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(GQR56) Accessibility–Ordering Invariants and Ladder Geometry in Driven Quantum Systems

JAMES SUTTON

Published Mar 14, 2026• 0 citations
Publisher

Abstract

Noncommuting generators of evolution impose ordering constraints on dynamical systems,restricting the set of admissible transitions. We introduce an Accessibility–Ordering Invariant(AOI) that captures this admissible ordering structure.Three manifestations of ordering geometry are examined in this work. First, ordered trans-port dynamics in graphene systems generate phase ladders in observables governed by a Flo-quet ordering relation. Second, newly identified Schr¨odinger–Heisenberg divisibility fracture inopen quantum dynamics produces ridge manifolds that obey the same ladder condition. Third,atomic-frequency-comb quantum memories exhibit spectral comb structures whose Fourier dualgenerates temporal ladder recurrence.These systems therefore realize a common ordering geometry expressed in conjugate phasecoordinates. In compact form the resulting ladder relations reduce toΓΛ ≈ nπ, tn = n∆ , n ∈ Z,revealing the dual appearance of phase ladders and Dirac-comb temporalis. Full 70 article programme https://github.com/jamessutton600613-png/GQR/blob/main/Programme_Index.md The programme contains both standalone and self referencing articles. These can all be read as notes in proof of GQR1.

