Cosmological BF Theory on Topological Graph Manifold with Seifert Fibered Homology Spheres ()
1. Introduction
Gauge hierarchy and fine-tuning are relevant problems in particle physics and cosmology. New empirical discoveries may lead us to reconsider these concepts and their interconnections. First, the discovery of accelerated expansion of the universe by measuring luminosity of a distant supernovae [1] , with a cosmological positive constant:
, [2] [3] which is inconsistent with
. Second, the observation at LHC of Higgs boson as a particle with mass of 126 GeV. This suggests that the SUSY breaking scale is considerably higher than the electroweak scale. This gets complicated since QFT predict
to be 30 to 120 orders of magnitude larger than the experimental bound [1] . Also, string landscape and baby universes model predictions are not even close to experimental measures [4] [5] . Lately, new conceptions on the subject have been proposed in order to build cosmological models as well as field theories based on a different paradigm such as algebraic and geometric topology. Because of it, new horizons come to sight and bring cosmology based on topological manifolds, taking advantage of its already known properties. In this article, we propose a path to theoretically calculate
in a precise way compared with late measurements. Starting from mathematical-physics development method found in [6] , a topological BF theory is built over Seifert (Brieskorn) fibered homology spheres. The purpose of this effort is to describe physically the topological properties of the cosmology model, and also show how it is possible to obtain a coupling constant hierarchy as a result of it. Mathematics and geometry of the model are given by Brieskorn-Seifert fibered spheres (B-Sfh from now on) connected by a graph manifold, which is going to be the mathematical support and also, the core of the method. This article is structured as follows: Section 2 is about general BF theory and its construction on Manifold M. In Section 3, we show how it is possible to attach cosmological properties to a topological BF (field) theory. In Section 4, results and analysis are given, specifically about model predictions. Section 5 presents conclusions, a final recapitulation and suggestions for further work.
2. Topological BF Theory on a Manifold M
Background field theory is constructed as follows:
where
are
connection 1-forms and
dual 1-forms.
are locally Abelian potentials. Also 2-forms
,
y
belong to concatenated de Rham cochain
.
,
and
will be obtained and defined from mathematical method on further steps in this section. Now we introduce 7-dimensional BF action:
and
remain invariant under Gauge transformations
;
; and
;
. Breaking of symmetry is given by the Gauge condition results in:
then we obtain calibration action [5] :
Transformations as a generalization for Gauge symmetry are written as:
with
(topological superconductivity) and
, both closed 1-forms. This is a generalisation for Gauge symmetries of topological action on matter [7] . Variation on
gives Klein Gordon equations:
where
is topological mass. Topology is involved in Yang-Mills gap mass phenomenon since mass is characterized from base state of topological fluids and determines empty low energy density. Therefore, we get a topological field theory with a Chern-Simmons class [8] :
Chern-Simmons classes over orbifold
, in space (manifold) M are associated to
V-bundle. Due to Chern-Simons gauge theory it is possible to connect Seifert fibered manifolds possessing
-invariant contact structures (in general a
-action) with Seifert invariants too [5] [9] .
2.1. Graph Manifold over Seifert Fibered Space
We define a Seifert fibered homology sphere ( [10] ) as:
[11] . Let
be Seifert-Brieskorn fibered homology spheres (B-Sfh) with primary sequence [5] :
where
is the i-th prime number (i.e.
), and choosing numbers [5] as fiber parameters (
). Prime number sequence has been chosen in [5] . Then B-Sfh’s may be generated by:
which is named in [5] as “k” derivative, and it generates successive B-Sfh’s and set them into a tree graph (Figure 1) as it describes in [6] . k-derivative sequence is built with fibered Seifert space generation [10] . Seifert invariants may be written of the form
. Applying plumbing as a topological operation among B-Sfh’s we write the condition:
which secures further graph-matrix elements to be positive definite. In the other hand, proposed graph
has a tree open structure with plumbed B-Sfh’s contained in it [5] [6] . For plumbed graph
we may extract other topological structures such as lens space [12] which is a 3-D invariant structure emergent from plumbed graph. It may be defined as
which is the set of quotient
Figure 1. Graph manifold plumbing graph.
spaces of
by actions
. i.e., let p y q co-prime integers and consider
as unitary sphere en
. Then action
in
is generated by
. Relation between orbital Seifert invariants with Euler numbers and Lens Spaces parameters p and q comes from
,
which characterized a solid tori
generated by plumbing among graph
nodes
y
.
are Euler integer numbers defined for internal chain, and they are related to Seifert invariants, with Euler’s formula:
plumbing operation on graph
may connect B-Sfh’s as we look in Figure 2.
