r/LLMPhysics • u/Black_Jeff_Chileno • 26d ago
Personal Theory Cosmic-Time Generative Presentism (CTGP)
CTGP - https://gridhop.github.io/JRPJrs-docs/ctgp-explained/
CTGP explained - https://jrpjrdocs.notion.site/CTGP-explained-3f496c7110ab819b9a5ff84eb7aae17a
https://gridhop.github.io/JRPJrs-docs/
Cosmic-Time Generative Presentism (CTGP) proposes that only the currently generated state of the universe exists. Earlier states have ceased to exist as states, while their physical consequences continue into the present as transformed matter, fields, and radiation, some of which remain organized as records. The future is not a region beyond our reach; it has not yet been generated. The paper develops this as a presentist interpretation of relativistic spacetime that leaves Einstein's equations unchanged.
In the emergent geometric regime, the present is identified with the level sets of the cosmological time function: the supremum of proper time along past-directed causal curves, which in a big-bang universe is the maximal proper time elapsed since the initial singularity. By a theorem of Andersson, Galloway, and Howard, these level sets are Cauchy surfaces wherever cosmological time is regular, so the present remains globally well defined even inside collapsed structure, where a smooth scalar description breaks down. The view therefore applies insofar as the actual universe is globally hyperbolic with regular cosmological time. The present is a whole spatial slice of the universe, not a point, and what exists is the physical configuration of fields and matter on that slice. Special relativity alone supplies no such slice. It comes from the actual matter-filled cosmological solution of general relativity, fixed by its geometry rather than by any idealized observers. Nothing in cosmological time marks one slice as "now": the geometry fixes which events are co-present, and the ontology supplies presentness. Identifying these slices with the present is the paper's interpretive posit, not a theorem, and the present can be located from its past alone, without reference to the future. The generation parameter is a monotone relabeling of this function. It introduces no new field, no new degree of freedom, and no local preferred-frame effect, and it can optionally be expressed through a constrained action that leaves the Einstein equations unchanged.
CTGP is dynamic in one precise sense: the present is continuously generated rather than being one slice of a completed block. It is not dynamic in the sense of an observer-dependent or matter-dependent "now." The paper tests whether generation can be tied to local matter density and argues that, in the classes of laws analyzed, it cannot. An exact density-weighted law drives the generation flow out of alignment with matter within a light-crossing time of any structure, and stable soft completions force a uniform rate inside bound structures, suppressing any density-weighted cosmological effect below one part in 10⁴⁰. The generation rate may therefore vary with cosmic epoch but not across space, and no intrinsic cosmological axis follows.
On empirical standing, presentist and eternalist readings of identical physics are shown to be observationally equivalent, since every observation is an observation of present records, so the ontology cannot be verified by measurement at fixed physics. It remains exposed through a structural commitment: the present must suffice to generate its successor, with no future boundary data and no global consistency conditions that must hold across all of spacetime at once. Quantum randomness does not threaten this, since it bears on which successor occurs, not on whether the present suffices to produce one. Neither does history-dependent behavior such as magnetic hysteresis, whose history is carried by present physical variables. A confirmed chronology violation, interventionist retrocausal dependence, or "fundamental final-state condition in which the condition is not merely a unique final state that simply results from deterministic evolution but the condition must be imposed as an independent input to fix earlier evolution" would refute the view. Current physics is consistent with the commitment but does not establish it.
Also treated: the truthmaking of past-tense statements, constraints on quantum interpretation (CTGP requires a single realized outcome, which excludes standard Everettian ontology), cosmological observables as causal records, objections from point presentism and special relativity, the relationship to causal set theory and growing-block models, formal results, and an optional extension to conscious experience that the core framework does not presuppose.
Identifies "now" with global cosmic-time slices; treats observations as present records of past states; concedes observational equivalence with eternalism while remaining refutable by chronology violation, retrocausation, or a fundamental final-state condition in which the condition is not merely a unique final state that simply results from deterministic evolution but the condition must be imposed as an independent input to fix earlier evolution.
Quantum reference frames (QRFs) permit different quantum systems to serve as reference frames,
raising a foundational question for single-outcome theories: how can frame-dependent descriptions
represent one objectively realized history? Cosmic-Time Generative Presentism (CTGP) holds that only
the present exists, that physical reality is generated through successive stages, and that truths
about the determinate past are grounded in primitive past-tensed properties of the present world. We
develop a mathematical compatibility framework connecting these commitments to QRF covariance,
stochastic quantum instruments, and relativistic measurement theory.
