UNIFICATION OF PHYSICS

A FUN SPECULATION: THE STRAND MODEL

 
Physics textbook Fun Discussion Impressum first version:
March 2008
this version:
1 October 2009

The strand modelOpen issues in physics in 2000PredictionsEnjoying physicsManuscriptsTalk slides
 

If you enjoy playing with ideas and then checking them against the real world, you might like the following.
 

pdf  SIXTH VOLUME:   A SPECULATION ON UNIFICATION   (9MB)   Includes predictions on masses, mixing angles and coupling constants. Requires Adobe Reader 8, allows adding comments in Adobe Reader.
        1 From millennium physics to unification 17
        2 Physics in limit statements 22
        3 General relativity versus quantum theory 48
        4 Does matter differ from vacuum? 54
        5 What is the difference between the universe and nothing? 76
        6 The physics of love - an intermediate report 99
        7 The shape of points - extension in nature 109
        8 The basis of the strand model 140
        9 Quantum theory of matter deduced from strands 155
        10 Gauge interactions deduced from strands 194
        11 General relativity deduced from strands 233
        12 Particles and their properties deduced from strands 257
        13 The top of the mountain 303

 
This page presents an approach to unification with a simple basis but intriguing implications. The model is based on featureless strands and sums up textbook physics in a single postulate: events and Planck units are crossing switches of strands. Surprisingly, this postulate allows to deduce Dirac's equation (from the belt trick), the principles of thermodynamics, and Einstein's field equations (from the thermodynamics of strands). They all follow as low-energy approximations of processes at the Planck scale. In particular, strands explain the entropy of black holes.

As a further surprise, in the same approximation, the postulate yields the three gauge groups and the Lagrangians of quantum electrodynamics, of the weak and of the strong interaction as a consequence of the three Reidemeister moves. The strand model does not permit any further interaction, gauge group or symmetry group.

As a final surprise, the postulate predicts three fermion generations and that no unknown elementary particles exist in nature. The strand model thus predicts that the standard model, with slight corrections for longitudinal W and Z boson scattering, is the final description of particle physics.

A natural method for the calculation of coupling constants, particle masses and mixing angles appears. Mass sequences, some mass ratios and the weak mixing angle are predicted correctly. For manuscripts and talk slides, see below.

The strand model seems to satisfy all the requirements for a unified description of nature. In particular, the strand model is based on Planck units, uses neither continuity nor discreteness as fundamental concepts, and does not assume that points or sets exist at Planck scales. The model has no free parameters, seems to be unique, seems to be unmodifiable, and works in three spatial dimensions. However, dimensionality is not a parameter, but a result of the model. The strand model also fulfils a famous wish: it fits on a T-shirt.

Discussions are possible on the fun discussion wiki.

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Open issues in fundamental physics in the year 2000: the millennium list

This is the full list of questions that were unsolved in fundamental physics in the year 2000, the so-called millennium list of open issues. A unified description of nature must solve all these questions. The internet and the research literature propose many such lists; they are all contained in this one.

OBSERVABLE    PROPERTY UNEXPLAINED IN THE YEAR 2000   
α 1/137.0359991(1), the low energy value of the electromagnetic coupling constant
αw the low energy value of the weak coupling constant
αs the value of the strong coupling constant at one specific energy value
mq the values of the 6 quark masses
ml the values of 6 lepton masses
mW the value of the mass of the W vector boson
mH the value of the mass of the scalar Higgs boson
θw the value of the weak mixing angle
θ12, θ13, θ23 the value of the three quark mixing angles
δ the value of the CP violating phase for quarks
θ'12, θ'13, θ'23 the value of the three neutrino mixing angles
δ', α1, α2 the value of the three CP violating phases for neutrinos
3 x 4 the number of fermion generations and of particles in each generation
J, P, C, etc. the origin of all quantum numbers of each fermion and each boson
c, ħ, k the origin of the invariant Planck units of quantum field theory
3+1 the number of dimensions of physical space and time
SO(3,1) the origin of Lorentz and Poincaré symmetry (i.e., of spin, position, energy, momentum)
S(n) the origin of particle identity, i.e., of permutation symmetry
U(1) the origin of the electromagnetic gauge group (i.e., of the quantization of electric charge, as well as the vanishing of magnetic charge)
SU(2) the origin of weak interaction gauge group and its breaking
SU(3) the origin of strong interaction gauge group
Ren. group the origin of renormalization properties
δW = 0 the origin of wave functions and of the least action principle in quantum theory
W = ∫LSM dt the origin of the Lagrangian of the standard model of particle physics
0 the observed flatness, i.e., vanishing curvature, of the universe
1.2 ⋅ 1026 m the distance of the horizon, i.e., the ‘size’ of the universe
ρde = Λc4/(8πG) ≈ 0.5 nJ/m3 the value and nature of the observed vacuum energy density, dark energy or cosmological constant
(5 ± 4) x 1079 the number of baryons in the universe, i.e., the average visible matter density in the universe
f0(1, ..., c. 1090) the initial conditions for c. 1090 particle fields in the universe (if or as long as they make sense), including the homogeneity and isotropy of matter distribution, and the density fluctuations at the origin of galaxies
ρdm the density and nature of dark matter
c, G the origin of the invariant Planck units of general relativity
δ∫LGR dt the origin of curvature, of the least action principle and of the Lagrangian of general relativity
R × S3 the observed topology of the universe