Besides, invariants identify new lens spaces additional
and are a bound component of a 4D V-Cobordism with available formulas for
y
[13] . Now a single graph manifold
may be constructed over lens spaces glued in disjoint union thru JSJ (Jacko-Shalen-Johansen) decomposition [14] as it is proposed in [5] . Therefore
would have a JSJ covering conformed by R pieces
with Seifert defined fibrations characterized by 1-forms
. Then
is a subcollection of the Waldhausen graph structure [14] over Seifert fibered bundles
. Edges
contained in a chain
belongs to the set of parallel tori in en
. Choosing a tori
we define:
It is still possible to extend isotopy of natural Seifert structure to the whole Seifert fibration in
with exceptional fibers
. Indeterminations are removed as is shown in [5] . Thus,
with JSJ has to be:
lens spaces
may be rewrite in terms of JSJ covering for
obtained in [5] as follows:
Expressions for p and q are already given in terms of Seifert invariants. Disjoint union of lens spaces gives us a new topological layer defined as V-cobordism [5] . Furthermore, there is a topological graph manifold as a result.
2.2. Adjacency Matrix with Continued Fractions
We can extract an adjacency matrix of plumbing graph manifold using continued fractions as it is explained in [6] . Beginning with p and q we obtain:
which are continued fractions related to Euler numbers shown in Figure 2, its mechanism may be found in [15] . Now we take plumbing graph representation where it is clear that for
the set
has the form:
where
is a Seifert fibered tori with Seifert invariants
. We have also
and
Following expression representing the basis of the 1-form [16]
then integrals may be calculated along fibers [5] as:
Thus we get respective transforms among dual 1-forms:
(1)
Therefore, in expression:
integral gathered linking intersection numbers of fibered structures
and
define in solid tori
associated to lens space
(homeomorphism between this two lens spaces is a consequence of
[5] ). If we apply duality conditions [16] :
rational numbers
and
, are known as Chern classes with V-bundle associated with Seifert fibrations where invariant
is connected with forms
and
on lens spaces
y
respectively.
Let
be our graph manifold, we integrate it as:
Following condition assure that rational linking matrix is positive definite:
From [5] we have rational matrix elements:
(2)
Notice that these expressions are consistent with Chern-Simmons class formula, defined in Section 2. Now it is possible to write a general expression to represent rational linking matrix in terms of Euler numbers
belonging each one to a graph vertix
. This would be:
Rational linking may be structured as a block matrix such as it is illustrated in Figure 3.
Matrix
and its formulas help us to obtain a topological fluid filling factor
hierarchy. This matrix and its (partial) diagonalized version
may be obtained by Gauss-Neumann method [6]
3. Cosmological Approach
In BF theory, a simple model of Gauge interactions is a non trivial topological ensemble that modeled a 7-D space-time manifold. For
this is given by the disjoint union of lens spaces as a result of plumbing operations on graph:
Full space-time manifold is the cross product of a regular 4-dimensional manifold
with
,
, where internal 3-manifold belong to the family
with Waldhausen topology
[17] . Now, action
presented in Section 2 has different variants since rational linking matrix results. Different block matrices in adjacency matrix give us a boundary action
with action QHF (Quantum Hall fluid) related to matrix computing and its results (Section 4), and represents an action for topological fluids
where Hall states came from generalized states hierarchy [5] [18] .
is tridiagonal integer matrix and
, both characterized generalised hierarchy of Hall states. Also
is rational inverse matrix of
. Filling factor
describes conductivity
on topological fluid. Currents
are defined as
and motion equations given by:
and
where Hodge operator
is defined with respect to boundary
. Then we have
which is the equation of QH effect. Fractional topological fluids or insulators [18] [19] [20] in this model has an analogue structure to a quasi-particle hierarchy system in 4-D space-time described by bulk action [5]
Bulk action contains the mechanism for mass generation (topological order) effect [5] [21] . Now it is possible to rewrite BF action equations as
where
is the rational linking matrix
and BF model may be interpreted as a consistent matrix set of coupling constants
which describes a Gauge kind hierarchy of coupling constants with respect to a dimensional scale factors k.
3.1. Kaluza-Klein Winding
Field equations formulated in this section and the precedent are the building blocks for a mutidimensional cosmological model of Kaluza-Klein kind. Therefore, a global expression of our model in terms of rolled dimensions, and it may be expressed thru graph manifold (Seifert) spaces [5]
multidimensional space on time-space’s is formed by baby universes [5] , where they fill the set of disjoint homeomorphic manifolds
and
. These 4D space-time manifolds
and
are homeomorphic to
but have a different scale. Thus it is necessary to reduce dimension due integration over lens spaces where coupling constants set emerge
y
. Continued fractions in this particular case possess an absolute value higher than 1, therefore scales in 3D space belong to Planck suborder.
