Constraints from CMB on Spacetime Noncommutativity and Causality Violation
arXiv:0806.2458 · doi:10.1103/PhysRevD.79.063004
Abstract
We try to constrain the noncommutativity length scale of the theoretical model given in Ref. [1] using the observational data from ACBAR, CBI and five year WMAP. The noncommutativity parameter is not constrained by WMAP data, however ACBAR and CBI data restrict the lower bound of its energy scale to be around 10 TeV. We also derive an expression for the amount of non-causality coming from spacetime noncommutativity for the fields of primordial scalar perturbations that are space-like separated. The amount of causality violation for these field fluctuations are direction dependent.
15 pages, 6 figures
References in corpus (8)
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Likelihoods and Parameters from the WMAP data
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Angular Power Spectra
- Direction-Dependent CMB Power Spectrum and Statistical Anisotropy from Noncommutative Geometry
- Quantum Fields with Noncommutative Target Spaces
- S-Matrix on the Moyal Plane: Locality versus Lorentz Invariance
- Noncommutative field gas driven inflation
- MHD waves within Noncommutative Maxwell theory
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- Noncommutative Gravity and Quantum Field Theory on Noncommutative Curved Spacetimes
- Noncommutative Double Scalar Fields in FRW Cosmology as Cosmical Oscillators
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- Imprints of a hemispherical power asymmetry in the seven-year WMAP data due to non-commutativity of space-time
- Quantum Theory, Noncommutativity and Heuristics
- Inflation on a Non-Commutative Space-Time