Previous works have shown that bilocal constraint geometry naturally gives rise to twodistinct geometric structures.The radial sector generates a distinguished one-dimensional characteristic flowinterpreted as relational time, whereas the angular sector reduces to a symplecticorbit carrying an internal Hamiltonian symmetry. The present work investigates the next natural step of this construction.Instead of interpreting the reduced orbit merely as a classical internal state space,we propose that it should be regarded as the classical precursor of a quantum statespace. Starting from the reduced symplectic orbit obtained by presymplectic reduction,we show that its geometric quantization naturally leads to a Hilbert space associatedwith every bilocal relation.After localization over spacetime, these Hilbert spaces form a bundle of quantumstates whose sections play the role of wave functions. Within this framework, neither time, gauge fields, nor Hilbert space are introducedas fundamental structures.All three emerge from the geometry of bilocal constraint orbits through differentstages of the same relational construction.
In the bilocal space
R3,3, quantum time can be defined as the distance between two states of the same particle. This construction leads to the Minkowski interval
ds2=t2−r2and to the interpretation of
t as a time coordinate emerging geometrically. In the present paper we develop the dual side of this construction by introducing the gradient energy operator
E^=−iℏ(∇2−∇1).We show that the time and gradient energy operators form a canonically conjugate pair:
[t^,E^]=2iℏ,which leads to a relational uncertainty principle of the time--energy type
ΔtΔE≳ℏ.At the same time the intervals
(t,r) and
(E,p) form two equivalent Minkowski spacetimes arising from a single bilocal geometry. This formalism reveals a hidden geometric structure of quantum theory, in which time, energy and mass appear as emergent quantities resulting from relations between states.
We present a three-level organization of a bilocal relational theory inwhich structures usually associated with quantum mechanics arise atlogically distinct stages. The first level is purely geometric. Starting from the bilocalconfiguration space
M×M and its canonical cotangent bundle,the relative sector admits a radial--angular decomposition. For
N=3,the angular phase space is
T∗S2. Its non-singular sector isnaturally organized as
R+×SO(3) and therefore possesses the canonical doublecover
R+×SU(2)≃C2∖{0}. A classical two-component
SU(2)-spinorial carrier thus appearsbefore any Lorentzian dynamics or quantum postulate; its identificationwith a Lorentz-covariant Weyl spinor is not assumed at this stage.Reduction at fixed internalCasimir yields the Hopf fibration with
∣c1∣=1. For
N=3, defining
pμ=(pt,P) and
μint=κ1+iκ2rewrites the full constraint as
pμpμ+∣μint∣2=0.Its Clifford factorization then admits an exact chiral first-order formwith a two-dimensional complex kernel. At this stage the constructionremains classical: the momenta are phase-space variables and the kernelspinor is not yet a quantum wave function.The third level promotes this geometric and dynamical structure toquantum spinor dynamics. Geometry supplies an integer topological classbut not a universal scale of action; the identification
I=nℏ/2 therefore requires the quantum scale
ℏ.Together with the operator rule
pμ↦−iℏDμ, the classical chiral factorization becomesa quantum Dirac-type equation. If the internal complex contributionadmits a sector or limit in which it reduces to a real constant
m, the standard massive Dirac equation
(iℏγμDμ−m)ΨD=0is recovered. The construction therefore separates three ingredients that arenormally introduced together: spinorial and topological statestructure, Lorentzian dynamics, and quantum operator dynamics. We donot derive quantum mechanics from classical geometry. Rather, we showthat the spinorial carrier and the algebraic architecture of the Diracequation can arise before quantization, while the quantum scale andoperator realization remain independent inputs. This identifiesprecisely which elements of quantum spinor dynamics are geometric,which depend on the Lorentzian dynamical postulate, and which remaingenuinely quantum assumptions.
We consider the bilocal formalism of quantum mechanics, in which the wave functiondefined on the space
Q×Q is interpreted as a description of two statesof the same particle.In contrast to earlier approaches, we do not assume the wave function to be scalar-valued,but instead allow it to take values in a finite-dimensional complex vector space. We show that changing the codomain of the wave function does not modify the structureof the configuration space nor its phase-space realization.The entire bilocal geometry, responsible for the emergence of spacetime,mass, and kinematical spin, remains unchanged.New structures appear exclusively at the level of the state-value space. The space of physical states then takes the form of the complex projective space
CPn−1, which is a natural symplectic manifold and a coadjoint orbitof the group
SU(n).For
n=2, the resulting geometry duplicates the structural spin spherealready present in the bilocal formalism, whereas the case
n=3 leads tothe first non-degenerate representational symmetry. These results suggest that internal symmetries of a representational naturecan be understood as consequences of the geometry of quantum state spaces,rather than as additional postulated degrees of freedom.
In the standard formulation of quantum mechanics, time appears as an externalevolution parameter rather than as an operator. In this work we analyze an alterna-tive perspective: time as an emergent quantity resulting from relations between twoquantum states of the same system. A pair of wave functions defines a point in the six-dimensional bilocal configuration space R3,3 , in which a natural “quantum distance”operator leads to an invariant with Minkowski structure ds2 = dt2 − dr2 .Constructing a basis adapted to this quantity yields a metric equivalent to M4 + S 2 —four-dimensional Minkowski spacetime coupled to an internal sphere of radius equal tothe quantum distance t. On this space we analyze the scalar field equations and showthat the spherical harmonics correspond to Klein–Gordon equations with geometric,time-dependent masses. The lowest modes l = 0, 1 form a four-component multipletwhich can be linearized in the spirit of Dirac, producing a first-order equation withadditional terms arising from the time-varying geometric mass.
Quantum hydrodynamics described by Madelung equations is analyzed in the framework of symplectic geometry i.e. in covariant phase space approach to geometric field theory. The pre-symplectic manifolds providing the phase spaces describing the Hamiltonian dynamics of quantum fluid are constructed from the set of all solutions of Madelung equations and their corresponding Lagrangian densities. The Madelung equations under consideration are the Madelung equations associated to Schroedinger equations (in the nonrelativistic case) and Madelung equations associated to Klein–Gordon equations (in the relativistic case). The cases where the coupling with electromagnetic fields is present are also considered here. Our symplectic formulation is different from that of [M. Spera, Moment map and gauge geometric aspects of the Schrodinger and Pauli equations, Int. J. Geom. Methods Mod. Phys. 13 (2016) 1–36] in the choice of fundamental fields or variables. Here we regard density function [Formula: see text] and phase function [Formula: see text] not as canonical pair but as the fundamental fields of the theory. The Hamiltonian vector fields corresponding to an observable are obtained from the Hamiltonian equation generated by the observable. The Poisson bracket of two observables then is determined by the Hamiltonian vector fields associated to each observable. In general, the Poisson bracket of two observables is not unique due to the fact that every observable has more than one corresponding Hamiltonian vector field. It is pointed out that the Poisson bracket has a unique value over a certain subset of the set of all observables defined on the pre-symplectic manifold of the Madelung equation under consideration.