From classical point of view the full description of a system is the sum of its parties descriptions. Quantum mechanics introduced essential correction in the classical view: the measurable properties of a particle ensemble can exceed the properties sum of its particles. It is impossible to describe such entangled states by the known local field equation. Now nonlocal quantum correlations are well known, they underlie quantum information science and have the practical applications already. On the other hand in macro-physics, in particular, in astrophysics and geophysics a lot of facts about distant dissipative processes correlations (including violating classical causality) not reducible to electromagnetic and gravitation interactions have been collected. These correlations could be explained by their nonlocal nature. Although thermo- dynamic limit now is already a subject of entanglement research, the mentioned large-scale processes have remained out of scope of quantum information. The book “Causality and Reversibility in Irreversible Time” by S. M. Korotaev is the first attempt to fill this gap.
From classical point of view the full description of a system is the sum of its parties descriptions. Quantum mechanics introduced essential correction in the classical view: the measurable properties of a particle ensemble can exceed the properties sum of its particles. It is impossible to describe such entangled states by the known local field equation. Now nonlocal quantum correlations are well known, they underlie quantum information science and have the practical applications already. On the other hand in macro-physics, in particular, in astrophysics and geophysics a lot of facts about distant dissipative processes correlations (including violating classical causality) not reducible to electromagnetic and gravitation interactions have been collected. These correlations could be explained by their nonlocal nature. Although thermo- dynamic limit now is already a subject of entanglement research, the mentioned large-scale processes have remained out of scope of quantum information. The book “Causality and Reversibility in Irreversible Time” by S. M. Korotaev is the first attempt to fill this gap.
In the book the idea of irreversibility as an inherent property of time is developed theoretically and experimentally. The matter is related with causality, and the method of causal analysis is presented. The quantum causal analysis helps understand the principle of week causality which admits extraction of information from the future without the classical paradoxes. It implies a possibility of observation of the future as the existing reality. So, the acceptance of time irreversibility leads to a striking manifestation of reversibility – signaling in reverse time. Quantum insight allows considering correlations of the distant irreversible processes as nonlocal ones originated from a macroscopic entanglement. The experimental approach to study of macroscopic nonlocality is discussed, and design of the experimental setup is described. The results of experiments on macroscopic nonlocal correlations, the signals in reverse time and their application to the forecast of large-scale random processes are expounded.
Quantum theory shows that natural laws cannot be understood as ruling single events since the latter occur randomly. Nevertheless, the physical world shows everywhere order whose source cannot be represented by the latter. It is shown that this order is due to the presence of quantum correlations. Since their e↵ect is to reduce the space of the possible events, they can be considered as causal factors. However, being correlations, they do not display the dynamic character that would be required in order to produce a determinate e↵ect. This is why they need additional local factors in order to concur to the production of a certain event. If not so, this would even imply a violation of Einstein’s locality since correlations could be used by themselves to transmit superluminal signals. Due to such a character of correlation, they can be understood as kind of potential reality needing actual (and local) context to be e↵ective. This allows also a distinction that is classically unknown between locality and globality. Such a distinction solves the important problem of measurement showing that ultimately we have irreversible local processes while globally everything is still reversible. In particular, it is a shift of information that can explain this local phenomenon. In fact, quantum systems are essentially information and also the measurement process is ultimately a dealing with information: information processing (preparing a system), information sharing (coupling a system with an apparatus) and information selection (detecting). State, observable and property appear as equivalence classes of these three procedures, respectively. Finally, the distinction between interpreted and uninterpreted ontology is considered in a Kantian perspective, but it is also shown that the approach supported here is rather a critical realism.
