Philosophy of Physics, Misc

Modern physics asks: how do the objects exist? This kind of question inevitably touches upon philosophy; to be precise, it involves metaphysics that traditionally deals with these problems. There are grounds to assume that a quantum object in a certain sense does not exist until it is registered. Thus, one of the conclusions says, “Photon is a photon if it is a registered photon”. This is a paraphrase of well-known Wheeler’s words about the essence of quantum phenomenon. These effects cannot (...) be understood if we come from the assumption that all existing (‘real’) and quantum objects in particular, is only being of the actual. To explain quantum mechanics phenomena we need to realize that there exists another modus of being. Quantum mechanics refers to some sort oftranscendence. Such conclusion is based not only on the analysis of the testing of Aspeckt’s experiments. The whole structure of quantum mechanics confirms it. The revision of the New European paradigm leads to the return of such conception of existence that brings us to the traditional metaphysical understanding of the being and implies its study on several levels of existence. The conclusion of this kind leads to a serious correction of the philosophical model of the world built by modern natural science. (shrink)

Science uses its firmest conclusions to arrive at new ones which may well completely destroy these, previously firmest, conclusions. The perceptive may notice that when the previously firmest conclusions are demolished we may remain in the dark with no conclusion worth replacing it with. But only when we replace it with a firmer conclusion can we speak of a bootstrap operation rather than of a refutations. Often, to conclude, the ad hoc nature of a fact-like statement is rooted in the (...) theoretical background against which it is couched; given a different theoretical background and it fully falls into place, as the expression goes. If an observation report is at once a corollary of our scientific theory, then it is unproblematic. If it conflicts with our scientific theory, either we reject the theory or try to find an excuse for not rejecting it. When, however, a small theory which well integrates in our theoretical background is attacked by a well corroborated fact-like theory and all its defences are refuted, then a revolution may be under way. Such events may be rare, but they are the more interesting ones. At times we alter our whole theoretical outlook around a rather fact-like theory which then gets refuted. We then look silly from any viewpoint except that which takes the process to be a bootstrap operation! (shrink)

Book Review of: "Everywhere and Everywhen: Adventures in Physics and Philosophy" by Nick Huggett.

We argue the thesis that if (1) a physical process is mathematically representable by a Cauchy sequence; and (2) we accept that there can be no infinite processes, i.e., nothing corresponding to infinite sequences, in natural phenomena; then (a) in the absence of an extraneous, evidence-based, proof of `closure' which determines the behaviour of the physical process in the limit as corresponding to a `Cauchy' limit; (b) the physical process must tend to a discontinuity (singularity) which has not been reflected (...) in the Cauchy sequence that seeks to describe the behaviour of the physical process. We support our thesis by mathematical models of the putative behaviours of (i) a virus cluster; (ii) an elastic string; and (iii) a Universe that recycles from Big Bang to Ultimate Implosion, in which parity and local time reversal violation, and the existence of `dark energy' in a multiverse, need not violate Einstein's equations and quantum theory. We suggest that the barriers to modelling such processes in a mathematical language that seeks unambiguous communication are illusory; they merely reflect an attempt to ask of the language chosen for such representation more than it is designed to deliver. (shrink)

The common cause principle states that common causes produce correlations amongst their effects, but that common effects do not produce correlations amongst their causes. I claim that this principle, as explicated in terms of probabilistic relations, is false in classical statistical mechanics. Indeterminism in the form of stationary Markov processes rather than quantum mechanics is found to be a possible saviour of the principle. In addition I argue that if causation is to be explicated in terms of probabilities, then it (...) should be done in terms of probabilistic relations which are invariant under changes of initial distributions. Such relations can also give rise to an asymmetric cause-effect relationship which always runs forwards in time. (shrink)

