in interpreting the observed cosmological phenomena. By going through this…

### Spherical black holes with regular center: a review of existing models including a recent realization with Gaussian sources

- Physics
- 2008

We review, in a historical perspective, some results about black hole spacetimes with a regular center. We then see how their properties are realized in a specific solution that recently appeared; in…

### The Strong Force: From Quarks to Hadrons and Nuclei

- Physics
- 2012

The strong force, which binds quarks and gluons together in hadrons, is commonly attributed to the color charge, a property of quarks and gluons only, which is analogous to the electric charge…

## References

SHOWING 1-10 OF 30 REFERENCES

### The statistics of string/M theory vacua

- Physics
- 2003

We discuss systematic approaches to the classification of string/M theory vacua, and physical questions this might help us resolve. To this end, we initiate the study of ensembles of effective…

### String theory and M-theory: A modern introduction

- Physics
- 2006

This book guides the reader from the basics of string theory to recent developments, before describing modern developments, including D-branes, string dualities and M-theory, and concludes with Matrix theory, the AdS/CFT duality and its generalizations.

### The Large-N Limit of Superconformal Field Theories and Supergravity

- Physics, Mathematics
- 1997

We show that the large-N limits of certainconformal field theories in various dimensions includein their Hilbert space a sector describing supergravityon the product of anti-de Sitter spacetimes,…

### ANTI-DE SITTER SPACE, THERMAL PHASE TRANSITION AND CONFINEMENT IN GAUGE THEORIES

- Physics
- 1998

The correspondence between supergravity (and string theory) on AdS space and boundary conformal field theory relates the thermodynamics of super-Yang–Mills theory in four dimensions to the…

### A toy model for the AdS/CFT correspondence

- Physics
- 2004

We study the large-N gauged quantum mecchanics for a single hermitean matrix in the Harmonic oscillator potential well as a toy model for the AdS/CFT correspondence. We argue that the dual geometry…

### Bubbling AdS space and 1/2 BPS geometries

- Mathematics, Physics
- 2004

We consider all 1/2 BPS excitations of AdS × S configurations in both type-IIB string theory and M-theory. In the dual field theories these excitations are described by free fermions. Configurations…

### Dirichlet Branes and Ramond-Ramond charges.

- PhysicsPhysical review letters
- 1995

We show that D-branes, extended objects defined by mixed Dirichlet-Neumann boundary conditions, break half the supersymmetries of the type II superstring and carry a complete set of electric and…

### A Large mass hierarchy from a small extra dimension

- Physics
- 1999

We propose a new higher-dimensional mechanism for solving the hierarchy problem. The weak scale is generated from the Planck scale through an exponential hierarchy. However, this exponential arises…

### Low energy hadron physics in holographic QCD

- Physics
- 2005

We present a holographic dual of four-dimensional, large N_c QCD with massless flavors. This model is constructed by placing N_f probe D8-branes into a D4 background, where supersymmetry is…