As shown in the sixth volume of the Motion Mountain text, the strand model proposes an answer to each of these open issues. Each answer follows unambiguously from the single, basic postulate that strand crossing switches define the Planck units.

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Some predictions of the strand model (with their timing), made before conclusive experiments (at the LHC, on neutrinos, on electric dipole moments, about QCD, on dark matter searches, and in astrophysics):

  • No additional elementary particle will be discovered: the Higgs boson does not exist. The unitarity of scattering for longitudinal W and Z bosons is maintained at all energies. (On website and 6th volume, August 2009.)
  • Non-local and non-perturbative effects in longitudinal W and Z boson scattering will be observed. (On website and 6th volume, October 2009.)
  • Gauge couplings, particle masses, mixing angles and their running can be calculated with help of knot, polymer or cosmic string simulation programs. (Website, March 2009, manuscript 4 and 6th volume.)
  • All neutrinos have mass and differ from their antiparticles. Neutrinoless double-beta decay will not be observed. (On website and 6th volume, August 2009.)
  • Hadron form factors can be calculated ab initio. (On website and 6th volume, October 2009.)
  • The light scalar mesons are mostly tetraquarks; knotted two-quark states and knotted glueballs are ruled out. (Website, November 2008, and 6th volume.)
  • The probable non-existence of glueballs needs a better argument. (Website, October 2008, changed to opposite in April 2009; see manuscript 4 and the 6th volume.)
  • Dark matter is compatible with the standard model. Dark matter detectors will not detect anything new. (Website, September 2008, and the 6th volume.)
  • The electric dipole moment of elementary fermions is of the order of the Planck length times the elementary charge. (Website, November 2008, and manuscript 4.)
  • The quark mixing and the neutrino mixing matrices are unitary. (Website, November 2008, and 6th volume.)
  • The coupling constants, particle masses and mixing angles are constant in time. (Website, November 2008, manuscript 4 and 6th volume.)
  • There are only three fermion generations. The proton and the positron charge are equal. (Website, November 2008, and 6th volume.)
  • The highest chromoelectric (and chromomagnetic) field in nature is given by the highest force divided by the colour charge; similar limits exist for the weak interaction. The limits can be checked in neutron/quark stars or other astrophysical objects. (Website, September 2008, and manuscript 4.)
  • No gauge groups other than those of the standard model exist in particle physics. No form of GUT, technicolour or supersymmetry is valid. No other interaction exists. Protons do not decay. (Website, August 2008, manuscript 4 and 6th volume.)
  • No additional elementary gauge bosons, preons, superpartners, magnetic monopoles, axions, sterile neutrinos, additional fermion families or leptoquarks exist. (Website, August 2008, manuscript 4 and 6th volume.)
  • No additional spatial dimensions, fermionic coordinates, non-commutative spacetime or different vacua exist in nature. No dilaton exists. (Website, August 2008, and manuscript 4.)
  • No quantum gravity effect will ever be observed - not counting the cosmological constant and the masses of the elementary particles. (Website, September 2009, and volume VI.)
  • No deviations from QCD and almost none from the standard model appear for any measurable energy scale. In particular, the strand model implies that SU(2) is broken and P, C and CP are violated in the weak interaction, and that SU(3), confinement and asymptotic freedom are properties of the strong interaction. Longitudinal W and Z scattering is slightly changed at LHC energies. (Website, August 2008, manuscript 4 and 6th volume.)
     