In view of the fact that physical measurements represent transmission of information, a general definition based on the measure of lack of knowledge in information theory can be introduced for different entropies each of them corresponding to one particular kind of measurement. By means of this entropy concept the problem of the consistency of microscopic reversibility and maeroscopic irreversibility is studied. Under certain conditions it can be shown that the reversible microscopic equation of motion leads to the result that all entropies corresponding to reduced quantities, i.e., to quantities which do not determine the microscopic state of the system completely, can never decrease. However, it is to be noted that this behavior is symmetric in time, in the classical as well as in the quantum mechanical case. Irreversibility is so related on the one hand to incomplete description of a system, but on the other also to the fact that theoretical statements can be verified by experiments in the future only. The validity of the results obtained within the framework of ensemble theory for a single physical system is dtscussed. As applications of the general ideas a system of free particles and the Boltzmann gas are treated. (auth)
The emergence of irreversibility in physical processes, despite the fundamentally reversible nature of quantum mechanics, remains an open question in physics. This thesis explores the intricate relationship between quantum mechanics and thermodynamics, with a particular focus on minimizing entropy production in finite-time processes. By employing tools from quantum information theory and geometric thermodynamics, we tackle the challenge of deriving irreversible thermodynamic behavior from the reversible microscopic framework of quantum mechanics. We begin with a comprehensive review of the laws of thermodynamics, setting the stage for the subsequent analyses. We introduce novel developments in quantum thermodynamics through a generalized framework for geometric thermodynamics, which enables the derivation of finite-time corrections beyond the Markovian regime. Building on this foundation, we extend Landauer's principle by incorporating a finite-time correction that highlights the necessity of strong coupling for optimal information erasure processes. This result underscores the emergence of Planckian time as a fundamental speed limit to thermalization. Additionally, we explore how collective effects can be harnessed to reduce energy dissipation in thermodynamic operations, revealing that classical correlations between systems can significantly mitigate dissipation, though this may pose new questions regarding the third law of thermodynamics. Finally, we optimize thermodynamic processes in mesoscopic systems, including quantum dot engines and information engines. These findings not only enhance our understanding of the fundamental limits of irreversibility but also open new avenues for research. Future works will focus on fully exploiting collective effects, aligning these with the third law of thermodynamics, and understanding the thermodynamic consistency of master equations.
Quantum entanglement appears nonlocal: measuring one particle instantaneously determines outcomes for its distant partner, seemingly defying relativistic causality. Building on prior work, we propose that this "paradox" dissolves when particles are recognized not as point-objects but as spatial termini of single, extended correlation sequences. These sequences remain genuinely incomplete – indeterminate in any measurement basis – until measurement supplies the boundary conditions that complete the entire pattern. No information propagates between termini because they were never separate entities. Measurement doesn't reveal hidden properties; it finishes an incomplete structure through the enforcement of local invariants via irreversible interaction with macroscopic systems. This framework explains why superposition exists, why certain observables become classical (position, momentum, and energy), and why quantum behavior dominates at small scales while classical behavior emerges at large scales. The approach eliminates longstanding paradoxes without exotic ontology: no hidden variables, no parallel worlds, no consciousness-dependent collapse, no violation of relativity. We derive testable predictions and resolve the measurement problem: there is no discontinuous collapse, only thermodynamically irreversible completion of correlation sequences. Most provocatively, this analysis reinforces a claim from prior work: if laws are emergent attractors rather than eternal axioms, the search for a "theory of everything" unifying quantum mechanics and general relativity may rest on a category error.
Recent works in foundations of quantum (field) theory and relativistic quantum information try to better grasp the interplay between the structure of quantum correlations and the constraints imposed by causality on physical operations. Chapter 1 is dedicated to the study of the conceptual implications of quantum nonlocality, a concept that subsumes that of entanglement in a certain way. We detail the recent information-theoretic approaches to understanding the structure of nonlocal correlations, and the issues the latter raise concerning the ability of local observers to isolate a system from its environment. Chapter 2 reviews in what sense imposing Poincare invariance affects entanglement detection and quantification procedures. This invariance ultimately forces a description of all quantum systems within the framework of quantum field theory, which leads to the impossibility of localized finite-energy states and to the divergence of all entanglement measures for local observers. We provide a solution to these two problems by showing that there exists a generic equivalence between a finite spatial resolution of the measurement apparatus and the exclusion of high-energy degrees of freedom from the definition of the observed system. This equivalence allows for an epistemic interpretation of the standard quantum formalism describing nonrelativistic localized systems and their correlations, hence a clarification of the origin of the finite measures of entanglement between such systems. Chapter 3 presents a recent theoretical framework that predicts the existence of correlations with indefinite causal order. In analogy to the information-theoretic approaches to nonlocal correlations, we introduce some principles that constrain the structure of such correlations, which is a first step toward a clear understanding of their physical origin.