### Beyond textbook physics

Welcome to Motion Mountain Research. The present,
grey-coloured pages propose a unified description of motion and of
fundamental physics – including quantum gravity – called the
*strand tangle model* or the *strand conjecture*, and compare its
consequences and predictions with experiments. Strands describe all of
nature with a single principle:

This principle allows deducing both the Lagrangian of general relativity and that of the standard model. Thus, the principle agrees with all experiments ever made. Above all, strands yield a number of new, previously unavailable explanations: strand explain the origin of the field equations, the origin of each elementary particle, the origin of each gauge interaction, the origin of each fundamental constant, the origin of wave functions, the origin of the three spatial dimensions, as well as the origin of the principle of least action itself.General relativity and the standard modelare due to fluctuating strands of Planck radius,for which each crossing switch yields a quantum of action.

An introduction is the pdf found at step 4.

For a simple introduction to strands in 12 one-minute steps, see here.

For the comparison of the strand conjecture with experiment, click here.

For the textbooks on conventional physics (green pages), go here.

For commented scientific publications and preprints about strands, read further.

● A structured publication overview

● Step 1: Maximum force

● Step 2: From maximum force to
unification

● Step 3: From strands to black holes, general relativity, and quantum gravity

● Step 4: The strand conjecture about quantum mechanics

● Step 5a: The strand tangle model for the standard model
of particle physics

● Step 5b: Quantum electrodynamics deduced from strands

● Step 5c: Quantum chromodynamics deduced from strands

● Step 6: Cosmology deduced from strands

● Physics background

● Acknowledgements

● Volume VI of Motion
Mountain

### Summary: what happens beyond the standard model?

1. **All observations and all equations of fundamental
physics** follow from fluctuating strands with Planck radius that reach
the cosmological horizon.

Particles are rational tangles of strands, wave functions are blurred strand crossing densities, black hole horizons are blurred weaves of strands, space is made of blurred criss-crossing strands, curvature is due to inhomogeneous strands, and the three gauge interactions are due to the three Reidemeister moves of strands.

Assuming that each strand crossing switch produces a quantum of action
ℏ, the complete standard model of particle physics and full general
relativity can be deduced. This includes deducing spinor wave functions,
Dirac's equation, electromagnetic fields, Maxwell's equations, the nuclear
interactions, the gauge groups U(1), SU(3) and broken SU(2), the particle
spectrum with its three generations, the Higgs mechanism, CP violation, the
quark model, QED, QCD, the full standard model Lagrangian (with Dirac
neutrino masses and PMNS mixing), curvature, the metric, Einstein's field
equations, the Hilbert Lagrangian, and cosmology. All deduced consequences
agree with all data. Strands predict – like textbook physics does and like Bronshtein's physics cube does – that
there is *no physics* beyond the standard model and beyond general
relativity. Detailed experimental predictions are found on the dedicated page. They agree with all experiments so far.

2. **All fundamental constants** – the number of dimensions,
unique coupling constants, unique particle masses and unique mixing angles
– follow from the strand tangle model. They can be
calculated.

3. **No observation remains unexplained** in fundamental physics.
Also the principle of least action is explained.

4. **No other, inequivalent model** yields these results.

### A structured publication overview

For an introduction, just read the text given in step 4.

The common explanation of both general relativity and the standard model of particle physics using strands arose in several steps.

Step 1 - The discovery of maximum force c^{4}/4G in nature implies a
simple description of general relativity.

Step 2 - Maximum force implies that unification is possible with strands in three spatial dimensions.

Step 3 - Strands imply the entropy of black holes, the field equations of general relativity, and a model for quantum gravity.

Step 4 - Strands imply that quantum theory and wave functions are emergent, and that nature can be seen as made of qubits.

Step 5 - Strands imply the standard model of elementary particle physics, including QED, QCD and the quark model, the weak interaction, the Higgs mechanism, the spectrum of elementary particles, and finally, the fundamental constants of nature.

Step 6 - Strands imply cosmology, provide many statements about dark matter, and explain dark energy.

