What is the Temporal Equivalence Principle (TEP)?
TEP is a scalar-tensor framework proposing that time is a dynamical field. More precisely, proper-time accumulation is governed by a scalar field coupled to the matter/clock metric, while local Lorentz invariance and locally measured c are preserved.
How does TEP differ from general relativity?
TEP is proposed as a generalization of GR, not a simple replacement. GR is recovered to current experimental precision where the locally observable shear/source-charge sector is screened or saturated. Differences are expected in global or weakly screened observables: distributed clock correlations, closed-loop synchronization holonomy, and environment-dependent rate or screening transitions.
Is this just gravitational time dilation renamed?
No. GR already predicts gravitational time dilation: clocks tick differently in different gravitational potentials. TEP accepts that and does not claim it as new. The proposed new physics is residual structure after the standard GR timing model is removed: distance-structured clock covariance, environment-dependent Temporal Shear, and possible closed-loop synchronization holonomy.
What evidence motivates TEP?
TEP is first a theoretical framework, but its strongest empirical motivation is the timing-network programme: distance-structured GNSS clock correlations across multi-center products, a 25-year CODE analysis, raw RINEX-derived observables, and an optical-domain SLR consistency test. Pulsars, Cepheids, wide binaries, lensing, and JWST systems are transfer tests of the same Temporal Topology and Temporal Shear framework.
How does TEP reinterpret dark matter observations?
TEP does not deny the lensing, timing, dynamical, or cosmological phenomena usually attributed to dark matter. It challenges the assumption that those phenomena uniquely require a new invisible particulate substance. Temporal-field gradients and nontrivial proper-time transport can project into lensing, timing, and dynamical inference as an apparent mass-like component, termed Phantom Mass.
In the conservative interpretation, this is a testable correction to time-domain and variability-dependent lensing observables. In the stronger interpretation, tested across the series, part of the dark-sector phenomenology may be temporal in origin: an effect of analyzing a universe with nontrivial time transport under the assumption of global isochrony.
How does TEP address the Hubble tension?
TEP predicts that Cepheid periods may acquire an environment-dependent bias in deep gravitational potentials. In the current SH0ES-host analysis, correcting for this proposed bias shifts the inferred local value toward the Planck value. This should be read as a candidate distance-ladder systematic, not as a final resolution until tested blindly on independent Cepheid, TRGB, maser, and SN host samples.
Is TEP compatible with gravitational wave observations?
Yes, in the intended parameter regime. GW170817 tightly constrains differential photon–graviton propagation: any disformal cone tilt must be extremely small. TEP's main conformal-sector effects are different. If electromagnetic and gravitational signals travel along the same path through the same conformal temporal landscape, the effect is common-mode rather than a photon–graviton speed split. Conformal sectors remain indirectly constrained by PPN, equivalence-principle, source-screening, redshift, and clock-comparison tests.
What would test or falsify TEP?
The framework is designed to be tested through several increasingly independent pathways:
- Independent GNSS replication: Reproducing the reported timing correlations using independent processing of public IGS/CODE clock products.
- Raw-data robustness: Testing whether the timing signal persists when derived directly from raw RINEX observations using multiple GNSS processing engines (e.g., GIPSY, Bernese).
- Technology independence: Verifying if similar spatial-temporal structure is detectable via Satellite Laser Ranging (SLR), fiber-optic time transfer, or optical-clock networks.
- Closed-loop holonomy: Performing dedicated multi-leg timing experiments to search for residual synchronization holonomy after standard GR effects are removed.
- Screening morphology: Testing whether the predicted environment-dependent ordering persists in wide-binary, globular cluster, and galaxy-scale data.
- Astrophysical inheritance: Determining if the framework fails when timing-calibrated parameters are applied to lensing and cosmological observables without additional free parameters.
Does TEP claim GNSS is wrong?
No. GNSS works extraordinarily well. TEP does not claim navigation is failing. It asks whether residual clock-network covariance, after standard modeling and differencing, contains spatial structure normally treated as noise, covariance, or processing residual. The claim is about subdominant correlation structure, not operational GNSS accuracy.
How does TEP relate to MOND?
Both TEP and MOND address phenomenology attributed to dark matter, but through distinct mechanisms. MOND proposes a universal acceleration threshold (a₀ ≈ 1.2×10⁻¹⁰ m/s²) below which gravitational behavior deviates from Newtonian predictions. TEP instead tests environment-dependent Temporal Shear recovery organized around the Temporal Topology saturation scale ρT ≈ 20 g/cm3, which produces environmental ordering that differs from the MOND/EFE parameterizations tested in the wide-binary analysis. The two frameworks make qualitatively different predictions for environmental stratification.
Where can I find the TEP papers, data, and analysis code?
The full manuscript series is freely available at mlsmawfield.com with Zenodo DOIs. Analysis code and data pipelines are hosted on GitHub. All manuscripts, code, and data products are released under Creative Commons CC-BY-4.0 and MIT licenses.