In standard physics the time t is an external parameter and is not itself defined, while the second is defined by counting the cycles of a periodic phenomenon. The two are tied together if time has an internal phase. This paper places as an axiom the unit complex quantity T=pf+i·fp, |T|=1, a unit vector rotating in the complex plane at a speed set by energy, and for a system at rest by the mass. Solving the rotation equation dT/dt=−i(mc²/ℏ)T for t gives t=(ℏ/mc²)∫i·dT/T=(N+φ/2π)h/(mc²), with N the rotation count, φ the fractional part below one rotation, and h/(mc²) the Compton period. The time of a system of mass m is thus the rotation count of its own internal phase. Conditions placed on the same equation yield the mass shell, Lorentz factor and metric signature of special relativity and the Schrödinger equation as solutions. The imaginary unit of quantum mechanics is identified with the generator of this rotation. The scale of time is the integer N, and φ appears only as a phase difference in interference. Earlier work places the clock outside the system, writes the internal oscillation as a function of an external t, or defines one time for many degrees of freedom. A defining equation of t for a single massive system from an internal phase of time itself is, to the author’s knowledge, new. From the fixing condition follow the quantum speed limit, the quantum Zeno effect, and a null test for atom interferometers.
In standard physics the time t is an external parameter and is not itself defined, while the second is defined by counting the cycles of a periodic phenomenon. The two are tied together if time has an internal phase. This paper places as an axiom the unit complex quantity T=pf+i·fp, |T|=1, a unit vector rotating in the complex plane at a speed set by energy, and for a system at rest by the mass. Solving the rotation equation dT/dt=−i(mc²/ℏ)T for t gives t=(ℏ/mc²)∫i·dT/T=(N+φ/2π)h/(mc²), with N the rotation count, φ the fractional part below one rotation, and h/(mc²) the Compton period. The time of a system of mass m is thus the rotation count of its own internal phase. Conditions placed on the same equation yield the mass shell, Lorentz factor and metric signature of special relativity and the Schrödinger equation as solutions. The imaginary unit of quantum mechanics is identified with the generator of this rotation. The scale of time is the integer N, and φ appears only as a phase difference in interference. Earlier work places the clock outside the system, writes the internal oscillation as a function of an external t, or defines one time for many degrees of freedom. A defining equation of t for a single massive system from an internal phase of time itself is, to the author’s knowledge, new. From the fixing condition follow the quantum speed limit, the quantum Zeno effect, and a null test for atom interferometers.
Quantum mechanics is built on the imaginary unit i, yet it does not say what that i physically is, and it treats time as an external parameter without internal structure. This paper places a single identification: time is a unit complex quantity with two orthogonal components, T = pf + i·fp (|T|² = 1), where pf is the fixed past, fp is the undetermined future, and i is the generator of the 90° rotation between them. From this identification, with the additional inputs counted explicitly (linearity of the evolution, inertial-frame invariance of the internal frequency, and local phase invariance), follow the structure of the Planck relation (E ∝ ω, amplitude-independent), the Schrödinger equation, the metric of special relativity and its signature, the electromagnetic gauge structure, the form of the Born rule, and the skeleton of the Dirac equation. Three consequences about time follow. First, "time" is two-layered: the rotating hand (the internal phase time T, which ticks proper time) and its winding number (the parameter time t). Second, the rate of the proper clock is an invariant of the worldline; observer-dependent energy cannot drive it; the clock is driven only by the invariant of the dispersion relation, the mass squared m². A state with non-positive m² becomes a "frozen envelope": it stores configuration energy while its proper phase does not rotate (the dynamics of its stability is disclosed as an open seam). Third, the arrow of time sits not in dynamics but in a modal asymmetry (undetermined → fixed). Around the threshold m² = 0 these consequences become distinguishable from the standard theory, and they connect to three companion papers: neutrinos (residents of the threshold), dark energy (the allocation of the cosmic phase), and dark matter (stranded states that failed ignition). Derivation, inheritance, and seam are distinguished throughout. complex time, internal phase of time, arrow of time, time in quantum mechanics, foundations of quantum mechanics, imaginary unit, Born rule, proper time, mass generation, Landau–Zener transition, Hopf fibration, neutrino mass, dark matter, dark energy
