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arxiv: 2606.00255 · v1 · pith:6PNF7BH2new · submitted 2026-05-29 · 🪐 quant-ph · gr-qc· physics.hist-ph

Topics on Foundations of Physics: From the quantum to the (semi) classical, gravity, thermodynamics, and (or beyond) our possible detections

Ricardo Muci\~no (Universidad Nacional Aut\'onoma de M\'exico) This is my paper

Pith reviewed 2026-06-28 21:59 UTC · model grok-4.3

classification 🪐 quant-ph gr-qcphysics.hist-ph
keywords quantum foundationsthermodynamic equilibriumsemiclassical gravityrelativistic collapsetime asymmetryquantum detections
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The pith

Motivations around time asymmetry produce three interconnected lines of research on quantum detections, thermodynamic equilibrium, and semiclassical gravity.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The thesis assesses and extends quantum theories to test their implications in thermodynamics, semiclassical gravity, and detectable predictions. It originates in the desire to connect the fundamental quantum description with observed time flow and asymmetric natural processes. The work organizes into three parts that the author presents as distinct yet linked and successful: possible detections, explanations of equilibrium approach, and relativistic collapse models paired with a self-consistent semiclassical gravity framework. A reader would care because these lines address how quantum mechanics might scale to classical regimes while preserving or explaining the perceived direction of time.

Core claim

The search for a better understanding of time according to physical theories and the gap between quantum foundations and perceived reality led to three distinct yet interconnected lines of research: I. On Possible Detections within Physical Theories; II. On Explaining the Approach to Thermodynamic Equilibrium; and III. Relativistic Collapse Theories and a Self-Consistent Model of Semiclassical Gravity.

What carries the argument

Three interconnected research lines that extend quantum theories to explore testable implications across thermodynamics, gravity, and detections.

If this is right

  • Physical theories can be extended to identify in-principle detectable predictions.
  • The approach to thermodynamic equilibrium receives an explanation from the extended frameworks.
  • Relativistic collapse theories support a self-consistent semiclassical gravity model.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The lines may connect time asymmetry directly to gravitational degrees of freedom.
  • Detection schemes from part I could be adapted to test collapse models in part III.
  • Equilibrium explanations in part II might generalize to nonequilibrium quantum processes near black holes.

Load-bearing premise

The three lines of research successfully extend quantum theories to produce explanatory or testable implications for thermodynamics, gravity, and detections.

What would settle it

A demonstration that the models developed in any of the three parts fail to generate new detectable predictions or fail to derive a consistent explanation for the approach to thermodynamic equilibrium.

Figures

Figures reproduced from arXiv: 2606.00255 by Ricardo Muci\~no (Universidad Nacional Aut\'onoma de M\'exico).

Figure 6.1
Figure 6.1. Figure 6.1: Spacetime diagram of the EPR setting with two foliations: in yellow th one with hypersurfaces Σt and in blue the one with hypersurfaces Σt ′ . A and B represent the events associated with Alice and Bob’s measurements in the z−spin basis respectively. P is an event in Alice’s worldline, before she makes her measurement, and R is an event in Bob’s worldline, after he makes his measurement. Consider, on one… view at source ↗
Figure 8.1
Figure 8.1. Figure 8.1: Different foliations sharing the same hypersurface Σtf . Independently of which foliation is used to arrive to the state in Σtf , e.g. the one that contains Σt ′ with the associated state ρ ′ , or Σt ′′ with ρ ′′, the theory should assign the same ρ(Σtf ) to Σtf . And any differences between the states ρ ′ and ρ0 are due to what happens in Γ. More concretely, we will assume that our relativistic quantum … view at source ↗
Figure 8.2
Figure 8.2. Figure 8.2: Matter density of two pointers in the superposition (8.17) showing just the x spatial dimension of Σ0. positions of the pointers are measured by placing detectors in the future of their worldlines. The effect of the dynamical collapse will suppress the superposition, concentrating the mass to a single localized state (|L1⟩ |L2⟩ or |R1⟩ |R2⟩) after detections. And what the theory tells us about what actua… view at source ↗
Figure 8.3
Figure 8.3. Figure 8.3: Spacetime diagram showing the hypersurfaces Σ0, Σt, Σt ′ and Σt ′′ . The mass density is shown in red with transparency for m/2 and full color for m after detection, e.g. to the right, R1 and R2. Consider also the other two following hypersurfaces of different foliations depicted in [PITH_FULL_IMAGE:figures/full_fig_p102_8_3.png] view at source ↗
Figure 9.1
Figure 9.1. Figure 9.1: An spherically symmetric superposition of masses suffers a collapse at r = 0 and t = 0, localizing the entire mass M at the region of the shell. The central massive core has radius RC and uniform density ρC , and the shell has an inner radius RI , an outer radius RE and uniform density ρS. Now, the occurrence of the collapse at r = 0 and t = 0 produces a localization of all the mass on the shell. Note th… view at source ↗
read the original abstract