Publications on each of these steps in professional physics journals and in a book have appeared or will appear.

### Step 1: Maximum force

The story started with the discovery, in the years 2000 to 2003, of
the maximum force value c^{4}/4G in nature, by Gibbons and, independently, by
the present author. In the past decades, a few papers tried to refute the
result; over twenty papers by various groups across the world have
confirmed it and corrected the apparent refutations. The author is also
the discoverer of the *principle* of maximum force, i.e., of the
result that general relativity can be completely deduced from nature’s
limit c^{4}/4G. The last papers by the author on the topic are

A. Kenath, C. Schiller and C. Sivaram, From
maximum force to the field equations of general relativity - and
implications,
*International Journal of Modern Physics D* 31
(2022) 2242019, 10.1142/S0218271822420196.
This paper won an honourable mention in the 2022
Competition of the Gravity Research Foundation.
Download
the pdf here.

C. Schiller, Tests for maximum force and maximum power, Physical Review D 104 (2021) 124079. Preprint here.

C. Schiller, Comment on "Maximum force and cosmic censorship", Physical Review D 104 (2021) 068501 10.1103/PhysRevD.104.068501. Free preprint here.

C. Schiller, From maximum force via the hoop conjecture
to inverse square gravity, *Gravitation and Cosmology* 28 (2022)
305–307, 10.1134/S0202289322030082.
Download the
pdf here.

All deduced results on maximum force c^{4}/4G – or on the
equivalent maximum power c^{5}/4G, maximum mass flow rate
c^{3}/4G or maximum mass to length ratio c^{2}/4G –
agree with all observations so far, including those of the LIGO and Virgo
collaborations, and of all neutron star and pulsar measurements. All these
limits are equivalent; each one defines general relativity.

### Step 2: From maximum force to unification with strands

Unification with strands is deduced in simple terms in C. Schiller, From maximum force to physics in 9 lines and towards relativistic quantum gravity, published in Zeitschrift für Naturforschung A (2022) https://doi.org/10.1515/zna-2022-0243.

A deeper dive towards unification with strands, still accessible to every physicist, is C. Schiller, From the Bronshtein cube of limits to the degrees of freedom of relativistic quantum gravity.

These texts make clear predictions on how to pursue unification, and deduce the lack of possible progress in most other directions. In particular, they summarize all experiments ever made and show that unification takes place in three spatial dimensions, that unification must take into consideration the smallest length in nature, the double Planck length, and that the fundamental, common constituents of space and particles must be filiform, fluctuating and of Planck radius. In short, the texts show that the fundamental constituents of nature must be strands.

### Step 3: From strands to black holes, general relativity, and quantum gravity

The description of nature with strands reproduces the field equations and quantum gravity. This is shown in the following publications.

C. Schiller, Testing a conjecture on the origin of
space, gravity and mass, *Indian Journal of Physics* **96** (2022)
3047–3064. Read the published paper
online for free at rdcu.be/czpom. Dowload the
preprint here.

A dedicated discussion of the quantum gravity aspects of black holes appeared as a chapter in the book by A. Kenath ed., „A Guide to Black Holes“, Nova Science Publishers in January 2023: C. Schiller, Testing a microscopic model for black holes deduced from maximum force.

The first publication on gravitation from strands was C. Schiller, A conjecture on deducing general relativity and the standard model with its fundamental constants from rational tangles of strands, Physics of Particles and Nuclei 50 (2019) 259–299.

See also the dedicated page on quantum gravity.

**50 700 solar masses per second.** Strands provide a
microscopic model for space and horizons. This allows deriving the field
equations of general relativity and a model for quantum gravity. Numerous
tests of the strand conjecture in the domain of gravitation and quantum
gravity are deduced, starting from a single principle. All tests agree
with observations so far.