We present complex-time (CT) theory, a framework in which the fundamental structures of quantum mechanics are derived from three physical postulates concerning the internal structure of time. The postulates are: (P1) physical time possesses two orthogonal components — past-fixed (pf), representing actualized, irreversible records, and future-pending (fp), representing physically real but undetermined possibilities; (P2) pf and fp are orthogonal (pf fp); and (P3) the total temporal magnitude is conserved (pf + fp = 1). From these three postulates alone, we show that: (i) the state space is the unit circle and the dynamical group is , so that the imaginary unit arises as the unique generator of temporal evolution — not as a mathematical convenience but as a consequence of temporal geometry; (ii) the Schrödinger equation follows from the identification of energy with the rate of phase rotation in the pf–fp plane, with the Planck constant playing the role of a natural constant intrinsic to the pf/fp structure; (iii) the de Broglie–Einstein relation holds universally — for massive and massless particles alike — because the wave structure belongs to time itself, not to any particular particle; (iv) the uncertainty principle is a geometric consequence of the impossibility of fully eliminating fp while preserving ; (v) the complex structure of Hilbert space, the inner product, and the Born rule all follow from the geometry of fp pf projection; and (vi) energy quantization emerges from a “real-axis sampling” rule without imposing discreteness on the underlying dynamics. We further show that the CT framework provides unified descriptions of double-slit interference, quantum tunneling, unstable-state decay widths, and the structural origin of the arrow of time. Preliminary experimental predictions for quantum-circuit observables are stated, and applications to cosmological dark-energy phenomenology, galaxy rotation curves, and Lorentzian path-integral contour selection are outlined with references to dedicated companion papers. The central thesis is that quantum mechanics is not a theory of particles with mysterious wave-like properties, but a consequence of the internal structure of time — time whose wave-like phase (fp) is projected, irreversibly and discretely, onto the real axis (pf) in every act of measurement. Keywords: complex time; temporal structure; imaginary unit; quantum mechanics derivation; past-fixed / future-pending decomposition; Born rule; energy quantization; measurement; irreversibility; arrow of time
Abstract We propose a two-component structure of physical time based on a distinction between Past-fixed (pf) and future-pending (fp) contributions. pf time encodes events that have already been realized and recorded, while fp time encodes those possibilities that have not yet become facts but may do so. This structure is represented by a complex-time variable and a normalized complex amplitude with , where pf and fp denote, respectively, the pf and fpcomponents. In this framework the imaginary unit is interpreted as a generator of rotations between pf and fp, rather than as a purely formal algebraic device. We show that unitary quantum dynamics can be understood as the conservation of the combined pf – fp weight, and that the Schrödinger equation describes rotations of the complex-time amplitude with angular velocity . Measurement processes are described as projections from fp to pf, and we argue that the Born rule arises from natural symmetry and additivity requirements on the frequencies of such future-to-past conversions. For two-level systems, equal fp alternatives lead to equal pf frequencies; for rational amplitude ratios, fp can be decomposed into equal “future packets” whose uniform projection into pf yields probabilities proportional to the squared amplitudes. In higher dimensions, Gleason’s theorem implies that these conditions uniquely single out the usual Born rule. We further show that discrete energy spectra can be viewed as a consequence of sampling the complex-time rotation only at those instants where lies on the real axis, , at which fp vanishes and the corresponding mode is fully pf. This leads to a quantization condition that reproduces Planck-type discrete energies for simple systems. Finally, we interpret tunnelling and evanescent domains as manifestations of fp structure: from the pf perspective an infinite barrier still enforces , but from the fp perspective a particle that has not yet appeared in that pf spacetime may exhibit fp amplitudes that transiently extend into the barrier region. Taken together, these results suggest that the imaginary unit can be interpreted as a “future factor” in quantum theory, and that a complex-time geometry provides a coherent route to connect quantum dynamics, probability, and discrete spectra with the temporal status of physical reality. Running Title: What is Time? Complex-Time Geometry Key words: complex time; past-fixed and future-pending; time in quantum mechanics; Born rule; unitary dynamics; quantum tunnelling; quantum foundations
