The Cosmological Constant Problem, an Inspiration for New Physics
arXiv:gr-qc/0609011
Abstract
We have critically compared different approaches to the cosmological constant problem, which is at the edge of elementary particle physics and cosmology. This problem is deeply connected with the difficulties formulating a theory of quantum gravity. After the 1998 discovery that our universe's expansion is accelerating, the cosmological constant problem has obtained a new dimension. We are mainly interested in the question why the cosmological constant is so small. We have identified four different classes of solutions: a symmetry, a back-reaction mechanism, a violation of (some of) the building blocks of general relativity, and statistical approaches. In this thesis we carefully study all known potential candidates for a solution, but conclude that so far none of the approaches gives a satisfactory solution. A symmetry would be the most elegant solution and we study a new symmetry under transformation to imaginary spacetime.
Ph.D. Thesis
References in corpus (230)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- Measurements of Omega and Lambda from 42 High-Redshift Supernovae
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
- Real Spectra in Non-Hermitian Hamiltonians Having PT Symmetry
- The Cosmological Constant and Dark Energy
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
- Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
- The World as a Hologram
- The Confrontation between General Relativity and Experiment
- de Sitter Vacua in String Theory
- The Case for a Positive Cosmological Lambda-term
- Cosmology and the Fate of Dilatation Symmetry
- The Cosmological Constant
- A Model of Holographic Dark Energy
- The 3D power spectrum of galaxies from the SDSS
- Cosmological Results from High-z Supernovae
- Relativistic gravitation theory for the MOND paradigm
- Effective Field Theory, Black Holes, and the Cosmological Constant
- Quantization of Four-form Fluxes and Dynamical Neutralization of the Cosmological Constant
- MAXIMA-1: A Measurement of the Cosmic Microwave Background Anisotropy on angular scales of 10 arcminutes to 5 degrees
- The dS/CFT Correspondence
- High-Energy Tests of Lorentz Invariance
- Modern tests of Lorentz invariance
- Non-conventional cosmology from a brane-universe
- Quantum deSitter cosmology and phantom matter
- Gravity with a dynamical preferred frame
- Power Spectra for Cold Dark Matter and its Variants
- Cosmology on a Brane in Minkowski Bulk
- Entropy Bounds and Dark Energy
- Equilibrium State of a Massless Self-Interacting Scalar Field in the De Sitter Background
- Supernova Limits on the Cosmic Equation of State
- Reconstructing the linear power spectrum of cosmological mass fluctuations
- Braneworld models of dark energy
- 4d Conformal Field Theories and Strings on Orbifolds
- The phantom menaced: constraints on low-energy effective ghosts
- Strong Interactions and Stability in the DGP Model
- The statistics of string/M theory vacua
- The Anthropic Landscape of String Theory
- Properties of the Intracluster Medium in an Ensemble of Nearby Galaxy Clusters
- Distributions of flux vacua
- Ghost Inflation
- From the Big Bang Theory to the Theory of a Stationary Universe
- Dark Matter and Dark Energy
- Cosmological Dynamics of Phantom Field
- Nonperturbative Continuity in Graviton Mass versus Perturbative Discontinuity
- Gravity on a Brane in Infinite-Volume Extra Space
- Quantum Gravity In De Sitter Space
- 23 High Redshift Supernovae from the IfA Deep Survey: Doubling the SN Sample at z>0.7
- The cosmon model for an asymptotically vanishing time-dependent cosmological ``constant''
- Metastable Gravitons and Infinite Volume Extra Dimensions
- Supersymmetric Dark Matter in Light of WMAP
- The Casimir Effect and the Quantum Vacuum
