String Theory, Space-Time Non-Commutativity and Structure Formation

Abstract

A natural consequence of string theory is a non-commutative structure of space-time on microscopic scales. The existence of a minimal length, and a modification of the effective field theory are two consequences of this space-time non-commutativity. I will first explore some consequences of the modifications of the effective field theory for structure formation in the context of an inflationary cosmology. Then, I will explore the possibility that the existence of a minimal length will lead to a structure formation scenario different from inflation. Specifically, I will discuss recent work on string gas cosmology.

12 pages, 2 figures, based on an invited talk at the 21st Nishinomiya-Yukawa Memorial Symposium, Nov. 11 - 16, 2006, to be publ. in the proceedings (Prog. Theor. Phys. Suppl.)

References in corpus (21)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• The Trans-Planckian Problem of Inflationary Cosmology
• The Robustness of Inflation to Changes in Super-Planck-Scale Physics
• Inflation as a Probe of Short Distance Physics
• Producing a Scale-Invariant Spectrum of Perturbations in a Hagedorn Phase of String Cosmology
• String Gas Cosmology
• Noncommutative Spacetime, Stringy Spacetime Uncertainty Principle, and Density Fluctuations
• Tensor Modes from a Primordial Hagedorn Phase of String Cosmology
• Remarks on Inflation and Noncommutative Geometry
• String Gas Cosmology and Structure Formation
• Non-commutative inflation and the CMB
• Non-perturbative Gravity, Hagedorn Bounce & CMB
• Moduli Stabilization with the String Higgs Effect
• Stabilization of Extra Dimensions at Tree Level
• Inflationary Theory and Alternative Cosmology
• Radion Stabilization by Stringy Effects in General Relativity
• On T-Duality in Brane Gas Cosmology
• Moduli Stabilization in String Gas Cosmology
• Challenges for String Gas Cosmology
• Inflation Free, Stringy Generation of Scale-Invariant Cosmological Fluctuations in D = 3 + 1 Dimensions
• Conceptual Problems of Inflationary Cosmology and a New Approach to Cosmological Structure Formation

Cited by in corpus (11)

• Evolution of Metric Perturbations in Quintom Bounce model
• On Black Holes and Cosmological Constant in Noncommutative Gauge Theory of Gravity
• Constraint on noncommutative spacetime from PLANCK data
• Is Noncommutative Eternal Inflation Possible?
• A new mechanism for non-locality from string theory: UV-IR quantum entanglement and its imprints on the CMB
• Cosmological implications of a Dark Matter self-interaction energy density
• Cosmology of fermionic dark matter
• Thermodynamical properties of a noncommutative anti-de Sitter-Einstein-Born-Infeld spacetime from gauge theory of gravity
• Feasibility of Primordial Black Hole Remnants as Dark Matter in View of Hawking Radiation Recoil
• Geodesic motion of a test particle around a noncommutative Schwarzchild Anti-de Sitter black hole
• Elastic scattering of electron by a Yukawa potential in non-commutative spacetime