  • No deviations from quantum theory or quantum electrodynamics appear for any measurable energy scale. The QED energy dependence of the fine structure constant is reproduced. (Manuscript 3, April 2008, and manuscript 4.)
  • No deviations from thermodynamics appear for any measurable energy scale. (Manuscripts 2 and 3, April 2008.)
     
  • The universe's integrated luminosity is c^5/4G. (Manuscript 2, April 2008.)
  • If the cosmological constant is nonvanishing, it decreases with time. (Manuscript 2, April 2008.)
  • If the cosmological constant is nonvanishing, minimal electric and magnetic fields, a minimum force and a minimum acceleration exist. (Manuscript 2, March 2008.)
  • The universe has trivial topology at all measurable energies. (Manuscript 2, April 2008.)
  • No singularities, wormholes, time-like loops, negative energy regions, cosmic strings, cosmic domain walls, information loss, torsion or MOND exist; inflation did not occur. (Manuscript 2, April 2008.)
  • No deviations from special or general relativity appear for any measurable energy scale. No doubly or deformed special relativity arises in nature. (Manuscript 2, April 2008.)
     
  • There are maximal electric and magnetic fields in nature. (Manuscript 1, March 2008.)
  • No deviations from electrodynamics appear for any measurable energy scale. (Manuscript 1, March 2008.)
     
  • The Planck values are the smallest measurable length and time intervals, the Planck momentum and energy are the highest measurable values for elementary particles. A maximum curvature exists and the generalized indeterminacy principle holds. (As predicted by many.)
  • The highest force and power values measurable locally in nature are c^4/4G and c^5/4G. (Proved independently by Gary Gibbons, and suggested by several others.)
  • The smallest entropy in nature is given by k ln 2. (As stated by many.)
  • The quantum of action, hbar, is the smallest action value measurable in nature. (As stated by Niels Bohr.)
  • The speed of light, c, is the highest energy speed measurable locally in nature. (As stated by Hendrik Lorentz, Albert Einstein and others.)

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Enjoying physics

Unification on a T-shirt? Yes. Therefore, the text is for all those who enjoy physics and nature. The text is not for those who mix physics with ideology. What group do you belong to? The test is simple: if you enjoy physics and nature, the text will make you curious; if you are a prisoner of ideology, the text will make you angry.

Scientists have odious manners, except when you prop up their theory; then you can borrow money off them.

Mark Twain

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Manuscripts

1. Classical electrodynamics and photons in flat and curved space-time deduced from extended entities (C. Schiller) - NOTE: this mansucript is superseded by the chapters on quantum theory and on gauge interactions in volume VI that can be downloaded above.

Abstract: Classical electrodynamics - including Coulomb's law, interference, relativistic invariance and the full Maxwell's equations - is deduced from a simple model based on featureless extended entities. Quantum effects are described as results of the extension of the fundamental entities. The model describes the photon, including its spin and its quantum behaviour. The model also works in curved space-time; it reproduces the known results for high curvature, such as black-hole radiation and the Fulling-Davies-Unruh effect. Maximum values for electric and magnetic fields in nature are predicted, and the power limit for light and energy sources is confirmed. A new type of underlying symmetry is predicted.

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2. General relativity, gravitons and cosmology deduced from extended entities (C. Schiller, April 2008) - NOTE: this mansucript is superseded by the chapter on general relativity in volume VI that can be downloaded above.

Abstract: Einstein's field equations are deduced from a model of space-time based on featureless extended entities. Curvature is built from defects in space-time. In addition, extended entities yield a model for matter, for horizons and for the graviton, including its spin value. The model reproduces all known quantum-gravity effects, all black-hole properties - including a logarithmic correction to the black-hole entropy and a clarification of the Barbero-Immirzi parameter - and holography. The model predicts a minimum length, a maximum curvature, the absence of singularities, the generalized uncertainty principle, and the absence of effects of doubly special relativity.

   The extended-entity model also yields a new approach to cosmology, predicts the existence of a cosmic horizon, and proposes an alternative to inflation and modified Newtonian dynamics. The predicted values of the present particle density and of the present cosmological constant agree with experiments. The cosmological constant is predicted to decrease with time. The model provides a natural explanation of dark energy. The acceleration value at which rotation curves in galaxies deviate from the inverse-square law is predicted to vary with distance. A minimum momentum, a minimum force, a minimum electric and magnetic field and a minimum power are predicted to exist in nature. The fluctuations of the cosmic background radiation are expected to be scale-invariant.