- The Most Massive Distant Clusters: Determining Omega and sigma_8
- Predictions from Quantum Cosmology
- Opening up extra dimensions at ultra-large scales
- Self-tuning flat domain walls in 5d gravity and string theory
- Loop quantum gravity and light propagation
- Superfluid analogies of cosmological phenomena
- Towards a Naturally Small Cosmological Constant from Branes in 6D Supergravity
- The Quantum Gravitational Back-Reaction On Inflation
- The Trouble with de Sitter Space
- The anthropic principle and the mass scale of the Standard Model
- On cosmic acceleration without dark energy
- Forks in the Road, on the Way to Quantum Gravity
- Weyl Cohomology and the Effective Action for Conformal Anomalies
- Cross-Correlation of the Cosmic Microwave Background with the 2MASS Galaxy Survey: Signatures of Dark Energy, Hot Gas, and Point Sources
- Acoustic Signatures in the Cosmic Microwave Background
- More on ghosts in DGP model
- Determining the Cosmic Distance Scale from Interferometric Measurements of the Sunyaev-Zel'dovich Effect
- Nonsingular global string compactifications
- The Accelerated Universe and the Moon
- Les Houches Lectures on De Sitter Space
- Diluting Cosmological Constant In Infinite Volume Extra Dimensions
- RG-Flow, Gravity and the Cosmological Constant
- Variable Cosmological Constant as a Planck Scale Effect
- Tests of the Accelerating Universe with Near-Infrared Observations of a High-Redshift Type Ia Supernova
- Probabilities in the inflationary multiverse
- Renormalization group improved gravitational actions: a Brans-Dicke approach
- Cosmological parameters from CMB measurements and the final 2dFGRS power spectrum
- Running G and Λat low energies from physics at M_X: possible cosmological and astrophysical implications
- Effective equation of state for dark energy: mimicking quintessence and phantom energy through a variable Lambda
- Back Reaction And Local Cosmological Expansion Rate
- Non-Local Modification of Gravity and the Cosmological Constant Problem
- Limit on Lorentz and CPT Violation of the Proton Using a Hydrogen Maser
- The m->0 limit for massive graviton in dS_4 and AdS_4. How to circumvent the van Dam-Veltman-Zakharov discontinuity
- MOND--theoretical aspects
- A Comment on Self-Tuning and Vanishing Cosmological Constant in the Brane World
- Improved Estimates of Cosmological Perturbations
- Photon mass from inflation
- The influence of cosmological transitions on the evolution of density perturbations
- Bound on Lorentz- and CPT-Violating Boost Effects for the Neutron
- On the Graviton Mass
- The Cosmological Constant Problem from a Brane-World Perspective
- Dark Energy: the Cosmological Challenge of the Millennium
- Dual PT-Symmetric Quantum Field Theories
- On likely values of the cosmological constant
- Quasi-Localization of Gravity by Resonant Modes
- Compactification for a Three-Brane Universe
- Ghosts, Strong Coupling and Accidental Symmetries in Massive Gravity
- Solutions to the cosmological constant problems
- Testing the running of the cosmological constant with Type Ia Supernovae at high z
- Vacuum Energy Cancellation in a Non-supersymmetric String
- Selftuning and its footprints
- The flight of the bumblebee: vacuum solutions of a gravity model with vector-induced spontaneous Lorentz symmetry breaking
- Observational Constraints on General Relativistic Energy Conditions, Cosmic Matter Density and Dark Energy from X-Ray Clusters of Galaxies and Type-Ia Supernovae
- Stationarity of Inflation and Predictions of Quantum Cosmology
- Results from the High-Z Supernova Search Team
- New constraints on MOND from galaxy clusters
- Sidestepping the Cosmological Constant with Football-Shaped Extra Dimensions
- Can superhorizon cosmological perturbations explain the acceleration of the universe?