For example, strands confirm that gravitation – like nature itself
– has a power or luminosity limit c^{5}/4G,
a momentum flow or force limit c^{4}/4G,
a mass flow limit c^{3}/4G,
and a mass to length limit c^{2}/4G.
The limits are given by one
quarter Planck mass per Planck time, or 50 756 solar masses per second
(times c^{-1}, times c, or times c^{2}). No observation
ever exceeded these limits.

Many predictions about gravitons and quantum gravity are deduced, including a direct derivation of black hole entropy from strands. Above all, strands also explain the existence of gravitational masses of elementary particles, solve the hierarchy problem, and provide upper and lower limits for the mass values. All predictions agree with the data.

Strands seem to be the *simplest* quantum gravity proposal in the
literature. Strands *agree with and predict all observations:*
strands provide a microscopic model of space, black hole horizons and
gravitons, explain mass, particles and black hole radiation, imply general
relativity without modifications, prevent singularities and wormholes,
reproduce cosmology (see step 6), but predict the lack of elementary dark
matter particles. Strands are also *complete:* no question of quantum
gravity is unanswered.

Any complete description of nature has to be *strange*. To satisfy
this requirement for gravitation, the following animation, made by Jason
Hise, shows how black hole rotation is modelled in the strand conjecture.
(The flattening of the horizon at the poles is not shown.) With a bit
of imagination, you can determine the location of the ergosphere.

### Step 4. The strand conjecture about quantum mechanics

**Pedagogical.**
For physicists, the best introduction to the strand tangle model is the
preprint showing how wave functions, quantum theory, fermions and bosons,
the three gauge interactions, the three elementary particle generations and
unique elementary particle masses follow from strands.

**Wave functions and interactions.** A single principle is
used to derive the Schrödinger equation, the Pauli equation and the Dirac
equation. Spin 1/2, fermion behaviour, mass and, above all, the observed
elementary particles and the observed gauge interactions are deduced -
without any modification.

**Complete.** The strand tangle model explains why all
measurements are electromagnetic, why only massive particles can have
electric charge, why the spin-statistics theorem holds, and why the origin
of gauge interactions settles the Yang-Mills millennium problem. (The latter topic is also explained here.)
In short, it is shown that all "laws" of physics are uniquely defined,
without any possible variation or alternative. There is only one possible
universe.

**From 9 lines to 1 line.** In 2022, the strand tangle
model, with its one line, explains about 8.2 lines of the 9 lines that describe all of physics and of
nature. The strand tangle model also agrees with all experiments. The
remaining constants of line 9 still have to be deduced. The task is not
finished. But: no other theory in the literature has achieved this much.
(In fact, two other approaches have with similar results. The *octonion
model* by Singh, arxiv.org/pdf/2206.06911.pdf, and Connes'
*non-commutative geometry*, arxiv.org/pdf/1004.0464.pdf, both explain
more than 8 lines, but both appear to predict additional unobserved
particles. A more detailed evaluation
is found here.)

Using strands, nature is summarized in just 1 line: General relativity and the standard model are due to fluctuating strands of Planck radius, for which each crossing switch yields a quantum of action.

**Qubits.** The strand tangle model also shows how to
give concrete meaning to Zizzi’s expression “it from qubit”: qubits can be
modelled with strands. So can entanglement and decoherence. And gravity.

### Step 5a: The strand tangle model for the standard model of particle physics

**Beautiful.** When we look at the starry sky, we admire
the vast space, the coloured twinkling stars, and the deep blackness. The
strand conjecture proposes an explanation for their origin, their
properties and their motion. The foundations of what we find around us
– particles, space, horizons and colours of everything we see –
are explained.

C. Schiller, A conjecture on deducing general
relativity and the standard model with its fundamental constants from
rational tangles of strands, *Physics of Particles and Nuclei*
**50** (2019) 259–299. Download the published paper at
dx.doi.org/10.1134/S1063779619030055. Read the published paper online for free at
rdcu.be/cdCK7. Download the preprint here, with films.

**Testable.** The paper argues that modern physics
arises, directly and inevitably, from the Planck scale.
Below, the more pedagogical papers and preprints deduce
additional experimental predictions and tests.
A detailed list of tests is found on the bet
page, by clicking here.