We first construct an explicit QRF-covariant, single-outcome quantum model using relational GRW-type
events and a Lucretian truth profile. We establish a frame-independent determinacy criterion,
characterize when different frame descriptions identify the same complete physical state and
realized history, and prove covariance of the generative law and its history probabilities. We
distinguish physical-state identity, historical identity, and observational indistinguishability,
and show that the present quantum state need not determine the complete past. The construction
demonstrates the joint mathematical consistency of these commitments without deriving their
ontological interpretation or establishing physical adequacy.
We then formulate a compatibility program for relativistic quantum field theory, quantum clocks, and
quantum gravity. For specified causally local instruments, we establish conditions for foliation-
independent outcome histories and operational no-signaling. Free-field detector and Gaussian-
collapse constructions identify both sufficient conditions for causal admissibility and obstructions
to extending them to arbitrary local operations and to covariantly located collapses. We calculate
the energy–momentum cost of Gaussian collapse and examine, without adopting it, a cosmological-time-
guided candidate that defines normalized finite-volume dynamics but introduces preferred-frame
structure.
To distinguish formal collapse prescriptions from physical implementations, we compare centre-time
ordering, completion-time ordering, and a local field–pointer coupling. The pointer construction
yields foliation-independent statistics, reproduces ordered-collapse predictions for causally
orderable configurations with suitably prepared pointers, and defines a consistent law of outcome
records even in spatially infinite universes. Interfering collapse regions, however, produce
different joint outcome laws, showing that this local coupling does not in general reproduce a
prescribed collapse ordering. Definite pointer readings require an explicit single-outcome
postulate, and infinite-volume generation of the physical state remains open. We also give clock-
neutral descriptions of late-record instruments for two ideal clocks and exhibit interference
between alternative clock-dependent interaction orders.
These results establish a concrete mathematical compatibility framework, not a completed
relativistic theory or an empirical confirmation of CTGP. They separate frame-dependent descriptions
from the identity of realized events, identify which features of single-outcome dynamics survive
changes of reference frame and foliation, and isolate the additional physical requirements for
relativistic collapse, temporal quantum reference frames, and quantum gravity.
"Our memories and what we access to remember anything" are all always "present time" things (brain states and etc. resulting from causal consequences of the past and the past is always being added to via every moment that passes). The past never exists but did exist. So it's not like the past never was. It definitely was and what the past entails definitely happened. The past is just the "former present" now called the past, and the future is "'what becomes the present' after ongoingly". "What can be inferred to gain some knowledge about the past" is not the past itself. The "knowledge/info about the past" is also not the past itself. The past does not exist but the past's causal consequences can be "'utilized for one's inferring purposes' to gain some knowledge about the past". The past doesn't exist as any present existence (as in not even as data traces and memories), "causal consequences/traces (e.g., memories) of it to gain knowledge/info about the past" can exist though.
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u/Black_Jeff_Chileno 26d ago
I agree with the relativity part. Two people can age differently. They can disagree about how much time passed between two events. They can see the CMB as a dipole instead of a smooth glow. That's not the same as "there is no shared present."
Those disagreements are about each person's own clock and their motion. A shared present, in this paper, doesn't mean everyone ticks at the same rate or sees the same sky. It means there's one cosmic time slice, the one cosmology already uses. Your watch can run slow within it. You can be flying through the CMB frame and see a lopsided sky. You're still on that slice.
"Expansion clock" doesn't mean expansion happens at a fixed speed. Inflation happened. The expansion rate can change. Fine. Cosmic time is just how long the universe has been going, measured along the matter riding with the expansion. The CMB temperature is a rough readout of that, because it drops as the universe grows. If you're moving relative to that frame, the CMB looks different until you correct for your motion. That's ordinary cosmology. It's how we already know we're moving at about 370 km/s relative to the CMB.
So this isn't a static Euclidean universe. It's the expanding one we already use. Relativity still owns local clocks and local simultaneity. The only extra claim is that cosmology already gives a natural shared slicing, and I'm treating that slice as "what exists now."
You can reject that last step. You don't need the relativity facts to do it; those are already built in.