- Constraining the quintessence equation of state with SnIa data and CMB peaks
- Renormalization-group running cosmologies - a scale-setting procedure
- Supersymmetry Breaking in the Anthropic Landscape
- The Cosmological Constant From The Viewpoint Of String Theory
- Supergravity, Dark Energy and the Fate of the Universe
- Supersymmetric Large Extra Dimensions and the Cosmological Constant: An Update
- A Conical Tear Drop as a Vacuum-Energy Drain for the Solution of the Cosmological Constant Problem
- Density Perturbations of Quantum Mechanical Origin and Anisotropy of the Microwave Background
- The mathematical basis for deterministic quantum mechanics
- A Dynamical Approach to the Cosmological Constant
- A Framework for the Landscape
- Photons and Gravitons as Goldstone Bosons, and the Cosmological Constant
- Football Shaped Extra Dimensions and the Absence of Self-Tuning
- Fat Gravitons, the Cosmological Constant and Sub-millimeter Tests
- Conformal Invariance and Cosmic Background Radiation
- String Duality and Non-supersymmetric Strings
- Brane-induced gravity in more than one extra dimensions: violation of equivalence principle and ghost
- Orientifolds of Non-Supersymmetric Asymmetric Orbifolds
- Anthropic prediction for Lambda and the Q catastrophe
- Non-Supersymmetric Type I Strings with Zero Vacuum Energy
- M-theory, Cosmological Constant and Anthropic Principle
- A Symmetry for the Cosmological Constant
- Can superhorizon perturbations drive the acceleration of the Universe?
- Classification of Supernovae
- Bulk Singularities and the Effective Cosmological Constant for Higher Co-dimension Branes
- Future Evolution of Nearby Large-Scale Structure in a Universe Dominated by a Cosmological Constant
- Reflectionless Potentials and PT Symmetry
- Density Perturbations and the Cosmological Constant from Inflationary Landscapes
- Attractive and Repulsive Gravity
- Experimental implications of mirror matter-type dark matter
- Vacuum energy and relativistic invariance
- Graviton Mass or Cosmological Constant?
- Three-Dimensional Supergravity and the Cosmological Constant
- Unbounded entropy in spacetimes with positive cosmological constant
- Cosmological long wavelength perturbations
- Phantom Matter and the Cosmological Constant
- Strong coupling in brane-induced gravity in five dimensions
- The Cold Big-Bang Cosmology as a Counter-example to Several Anthropic Arguments
- Spontaneous Lorentz Violation and the Long-Range Gravitational Preferred-Frame Effect
- Quintessential Adjustment of the Cosmological Constant
- Physical States of the Quantum Conformal Factor
- Dark energy equation of state and anthropic selection
- Spontaneous Breaking of Lorentz Invariance
- Gravity as elasticity of spacetime: a paradigm to understand horizon thermodynamics and cosmological constant
- On Regularization Scheme Dependence of Predictions in Inflationary Cosmology
- Dark Energy as a Modification of the Friedmann Equation
- Using Early Data to Illuminate the Pioneer Anomaly
- Gravity tests in the solar system and the Pioneer anomaly
- Quantum discontinuity between zero and infinitesimal graviton mass with a Lambda term
- World Nematic Crystal Model of Gravity Explaining the Absence of Torsion
- Relaxation of the cosmological constant at inflation?
- The history of the cosmological constant problem
- Back Reaction of Cosmological Perturbations and the Cosmological Constant Problem
- Strong Coupling vs. 4-D Locality in Induced Gravity
- Thermal Decay of the Cosmological Constant into Black Holes
- Holes in the ghost condensate
- Back-Reaction Is For Real
- Type Ia Supernovae and Cosmology
- Fractal Geometry of Quantum Spacetime at Large Scales
- Anthropic Distribution for Cosmological Constant and Primordial Density Perturbations
- Conformal fixed point, Cosmological Constant and Quintessence
- Evolution of Cosmological Perturbations in the Long Wavelength Limit
- A Mission to Test the Pioneer Anomaly
- Quantum Field Theory in Curved Spacetime
- Quantum Relaxation of the Cosmological Constant
- String theory as a universal language
- Local and global gravity
- Primordial inflation explains why the universe is accelerating today
- AdS_5 and the 4D Cosmological Constant
- A symmetry for vanishing cosmological constant in an extra dimensional toy model
- Theories of the Cosmological Constant
- Short distance non-perturbative effects of large distance modified gravity
- New Astrophysical Constraints on the Mass of the Superlight Gravitino
- Quantum M^2 -> 2Lambda/3 discontinuity for massive gravity with a Lambda term
- ICTP Lectures on Large Extra Dimensions
- Cosmological influence of super-Hubble perturbations
- Lorentz and CPT Tests in Matter and Antimatter
- Vacuum energy: quantum hydrodynamics vs quantum gravity
- Is our Universe brany ?