The work leading to this thesis focuses on assessing and extending quantum theories in order to explore and test their implications across various regimes -- including thermodynamics, semiclassical and quantum gravity scenarios, and the in principle detectable predictions of such theories. The general motivation stems from a basic desire to understand the world form its very foundations. For instance, how can we bridge the gap between what we observe or `perceive' and the fundamental quantum nature in our theories. In particular, this work originated from the search to a better understanding of the nature of time according to our physical theories and the common perception that it invariably `flows' to the future, or, in other words, why do we observe distinct natural processes evolving asymmetrically in time? These motivations led to three distinct, yet interconnected and successful, lines of research, presented here in three separate parts: I. On Possible Detections within Physical Theories; II. On Explaining the Approach to Thermodynamic Equilibrium; and III. Relativistic Collapse Theories and a Self-Consistent Model of Semiclassical Gravity.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

1 major / 0 minor

Summary. The manuscript is a thesis abstract stating that motivations to understand the nature of time and observed time asymmetry in natural processes led to three distinct yet interconnected and successful lines of research: I. On Possible Detections within Physical Theories; II. On Explaining the Approach to Thermodynamic Equilibrium; and III. Relativistic Collapse Theories and a Self-Consistent Model of Semiclassical Gravity. These lines are presented as assessing and extending quantum theories to explore implications for thermodynamics, semiclassical/quantum gravity, and in-principle detectable predictions.

Significance. If the three lines of research are substantiated with concrete methods and outcomes, the work could contribute to foundational questions in quantum mechanics by addressing time asymmetry, equilibrium explanations, and semiclassical gravity models. The claimed interconnections between detections, thermodynamics, and gravity extensions represent a potential strength for unifying disparate regimes, though the abstract provides no evidence or results to evaluate this.

major comments (1)
  1. Abstract: The central claim that the described motivations 'led to three distinct, yet interconnected and successful, lines of research' is presented as a factual outcome without any supporting derivations, specific results, methods, data, or references to the content of the three parts, which is load-bearing for the thesis assertion.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for their review and for highlighting the need for greater substantiation in the abstract. We address the single major comment below.

read point-by-point responses

  1. Referee: Abstract: The central claim that the described motivations 'led to three distinct, yet interconnected and successful, lines of research' is presented as a factual outcome without any supporting derivations, specific results, methods, data, or references to the content of the three parts, which is load-bearing for the thesis assertion.

    Authors: The abstract is intended as a high-level summary of a thesis whose three parts contain the concrete methods, derivations, and results (Part I on detection proposals, Part II on thermodynamic derivations, and Part III on the relativistic collapse model and semiclassical gravity). The interconnections and success claims are substantiated within those parts rather than in the abstract itself. We nevertheless agree that the abstract would be improved by the addition of brief, specific references to key outcomes from each part. We will revise the abstract accordingly. revision: yes

Circularity Check

0 steps flagged

No significant circularity; thesis is a descriptive summary of research lines with no exhibited derivations

full rationale

The abstract states that motivations led to three research lines but presents no equations, predictions, fitted parameters, or deductive steps. The central claim is a factual description of the thesis structure and outcomes rather than a derivation chain that could reduce to its own inputs by construction, self-citation, or renaming. No load-bearing technical steps are visible that match the enumerated circularity patterns. This is the expected outcome for a high-level thesis overview without internal mathematical derivations.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

Only abstract available; no free parameters, axioms, or invented entities are specified or extractable.

pith-pipeline@v0.9.1-grok · 5737 in / 1022 out tokens · 23541 ms · 2026-06-28T21:59:13.519789+00:00 · methodology

discussion (0)

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Reference graph

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