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Unification of type-II strings and T duality
Olaf Hohm1, Seung Ki Kwak, Barton Zwiebach
1Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
We unified type-II string theories using doubled spacetime coordinates and T-duality. This formulation geometrically realizes the O(10,10) T-duality group, describing Ramond-Ramond fields via a generalized metric, unifying all type-II theories.
Area of Science:
- String Theory
- High-Energy Physics
- Theoretical Physics
Background:
- Type-II string theories are fundamental in M-theory and supergravity.
- Understanding their low-energy limits is crucial for theoretical physics.
- Existing descriptions lack a unified framework for T-duality.
Purpose of the Study:
- To present a unified description of the low-energy limits of type-II string theories.
- To geometrically realize the T-duality group O(10,10).
- To provide a framework for unifying different type-II theories.
Main Methods:
- Doubling spacetime coordinates.
- Formulating a theory that geometrically realizes the O(10,10) T-duality group.
- Describing Ramond-Ramond fields using a spinor of O(10,10).
- Coupling gravitational fields via a generalized metric.
Main Results:
- A unified description of type-II string theories is achieved.
- The T-duality group O(10,10) is geometrically realized.
- Ramond-Ramond fields are described within the unified framework.
- Each type-II theory is obtained from a specific subspace of the doubled space.
Conclusions:
- The proposed formulation successfully unifies type-II string theories.
- This unified approach offers new insights into T-duality and string theory.
- The geometric realization of O(10,10) is a key advancement.
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