A novel theoretical reformulation of the conventional three-step photoemission model is presented by integrating the conceptual frameworks of constructor theory and quantum information theory. Each step of the photoemission process photon absorption, electron transport, and electron emission is formalized as a physical task (in the constructor-theoretic sense) and modeled by a quantum channel with an explicit operator-level description. This dual framework not only recovers the standard efficiency factorization n = A T D but also reveals new insights into the preservation of coherence and the interdependence of successive tasks. Furthermore, potential experimental setups and conditions under which the predicted phenomena could be observed are discussed. The motivation of this work is to pave the path for improved implementations of the current photoemission model and to contribute toward the realization of a universal constructor for quantum computation.
A novel theoretical reformulation of the conventional three-step photoemission model is presented by integrating the conceptual frameworks of constructor theory and quantum information theory. Each step of the photoemission process photon absorption, electron transport, and electron emission is formalized as a physical task (in the constructor-theoretic sense) and modeled by a quantum channel with an explicit operator-level description. This dual framework not only recovers the standard efficiency factorization n = A T D but also reveals new insights into the preservation of coherence and the interdependence of successive tasks. Furthermore, potential experimental setups and conditions under which the predicted phenomena could be observed are discussed. The motivation of this work is to pave the path for improved implementations of the current photoemission model and to contribute toward the realization of a universal constructor for quantum computation.
Constructor theory is a proposal to extend quantum information theory beyond both quantum theory and computation, to cover more general machines than programmable computers -- called constructors. It consists of newly conjectured physical principles that can be expressed as constraints on what tasks are possible, what are impossible, and why. These principles also determine the repertoire of the universal constructor, which is a programmable machine that can perform all physically possible tasks. The principles of constructor theory have novel physical content that supplements current dynamical laws, leading to new predictions for experimental tests. In this paper, we review the main experimental proposals to test the principles of constructor theory and discuss their implications for existing theories of physics and for their successors.
In this paper and a companion paper, we attempt to systematically investigate the possibility that the concept of information may enable a derivation of the quantum formalism from a set of physically comprehensible postulates. To do so, we formulate an abstract experimental set-up and a set of assumptions based on generalizations of experimental facts that can be reasonably taken to be representative of quantum phenomena, and on theoretical ideas and principles, and show that it is possible to deduce the quantum formalism. In particular, we show that it is possible to derive the abstract quantum formalism for finite-dimensional quantum systems and the formal relations, such as the canonical commutation relationships and Dirac's Poisson Bracket rule, that are needed to apply the abstract formalism to particular systems of interest. The concept of information, via an information-theoretic invariance principle, plays a key role in the derivation, and gives rise to some of the central structural features of the quantum formalism.
This work presents a unified TrinityLabo framework for room-temperature quantum computational windows by integrating four layers that are usually treated separately: foundational ontology, stabilization theory, hardware-control architecture, and verification methodology. Rather than taking the present local quantum state as primitive, the paper begins from a history-first formalism in which admissible histories, realization maps, and compression-derived local structure form the core descriptive layer. Within this framework, local states and local effective laws are interpreted not as ultimate primitives, but as realized compressions of deeper history-sensitive structure. On this basis, the paper introduces a room-temperature stabilization theory centered on three main quantities: the history stabilization gain, the effective room-temperature error, and the physical computational capacity. These quantities are used to define a room-temperature quantum computational window as a task-relevant regime in which structured historical stabilization suppresses the net effective burden strongly enough for nontrivial quantum survivability. A key original concept in the paper is history-consistent recovery, a recovery primitive that acts not only on the current realized state but also on historically relevant supervisory context, thereby extending the framework beyond purely memoryless correction schemes. The work then maps these theoretical ideas into a hybrid photonic-electronic architecture consisting of encoded quantum resources, a photonic forward-computation fabric, an electronic supervisory plane, layered decoding, and history-aware recovery. It further develops a verification doctrine based on matched-branch comparison, benchmark ratios, task survivability measures, history-contraction diagnostics, and explicit falsification criteria. In this sense, the paper is not only a conceptual proposal but also a structured research program specifying how the framework should be numerically tested, comparatively evaluated, and potentially contradicted. This work does not claim that universal room-temperature quantum computing has already been realized. Instead, it provides a formal TrinityLabo research framework in which room-temperature quantum viability is reformulated as a problem of realized history stability, effective error suppression, recovery-aware architecture, and benchmarked computational survivability. The main contribution is therefore not a product announcement, but a unified theoretical and methodological foundation for investigating whether nontrivial room-temperature quantum computational windows can exist in physically meaningful architectures.
Photodetection plays a key role in basic science and technology, with exquisite performance having been achieved down to the single-photon level. Further improvements in photodetectors would open new possibilities across a broad range of scientific disciplines and enable new types of applications. However, it is still unclear what is possible in terms of ultimate performance and what properties are needed for a photodetector to achieve such performance. Here, we present a general modeling framework for photodetectors whereby the photon field, the absorption process, and the amplification process are all treated as one coupled quantum system. The formalism naturally handles field states with single or multiple photons as well as a variety of detector configurations and includes a mathematical definition of ideal photodetector performance. The framework reveals how specific photodetector architectures introduce limitations and tradeoffs for various performance metrics, providing guidance for optimization and design.
Description This publication is part of the RT Foundations series and primarily presents the current conceptual interpretation of quantum realization within Rachel Theory (RT), formally consisting of the Dual Network Theory together with the Law of Compromise and the Law of Periodicity. While its primary focus is quantum realization, the paper also briefly discusses several related theoretical concepts where they contribute to the proposed framework. The purpose of this paper is to define the current conceptual framework through which RT interprets quantum realization and to clarify the proposed roles of the Fixed Network, the Dynamic Network, Phase Potential Cells, the Law of Compromise, and the Law of Periodicity within this context. It is a conceptual foundation paper that outlines the proposed mechanisms, distinguishes them from conventional interpretations, and identifies directions for future mathematical, computational, and experimental investigation. The publication also invites limited scientific collaboration aimed at the continued theoretical development, computational investigation, and future experimental evaluation of the proposed framework. Readers are encouraged to interpret this publication within its stated scope and as one component of the broader RT Foundations research program.