DOI
10.5281/zenodo.19010824

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Noncommuting generators of evolution impose ordering constraints on dynamical systems,restricting the set of admissible transitions. We introduce an Accessibility–Ordering Invariant(AOI) that captures this admissible ordering structure.Three manifestations of ordering geometry are examined in this work. First, ordered trans-port dynamics in graphene systems generate phase ladders in observables governed by a Flo-quet ordering relation. Second, newly identified Schr¨odinger–Heisenberg divisibility fracture inopen quantum dynamics produces ridge manifolds that obey the same ladder condition. Third,atomic-frequency-comb quantum memories exhibit spectral comb structures whose Fourier dualgenerates temporal ladder recurrence.These systems therefore realize a common ordering geometry expressed in conjugate phasecoordinates. In compact form the resulting ladder relations reduce toΓΛ ≈ nπ, tn = n∆ , n ∈ Z,revealing the dual appearance of phase ladders and Dirac-comb temporalis. Full 70 article programme https://github.com/jamessutton600613-png/GQR/blob/main/Programme_Index.md The programme contains both standalone and self referencing articles. These can all be read as notes in proof of GQR1.
Ordered cycles of noncommuting operators can generate dynamical structures that have no ana-logue in commuting evolution. Using numerical simulations of graphene nanoribbon transport weidentify a universal oscillatory ladder structure in an ordering-sensitive observable. After subtract-ing the smooth response envelope, the residual oscillation collapses onto a universal cadence in theaccumulated phase variable Λ = ωnsteps, with spacing ∆Λ ≈ π. The ladder persists across ribbonwidths while its amplitude decreases with increasing transverse size, and it disappears entirely undersymmetric control cycles, confirming that the effect originates from operator ordering rather thanboundary interference.Reconstruction of the residual signal reveals that the ladder trajectories lie on a continuous phasemanifold generated by the ordered update dynamics. The ladder therefore provides a direct ob-servable signature of commutator-driven phase accumulation arising from the Baker–Campbell–Hausdorff expansion. This geometric phase structure is closely related to the ordering phenomenaunderlying recently identified Schr¨odinger–Heisenberg divisibility fractures in noncommuting quan-tum evolution [1]. The resulting phase manifold exhibits a Dirac-like dispersion geometry in the(Λ, ny) parameter space, linking operator ordering, Berry-type geometric phase accumulation, anddriven quantum dynamics within a single observable ladder structure. Full 70 article programme https://github.com/jamessutton600613-png/GQR/blob/main/Programme_Index.md The programme contains both standalone and self referencing articles. These can all be read as notes in proof of GQR1.
Recent work has shown that divisibility of quantum dynamical maps can differ betweenSchr¨odinger and Heisenberg pictures. In this work we investigate the geometric structure ofthis fracture in a minimal qubit model combining anisotropic contraction with time-dependentrotation. By analysing the singular values of the corresponding Bloch-space propagators weintroduce a singular-value gap field ∆(s, t) = σmax(MS(t, s)) − σmax(MH(t, s)) that quantifiesthe ordering asymmetry between the two intermediate maps. Numerical exploration revealsthat the fracture region in the (s, t) plane is organized by a system of ridge curves forminga comb-like structure. When expressed in terms of the phase difference ∆θ = θ(t) − θ(s),these ridges collapse onto an approximately periodic ladder condition reminiscent of Floquetresonances. The resulting geometry shows that the Schr¨odinger–Heisenberg divisibility fracturecan be interpreted as a phase-organized instability governed by a Floquet-like ladder of singular-value ridges modulated by anisotropic damping. Full 70 article programme https://github.com/jamessutton600613-png/GQR/blob/main/Programme_Index.md The programme contains both standalone and self referencing articles. These can all be read as notes in proof of GQR1.
Structured behaviour in systems governed by competing dynamicalprocesses remains poorly understood, particularly when the underlyingupdates do not commute. Here we introduce a minimal geometry-gatedframework in which local transformations are filtered by an accessibilityfunctional defined over a spatial manifold.This simple selection rule produces states exhibiting simultaneous spa-tial ordering and global phase coherence, together with a discrete ladder-like organisation in spectral space. Across parameter space, the dynamicspartition into quantised branches characterised by commensurability con-straints and structured defect formation.Analysis reveals that these behaviours are governed by a hierarchyof emergent laws: an intrinsic branch-dependent stability landscape anda mismatch-driven defect contribution that scales with geometric incom-mensurability. Transitions between branches exhibit hysteresis, indicatingpath-dependent selection and effective dynamical memory.These results demonstrate that geometry-conditioned accessibility aloneis sufficient to generate quantisation, selection, and memory in noncom-mutative systems. The framework connects naturally to geometric phase,Floquet dynamics, and commensurability phenomena, and suggests a min-imal route to hierarchical organisation across physical and complex sys-tems. Full 70 article programme https://github.com/jamessutton600613-png/GQR/blob/main/Programme_Index.md The programme contains both standalone and self referencing articles. These can all be read as notes in proof of GQR1.
Transport is commonly modelled using static or time-averaged connectivity, implicitlyassuming that pathways exist continuously. We show that when connectivity itself is tran-sient and enabled sequentially by accessibility constraints, time ordering becomes irreducible:outcomes produced by ordered accessibility schedules cannot, in general, be reproduced byany static or averaged description. Using minimal quantum and Markovian models, we pro-vide explicit counterexamples, robustness results on open parameter sets, and closed-formexpressions demonstrating strict order dependence even under strong dephasing or fullymemoryless dynamics. These results identify a finite-time regime in which equilibrium intu-ition fails and clarify the distinction between tunnelling through static barriers and transportdriven by temporal reorganisation of accessible state space. Full 70 article programme https://github.com/jamessutton600613-png/GQR/blob/main/Programme_Index.md The programme contains both standalone and self referencing articles. These can all be read as notes in proof of GQR1.
Cavity-enhanced atomic frequency comb (AFC) quantum memories are typicallyanalyzed in terms of spectral preparation and cavity efficiency. However, geometric toleranceand optical coherence jointly determine quantum admissibility. We introduce a coupledgeometry–coherence admissibility framework in which strain-induced inhomogeneity reduceseffective coherence time 𝑇2,eff , while cavity-induced ridge drift defines a geometric toleranceratio 𝜌. We show that quantum operation requires simultaneous satisfaction of geometric andcoherence constraints, yielding a dominance decomposition and collapse boundary in strainspace. The framework clarifies how cavity design and material coherence budgets jointly boundachievable storage times. Full 70 article programme https://github.com/jamessutton600613-png/GQR/blob/main/Programme_Index.md The programme contains both standalone and self referencing articles. These can all be read as notes in proof of GQR1.
Abstract: Atomic frequency comb (AFC) memories employ periodic spectral absorptionstructures that produce delayed photon echoes through collective rephasing of atomic excitations.Recent modelling studies have examined robustness limits of cavity-enhanced rare-earth AFCsystems from a geometric tolerance perspective, identifying dimensionless stability criteria foradmissible operating regions. Here we present a complementary dynamical framework that linksthe spectral comb structure directly to the temporal impulse response of the medium.Starting from a frequency-domain description of the comb absorption profile, we reconstructthe complex transfer function and show that periodic spectral geometry generates a temporallyrecurrent impulse response with peaks separated by 1/Δ, where Δ is the comb spacing. Convolu-tion with arbitrary input pulses reproduces the characteristic AFC echo dynamics and enablesdirect evaluation of retrieval efficiency. Numerical simulations recover three key AFC properties:deterministic echo timing 𝑡echo = 1/Δ, efficiency scaling governed by comb finesse 𝐹 = Δ/𝛾,and the influence of cavity bandwidth on retrieval efficiency.The results provide a unified description connecting spectral comb geometry, impulse responserecurrence, and echo formation in AFC memories. This perspective complements previoustolerance analyses by revealing the dynamical origin of echo recurrence and offers a compactframework for analysing and designing comb-based quantum memories. Full programme https://github.com/jamessutton600613-png/GQR/blob/main/Programme_Index.md The programme contains both standalone and self referencing articles. These can all be read as notes in proof of GQR1.