**Simple.** The strand conjecture starts with deducing
Dirac’s equation from Dirac’s trick for tangles. Then, tangle
classification yields the particle spectrum. Tangle deformations yield,
via the Reidemeister moves, the particle gauge interactions groups U(1),
SU(3) and broken SU(2). Working out the details gives usual particle physics,
with no additions, modifications, or omissions.

C. Schiller, Testing a conjecture on the origin of the
standard model, *European Physical Journal Plus* **136** (2021)
79. Download it at doi.org/10.1140/epjp/s13360-020-01046-8. Read the published paper online for free at
rdcu.be/cdwSI. Download the
preprint here.

**Elegant.** It is regularly claimed that the standard
model is complex, incomplete or even ugly. The strand conjecture argues
the exact opposite: all of particle physics is due to tangled strands
fluctuating at the Planck scale. A *single* fundamental process
appears to explain the principle of least action, the Dirac equation, the
observed interaction spectrum, the observed gauge symmetry groups, the
observed elementary particle spectrum, and the fundamental constants
(masses, mixing angles, and coupling constants) describing them. The
Lagrangian of the standard model arises, without modifications. Over 100
additional tests and predictions about particle physics beyond the standard
model are deduced. They agree with all experiments. So far, no other
approach in the research literature appears to make (almost) any of these
predictions. Indeed, it appears that the explanation of the standard model
using tangled strands is consistent, complete, correct, hard to vary, and
unique. Above all, it is beautifully simple.

A list of experimental predictions is also found here.

### Step 5b: Quantum electrodynamics deduced from strands

C. Schiller, Testing a conjecture on quantum
electrodynamics,
*Journal of
Geometry and Physics* 178 (2022) 104551.
Download the preprint
here.

**Colours and beauty.** The strand conjecture shows how the
tangle model leads to quantum electrodynamics, including electricity,
magnetism and optics. Over 40 tests for the conjecture are given. So far,
they are all positive. In particular, the strand conjecture appears to
allow approaching two old challenges: how to calculate the fine structure
constant and how to calculate the lepton masses – both from first
principles. The preprint uses the tangle model of particles to deduce
estimates. The fine structure constant with its measured value
1/137.036(1) and the lepton masses,
in particular the electron mass, are the ingredients that determine all
colours, tastes, smells, sounds and most shapes around us. In other words:
it is argued that tangles of strands generate all beauty in
nature.

Presently, tangles lead to a crude estimate of the fine structure
constant that is correct within 30%. This is not good; but so far,
it is one of just two attempts worldwide to explain the value ab initio,
using a unified description of particle physics and general relativity.

**The spin of leptons.** Tangles of strands reproduce
spin. Leptons consist of three strands. The animation by Jason Hise gives
an impression:

**The spinning electron tangle.** Strands are not
observable, only crossing switches are. Every chiral crossing produces an
electric charge e/3. Jason Hise produced an animation for the spinning
electron (though neither the tangle nor the strands should be
flattened):

### Step 5c: Quantum chromodynamics deduced from strands

**Quarks and nuclei.** The strand conjecture shows how the tangle
model leads to the strong interaction, the quark model, gluon flux tubes,
confinement and asymptotic freedom. The existence (new in 2022) of
glueballs is predicted. Many other tests for the tangle model are deduced,
including the lack of new generations, the lack of CP violation and the
lack of deviations from QCD. All consequences agree with the data. In
particular, the strand conjecture allows estimating the strong coupling
constant and the quark masses ab initio.

**The spinning motion of the simplest tangle of
the down quark.** Jason Hise also produced the animation for this
case:

Indeed, the tangle model is peculiar – to say the least.