This paper shows that several live philosophical and scientific hypotheses – including the holographic principle and multiverse theory in quantum physics, and eternalism and mind-body dualism in philosophy – jointly imply an audacious new theory of free will. This new theory, "Libertarian Compatibilism", holds that the physical world is an eternally existing array of two-dimensional information – a vast number of possible pasts, presents, and futures – and the mind a nonphysical entity or set of properties that "read" that physical (...) information off to subjective conscious awareness (in much the same way that a song written on an ordinary compact-disc is only played when read by an outside medium, i.e. a CD-player). According to this theory, every possible physical “timeline” in the multiverse may be fully physically deterministic or physically-causally closed but each person’s consciousness still entirely free to choose, ex nihilo, outside of the physical order, which physically-closed timeline is experienced by conscious observers. Although Libertarian Compatibilism is admittedly fantastic, I show that it not only follows from several live scientific and philosophical hypotheses, I also show that it (A) is a far more explanatorily powerful model of quantum mechanics than more traditional interpretations (e.g. the Copenhagen, Everett, and Bohmian interpretations), (B) makes determinate, testable empirical predictions in quantum theory, and finally, (C) predicts and explains the very existence of a number of philosophical debates and positions in the philosophy of mind, time, personal identity, and free will. First, I show that whereas traditional interpretations of quantum mechanics are all philosophically problematic and roughly as ontologically “extravagant” as Libertarian Compatibilism – in that they all posit “unseen” processes – Libertarian Compatibilism is nearly identical in structure to the only working simulation that human beings have ever constructed capable of reproducing (and so explaining) every general feature of quantum mechanics we perceive: namely, massive-multiplayer-online-roleplaying videogames (or MMORPGs). Although I am not the first to suggest that our world is akin to a computer simulation, I show that existing MMORPGs (online simulations we have already created) actually reproduce every general feature of quantum mechanics within their simulated-world reference-frames. Second, I show that existing MMORPGs also replicate (and so explain) many philosophical problems we face in the philosophy of mind, time, personal identity, and free will – all while conforming to the Libertarian Compatibilist model of reality. -/- I conclude, as such, that as fantastic and metaphysically extravagant as Libertarian Compatibilism may initially seem, it may well be true. It explains a number of features of our reality that no other physical or metaphysical theory does. (shrink)

A Zenonian supertask involving an infinite number of colliding balls is considered, under the restriction that the total mass of all the balls is finite. Classical mechanics leads to the conclusion that momentum, but not necessarily energy, must be conserved. Relativistic mechanics, on the other hand, implies that energy and momentum conservation are always violated. Quantum mechanics, however, seems to rule out the Zeno configuration as an inconsistent system.

Concerning the use of history and philosophy in science teaching, the topic of thermal phenomena and thermodynamics is fertile because it relates to various epistemological and philosophical themes, which can be accessible and useful for secondary education, and its history shows interesting debates among scientists and strong relationships between science, technology and socio-economic problems. Moreover, many students’ conceptions are similar to ideas and reasoning of ancient theories, and residues of these theories are still present in current scientific language and in (...) textbooks. The debate about the meaning and implications of the second law of thermodynamics involved broad scientific and philosophical problems. Entropy was connected with the theory of information, and thermodynamic ideas were assumed in other fields, such as economy, ecology and sociology. After a general introduction on the role of history and philosophy in science teaching, the chapter presents the main results of research on students’ conceptions and difficulties about thermal phenomena, a review of research concerning the use of history and philosophy in teaching thermodynamics and a discussion of historical and philosophical themes having valuable conceptual and cognitive implications that can be appropriate for teaching. Philosophical themes of didactic interest are discussed together with their teaching and learning implications. These themes include the meaning, interpretations and implications of the second law (irreversibility, time arrow, statistical and probabilistic laws and determinism); the relationships between macroscopic properties and microscopic structures; the nature of thermodynamics, its characteristics, language and explanations and its relationships and differences with mechanics; and the relationships between science, technology and general cultural context in the case of thermodynamics. Some case histories useful for teaching are presented, including the theories on the nature of heat; the discovery of thermal radiation, the debate on its nature and the search for its law; the calorific and frigorific rays in thermal radiation; the discovery of the second law; the history of steam engines; the Carnot cycle and its connections with caloric theory and entropy; the history of the cooling law and the definition of a good temperature scale; and the construction of the physical quantity temperature. (shrink)

There has been a long-standing debate about the relationshipof predictability and determinism. Some have maintained that determinism impliespredictability while others have maintained that predictability implies determinism. Manyhave maintained that there are no implication relations between determinism andpredictability. This summary is, of course, somewhat oversimplified and quick at least in thesense that there are various notions of determinism and predictability at work in thephilosophical literature. In this essay I will focus on what I take to be the Laplacean visionfor determinism and (...) predictability. While many forms of predictability areinconsistent with this vision, I argue that a suitably restricted notion of predictability,consistent with the practice of physicists, is implied by the Laplacean notion of determinism.It is argued that limitations on predictability are of an in principle nature in the Appendix. (shrink)

Physics could be defined, inter alia, as a systematic attempt at pushing actuality aside and bringing form to the fore. On the other hand, the formal descriptions which are the theoretical end-products of physics have to connect somewhere with actuality. Having to connect with actuality but holding no appropriate counterpart of actuality in it: such is the particularity of physics. As a consequence, many well-known enigma appear as paradoxes OF physics rather than just difficulties IN physics.