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3. Quantum theory and quantum electrodynamics deduced from extended entities (C. Schiller, April 2008) - NOTE: this mansucript is superseded by the chapters on quantum theory and on gauge interactions in volume VI that can be downloaded above.

Abstract: It is argued that Schrödinger's and Dirac's equations can be deduced from a topological model of matter and photons based on featureless extended entities. The wave function, spin and quantum phase have intuitive descriptions. The probabilities appearing in quantum measurements are compatible with the Kochen-Specker theorem and do not rely on non-contextual hidden variables. The model reproduces Heisenberg's indeterminacy relations and the Hilbert space structure, provides a topological explanation for entanglement, provides general models for matter, antimatter, and real and virtual particles, and explains electric charge quantization and minimal coupling. The Weinberg-Witten theorem is satisfied. The model provides a basis for stochastic quantization, for the entwined-paths model, and for Zitterbewegung. At high energies, the model predicts the lack of higher dimensions, a minimum intrinsic electric dipole moment, the absence of divergences, and maximal values for electric and magnetic fields. The fine-structure constant, including its energy dependence, is calculable; first crudely calculated bounds contain the experimental value.

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Pdf: 4. Deducing the three gauge interactions from the three Reidemeister moves (C. Schiller, March 2009) Note: the ideas of this manuscript, also available as arxiv.org/abs/0905.3905, are included in volume VI, which is downloadable at the top of this page.

We give one of the first known arguments for the origin of the three observed gauge groups. The argument is based on modelling nature at Planck scales as a collection of featureless strands that fluctuate in three dimensions. This approach models vacuum as untangled strands, particles as tangles of strands, and Planck units as crossing switches.
    Modelling vacuum as untangled strands implies the field equations of general relativity, when applying an argument from 1995 to the thermodynamics of strands. Modelling fermions as tangles of two or more strands allows to define wave functions as time-averages of strand crossings; using an argument from 1980, this allows to deduce the Dirac equation.
    When modelling fermions as tangled strands, gauge interactions appear naturally as deformation of tangle cores. The three possible types of observable core deformations are given by the three Reidemeister moves. They naturally lead to a U(1), a broken and parity-violating SU(2), and a SU(3) gauge group. The corresponding Lagrangians also appear naturally.
    The model is unique, is unmodifiable, is consistent with all known data, and makes numerous testable predictions, including the absence of other interactions, of grand unification and of higher dimensions. A method for calculating coupling constants seems to appear naturally.

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5. Properties of elementary particles deduced from extended entities (C. Schiller) - NOTE: this mansucript has not yet appeared. It is an extension of the corresponding chapter in volume VI that can be downloaded above.

The properties and the numbers of elementary particles are deduced from the strand model. The strand model for quarks reproduces all their known properties, as well as those of hadrons; the strand model for leptons reproduces all their known properties.
    It is shown that the strand model allows only three generations of leptons and only three generations of quarks. The strand model implies the lack of Higgs bosons, additional gauge bosons, gluons, axions, majorons, superpartners and other hypothetical particles.
    Rough estimates for masses, mixing angles and coupling constants are given, and methods to calculate them are proposed.

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Talk slides

Pdf: Talk A. Deducing Maxwell’s, Dirac’s and Einstein’s field equations from fluctuating featureless strands (C. Schiller, July 2008)

Slides of a talk summarizing the manuscripts 1, 2, 3, including the experimental predictions of the model. In addition, the first seven slides present the foundations of the model.

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Pdf: Talk B. Deducing general relativity, cosmology and quantum gravity from strands (C. Schiller, August 2008)

Slides of a talk on the way to deduce the structure of the vacuum, special relativity, general relativity and cosmology from extended entities. Einstein's field equations and black hole entropy are derived. The slides summarize manuscript 2.

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Pdf: Talk C. Quantum mechanics, entanglement and QED deduced from strands (C. Schiller, July 2008)

Slides of a talk on manuscript 3. It also includes the way to model quantum entanglement of photons and matter particles as strand entanglement. Among others, methods to calculate masses of charged elementary fermions are presented.

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