- Asymptotically finite models and the screening of the cosmological constant by quantum effects
- Hodge Duality and Cosmological Constant
- An upper bound on the number of e-foldings
- Blown-up p-Branes and the Cosmological Constant
- Nonsingular deformations of singular compactifications, the cosmological constant, and the hierarchy problem
- Supernova Constraints on Braneworld Dark Energy
- Looking At The Cosmological Constant From Infinite--Volume Bulk
- Testing braneworlds with the binary pulsar
- Cosmological Structure Evolution and CMB Anisotropies in DGP Braneworlds
- Inhomogeneous dusty Universes and their deceleration
- Testing General Relativity on the Scales of Cosmology
- Inflation and Nonsingular Spacetimes of Cosmic Strings
- Back-Reaction: A Cosmological Panacea
- Vacuum in quantum liquids and in general relativity
- A Mission to Explore the Pioneer Anomaly
- Einstein-Aether Theory
- Naturalness of the Vacuum Energy in Holographic Theories
- The Cosmological Constant
- On making predictions in a multiverse: conundrums, dangers, and coincidences
- A speculative relation between the cosmological constant and the Planck mass
- Holographic Vacuum Energy
- Fat Branes in Infinite-Volume Extra Space
- Stability of a cosmological model with dynamical cancellation of vacuum energy
- Cosmological Constant and Fermi-Bose Degeneracy
- Gravity in the dynamical approach to the cosmological constant
- Brane Universes and the Cosmological Constant
- Back-Reaction of Cosmological Perturbations in the Infinite Wavelength Approximation
- Cosmological Constant Problem
- Doppler peaks and all that: CMB anisotropies and what they can tell us
- On contributions of fundamental particles to the vacuum energy
- Basic Constituents of the Visible and Invisible Matter - A Microscopic View of the Universe
- Comment on the "Influence of Cosmological Transitions on the Evolution of Density Perturbations"
- Heavy neutrino dark matter in the solar system
- Scale invariant gravity and the quasi-static universe
- Issues on the cosmological constant
- What does Quantum Field Theory in Curved Spacetime Have to Say about the Dark Energy?
- The Dark Side of the Universe
- Higgs Mechanism and the Structure of the Energy-Momentum Tensor in Einstein Gravity and Conformal Gravity
- The picture of our universe: A view from modern cosmology
- A Newtonian Model for the Quantum Gravitational Back-Reaction on Inflation
- Reply to `Comment on ``The influence of cosmological transitions on the evolution of density perturbations'' '
Cited by in corpus (16)
- f(R,T) Cosmological Models in Phase Space
- Density Perturbations for Running Cosmological Constant
- Effective Potential in Curved Space and Cut-Off Regularizations
- Consequences of energy conservation violation: Late time solutions of subclass of gravity using dynamical system approach
- Constraining noncommutative field theories with holography
- Dark Energy from graviton-mediated interactions in the QCD vacuum
- Aspects of Infrared Modifications of Gravity
- Quantum backreaction in evolving FLRW spacetimes
- Gaugessence: a dark energy model with early time radiation-like equation of state
- Effect of the Trace Anomaly on the Cosmological Constant
- Foundations of a theory of quantum gravity
- Quantum Yang--Mills Dark Energy
- Macroscopic effect of quantum gravity: graviton, ghost and instanton condensation on horizon scale of the Universe
- Chameleonic equivalence postulate and wave function collapse
- The Dark Universe Riddle
- A vacuum component of the Universe must evolve