In Newtonian mechanics, one often thinks in terms of x(t) i.e. an association between x and t. Although this is part of Newtonian mechanics, the notion of motion always being linked to time (and so an internal clock being required) is not always the case. For example, two particles with different masses and different velocities such that their momenta are the same may strike a target and reflect with the same magnitude of momenta. The impulse is 2p for both even though they have different speeds. One does not need to consider their speed to discuss the impulse change and so an external clock is not needed. This is further emphasized by the Lorentz invariant A = -Et+px which separates x and t as if they were independent variables (even though implicitly a speed exists in the problem i.e. v=dx/dt.). The point is that there exists a subset of physics (i.e. interactions) which is not dependent on velocity and hence the presence of a clock. The impulse hit discussed above is one example, but interference through 2 slits etc is another. Two quantum particles with the same momentum, but different rest masses and velocities produce the same interference patterns. A particle with momentum, however, has energy and so both time and space are running variables, but there are problems in which one considers p without a clock. Interestingly, even if one thinks in terms of impulses without using a clock, if there is an x interval between impulses then the notion of velocity comes into play even without an external clock because there will be more impulses imparted by a fixed p with a higher velocity than a lower one in the same fixed time period. Without using the idea of a clock, this give rise to the observable called pressure in classical physics, but is also present in a quantum bound state, we argue. Pressure in classical physics is proportional to temperature which in turn is proportional to energy (and a running time). In a quantum bound state, the equivalent to pressure (namely impulse hits with a potential) also require an energy viewpoint which is linked to running time i..e exp(-i En t) where En is the bound energy.
Abstract This paper develops a unified theoretical framework in which time is formulated as an intrinsic complex-phase rotation eiθeiθ within an imaginary extension of spacetime.In this formulation, the imaginary unit ii is not a mere mathematical symbol but the operator of indeterminacy, representing the undetermined future phase of physical existence, while the real component corresponds to the determined and fixed past.Temporal continuity arises from this internal oscillation, and both the light limit (v=cv=c) and the rest limit (v=0v=0) emerge as degenerate boundaries of the same rotation. This Complex-Time Geometry (CTG) provides a geometric basis that links quantum mechanics, relativity, and thermodynamics under a single structure.The flow of time is interpreted as a continuous projection Im(ψ)→Re(ψ),Im(ψ)→Re(ψ), transforming potentiality into actuality.Within this framework, entropy increase corresponds to the progressive fixation of imaginary freedom, and the arrow of time naturally arises as the geometric direction of realification.Measurement is redefined as a temporal projection from the imaginary to the real domain, resolving the conceptual gap between quantum indeterminacy and classical determinacy. The theory further interprets Schrödinger’s iℏ∂ψ∂t=H^ψiℏ∂t∂ψ=H^ψ as the mathematical manifestation of orthogonal evolution in complex time, where ii ensures reversible continuity.Ultimately, time is not an external parameter but the internal oscillation of existence itself—the mechanism through which the universe continuously writes its own history. Keywords complex-time geometry; temporal projection; quantum measurement; relativity; entropy; arrow of time; ontology of time; self-recording universe
> In standard quantum mechanics, the imaginary part of the wavefunction is treated as a mathematical convenience. This work shows that it corresponds to a real internal coordinate in a strictly real two-component representation Ψ = (R, I). The quantum phase is identified as a rotation angle in this internal plane, and Schrödinger dynamics becomes a continuous rotation between R and I. Crucially, the I-component — though not directly measurable in a single projective measurement — can be fully reconstructed via controlled phase shifts and interferometry against a known reference. This explains why real-only models fail: they lack the second degree of freedom required to produce the sinθ term in interference patterns (P(θ) = A + B cosθ + C sinθ, with C ≠ 0). The model is empirically equivalent to complex quantum mechanics but provides a clear physical interpretation of the “imaginary” part as an internal information coordinate. > This document is self-contained, uses no complex notation, and is fully compatible with established quantum theory. It includes a testable experimental signature and connects to quantum tomography, interferometry, and foundational questions about the role of complex numbers in physics. This work is conceptually related to recent discussions on the necessity of complex numbers in quantum theory (Renou et al. 2021; Chen et al. 2022; Weilenmann et al. 2025), but takes a different approach by giving an explicitly real two-component interpretation of the imaginary part.”