### Step 6: Cosmology deduced from strands

C. Schiller, Testing a conjecture on cosmology and dark energy (preprint).

**The universe.** This and a subsequent preprint on cosmology
complete the topic of gravitation. In the strand conjecture, the universe
consists of a single closed strand that forms the cosmological horizon and
also the particles and the space inside it. Over time, this strand gets
more and more tangled. (As one reader said: the universe plays cat's
cradle.) This description reproduces usual cosmology and leads to numerous
tests and predictions: the universe expands;
nothing – no matter, no radiation and no space – exists beyond
the cosmological horizon; inflation did not occur; there are no cosmic
strings and no higher dimensions; there is no non-trivial topology; there
is no bouncing universe; there is just *one* universe; the luminosity
of the universe is always limited by c^{5}/4G; dark matter made of
unknown elementary particles does not exist; if dark matter exists at all,
it is made of known matter or black holes or both; dark energy, or vacuum
energy, does exist and is a natural consequence of strands; the density of
vacuum energy, the cosmological constant, is small;
baryogenesis appears to be due to non-perturbative effects.

The strand description of cosmology is promising. However, calculating
the vacuum energy density remains a challenge.
Therefore, clarifying the relation to modified gravity and to the baryonic
Tully-Fisher relation remains a challenge as well.

### Physics background

**Maximum force and power.** The strand model is based
on a result that is older and unrelated to strands: the maximum force in
nature with the value c^{4}/4G. For details and publications, see the dedicated web page on maximum force and
maximum power.

*

**Parity violation** is illustrated in the videos on the topic.

*

**Technicalities.** The strand conjecture
reproduces the Lagrangians of the standard model and general relativity,
explains the number of generations and the particle spectrum,
deduces all Feynman diagrams and propagators,
explains the gauge groups U(1), SU(2) and SU(3),
explains the fundamental constants ab initio,
solves the hierarchy problem,
explains neutrino masses without a see-saw mechanism,
solves the strong CP problem,
predicts the validity of the standard model and of general relativity
up to the Planck scale without any intermediate energy scale,
implies that the weak interaction violates parity maximally,
explains the equality of proton and positron charge,
has no problems with anomalies,
predicts no issues with baryogenesis,
has no grand unification,
has no supersymmetry,
has no additional spatial dimensions,
has no inflation, no inflaton and no dilaton,
solves a number of black hole and singularity issues,
implies gravitational waves,
has no dark matter particles,
has a naturally small cosmological constant,
solves various problems with gauge theories,
answers Hilbert's sixth problem,
and explains the principle of least action.

*

**Fundamental principle - from text to graphics.**
General relativity and the standard model are due to
fluctuating strands of Planck radius, for which each crossing
switch yields a quantum of action:

*

**Particle tangles.**
Visualizations of the three simplest neutrino tangles:

Visualizations of the simplest tangles for the electron, the muon and the tau:

All these beautiful 3d visualizations were realized with Blender by Aleksandr, by Lucas and by Mitchell.

*

**Blog.**
The blog on research about fundamental physics
and tangles of strands tells more about general ideas, past mistakes,
objections, encountered difficulties, and progress.

*

**T-shirt.**
An important motivation has always
been the support for the ailing physics T-shirt industry.
For decades, it has been desperate for new designs.

*

**History.** The strand conjecture is a side result of the free Motion Mountain
physics book series, in particular of Dirac's spin 1/2 demonstration, of
the principle of maximum force, and of the strand explanation of back hole
entropy. Strands reduce the 9 lines describing textbook physics
to a single principle (that fits on a T-shirt), and make
clear predictions for experiments and calculations.
If you want to bet about the outcomes to evaluate
your chances, to comment, or if you want to help with animations similar to these, write to christoph@motionmountain.net.

### Acknowledgements

Several of these articles were supported by grants of the Klaus Tschira Foundation: Eur Phys J Plus, Indian J Phys, J Geom Phys, IJGMMP, Z f Naturf, dark energy preprint, emergent quantum theory preprint, first Bronshtein cube preprint.

### Volume VI of Motion Mountain

**Older work.** A more extensive, more passionate, but also
older and less precise presentation is the original text on the strand
model. It was written as a *research* volume that continues the
adventure of the five *textbook* volumes.