3.2. Generalized States Hierarchy
Following expressions describe low energy physics of topological fluids hierarchy with
and
respectively [5]
Topological fluids characterized charge vectors
and
, along with K-matrices define filling factors
;
, where
y
are inverse matrices of
and
respectively. If we pick
, then
; and choosing
we have that
. Finally, to select
the filling factor is given by
. Diagonal elements from rational linking matrix
may be rewritten thru its respective filling factors
, for
besides
;
. KIJ is the Gauge coupling constant matrix. Furthermore, for graph manifolds such as homology
-spheres next conditions are satisfied:
which is fine-tuning for coupling constants, and its universal for all of them [5] .
3.3. Cosmological Constant
is associated with a specific interaction depending on the discrete energy scale parameter e. For example, when e runs from 0 to 4 the cosmological constant
changes according to the following sequence:
. If we correspond the last value of the cosmological constant to the unit Planck scale, then the running cosmological constant is reduced to the Planck units and reads
[5] . The cosmological constant, understood as vacuum energy density, depends on the discrete energy parameter e.
4. Analysis and Results
The running cosmological constants acquire the sense of the vacuum energy scales associated with the topology changes of the extra dimensional space, which induce the unification of gauge interactions (Figure 4), given as a result a rational linking matrix. The diagonal elements of the matrix
(Figure 5) have a hierarchy very closed to the one of the dimensionless low energy coupling (DLEC) constants [22] . It is natural to suppose that diagonal elements of the other rational linking matrices
(as well as their eigenvalues, see [23] ) simulate hierarchy of the vacuum-level coupling constants
Figure 4. Coupling constant hierarchy table.
of the fundamental interactions acting in the states characterized by higher densities of vacuum energy (according to this hypothesis we refer to e as a discrete energy scale parameter). The cosmological constant problem strongly suggest the existence of fine-tuning mechanism, since the empirical energy density of cosmological vacuum is at least 60 orders of magnitude smaller than several theoretical contributions to it. Recall that in quantum field theory some contributions to the vacuum density are evaluated as follows (see [24] [25] ): from the standard theory
; from the low energy super-symmetry breaking scale
; from grand unification schemes
(depending on a model); from quantum gravity
. Within our framework an enormous fine-tuning for the cosmological constant is modeled owing to the topological properties of graph manifolds under consideration in [5] . Therefore, coupling constants hierarchy from the model, satisfies energy scale predicted by lately experimental recovered evidence such as mentioned at the intro. Note that in our model the “running cosmological constant” (or the sequence of vacuum energy scales) is associated with the last diagonal elements
rational linking matrices of the graph manifolds
and thus undergoes a change when the topology of extra-dimensional space is transformed. Therefore the cosmological constant, understood as vacuum energy density, depends on the discrete energy parameter e. This problem strongly suggests the existence of a fine-tuning mechanism, since the empirical energy density of cosmological vacuum is at least 60 orders of magnitude smaller than several theoretic contributions to it.
5. Conclusions
The hierarchy and fine-tuning of the gauge coupling constants are described on the basis of topological invariants (Chern classes interpreted as filling factors) characterizing a collection of fractional topological fluids emerging from three-dimensional graph manifolds, which play the role of internal spaces in the Kaluza-Klein approach to the topological BF theory [6] . Due to the method results, it is strongly argued that topological invariants in general (also in graph manifolds) may be closely related to BF theory and field physics of space-time. There are other interesting topological invariants, such as Casson invariant, Floer and De Rham cohomology as well as homotopy groups, which in case to be calculated or interpreted, may be helpful in the analysis of BF models, in order to extract cosmological constants to enrich model and predictions. It is also remarkable that a basic prime numbers sequence has been used to fill the Seifert fibered parameters. Other configurations on prime numbers sequence may be given to building a similar model with closely tied results. One of the most remarkable ideas given by this model is that mass gap problem may be solved by topological fluids hierarchy and its interpretations, starting with topological mass. This would be possible thanks to Seifert-Riemann surface research on Yang-Mills problem [22] . Theoretical description of the hierarchical systems such as fractional quantum Hall states and fractional topological insulators are based on the existence of a new state of matter characterized by a new type of order: topological order. These methods are applied not only to the description of three-dimensional phenomena such as quantum Hall effect, but also to four-dimensional systems connected with topological superconductivity or a topological confinement, without any spontaneous symmetry breaking pattern. As future work, this model can be quantized. It could be convenient to establish a defined metric for model to, cosmologically speaking, research the physical implications of black holes and space-time expansion starting from this space-time setup. Besides, the study of topological insulators and fine-tuning of Chern-Simmon classes on Gauge fields is interesting. Therefore, Yang-Mills mass gap problem can be addressed from fine tuning topological fluids (Quantum Hall states) system. As further work, the authors suggest trying different combinations of fibers for homology spheres in order to get wider and more precise results and predictions for our model. Also, it is possible to search for more physical quantities obtained from computing other topological invariants from those calculated in this paper, such as fundamental homology and homotopy groups from topological manifold M to interpret values in terms of physical constants.