Howson famously argues that the no-miracles argument, stating that the success of science indicates the approximate truth of scientific theories, is a base rate fallacy: it neglects the possibility of an overall low rate of true scientific theories. Recently a number of authors has suggested that the corresponding probabilistic reconstruction is unjust, as it concerns only the success of one isolated theory. Dawid and Hartmann, in particular, suggest to use the frequency of success in some field of research R to (...) infer a probability of truth for a new theory from R. I here shed doubts on the justification of this and similar moves and suggest a way to directly bound the probability of truth. As I will demonstrate, my bound can become incompatible with the assumption specific testing and Dawid and Hartmann’s estimate for success. (shrink)

Modern physics describes the mechanics of the Universe. We have discovered a new foundation for physics, which explains the components of the Universe with precision and depth. We quantify the existence of Aether, subatomic particles, and the force laws. Some aspects of the theory derive from the Standard Model, but much is unique. A key discovery from this new foundation is a mathematically correct Unified Force Theory. Other fundamental discoveries follow, including the origin of the fine structure constant and subatomic (...) particle g-factors, a slight correction of neutron magnetic moment, a geometrical structure for charge, the quantification of electromagnetic charge as separate from electrostatic charge, a more precise meaning of spin, the quantification of space-resonance in five dimensions, and a new system of quantum units. The Aether quantifies as a fabric of quantum rotating magnetic fields with electromagnetic, electrostatic, and gravitational dipole structures. Subatomic particles quantify as angular momentum encapsulated in a quantum, rotating magnetic field. All quantum, atomic, and molecular processes can be precisely modeled, leading to discrete physics with new understandings and insights. (shrink)

An attempt to clarify how the problem of absolute time and the problem of absolute motion relate to one another, especially with respect to causal attributions involving time and motion.

The pendulum clock was one of the most important metaphors for early modern philosophers. Christiaan Huygens (1629-1695) discovered his pendulum clock in 1656 based on the principle of isochronism discovered by Galileo (1564-1642). This paper aims at exploring the broad historical context of this invention, showing the role of some key figures such as Andreas Colvius (1594-1671), Elia Diodati (1576-1661), Hugo Grotius (1583-1645) and Constantijn Huygens, the father of Christiaan Huygens. Secondly, it suggests - based on this context - that (...) it is hard to believe that Huygens did not know about Galileo’s idea to construct a pendulum regulated clock. Finally, this article illustrates how the Dutch philosopher Spinoza (1632-1677) might have been inspired by Huygens’ discovery of the synchronization of the pendulum clocks in his views on the agreement between bodies in the universe. -/- Resumo: O relógio de pêndulo foi uma das metáforas mais importantes para os filósofos modernos. Christiaan Huygens (1629-1695) inventou o relógio de pêndulo em 1656 baseado no princípio do isocronismo descoberto por Galileo (1564-1642). Este artigo busca explorar o amplo contexto histórico dessa invenção, demonstrando o papel de algumas figuras-chave como Andreas Colvius (1594-1671), Elia Diodati (1576-1661), Hugo Grotius (1583-1645) e Constantijn Huygens, o pai de Christiaan Huygens. Em segundo lugar, sugere-se - baseado nesse contexto - que é difícil acreditar que Huygens não sabia da ideia de Galileo de construir um relógio regulado por um pêndulo. Por fim, este artigo ilustra como o filósofo holandês Espinosa (1632-1677) pode ter se inspirado nessa invenção de Huygens da sincronização do relógio de pêndulo em suas visões sobre o acordo entre os corpos no universo. -/- Palavras-chave: Galileo; Relógio de pêndulo; Huygens; República holandesa; Espinosa. -/- . (shrink)

The notion of space is one of the most discussed within classical physics concepts. The works of Copernicus and Galileo, as well as Gassendi´s ideas led to Newton to regard it as substance. This conception of space, allows the notion of symmetry is present in an indirect or implied, within the laws of physics, formed through the notions of equivalence and balance. The aim of this study is to identify the symmetry, through such notions, under the study of indistinction between (...) the repose state and the state of uniform translational movement known as the law of inertia. The philosophical approach is framed in the link between these notions and the problem of indistinguishability between states of different movement. We will discuss first the conception of space Telesio and Gassendi that led Newton to his absolutist conception of space. The conception of space and its relationship with Newton symmetry is the second part of our work. As a third part present linking of the Newtonian space with notions of balance, symmetry and equivalence. Subsequently they give our conclusions. (shrink)

Dans l'horizon de l’étude de la philosophie naturelle d'Averroès, le nouveau travail de Ruth Glasner intitulé Averroes’ Physics: a Turning Point in Medieval Natural Philosophy occupera assurément une place de premier plan. Dans cet ouvrage, RG propose une étude analytique des trois commentaires d'Averroès à la Physique d'Aristote – l’ Abrégé , le Commentaire Moyen et le Grand Commentaire . La force incontestable de son travail réside tout d'abord dans son approche double du texte d'Averroès, à la fois philologique et (...) théorique. Tout au long de son analyse, ces deux aspects restent intimement liés et la mobilisation des instruments philologiques n'est jamais une fin en soi. Cette analyse a en effet pour but ultime de reconstruire le système du monde tel qu'Averroès le concevait. L'enjeu fondamental de cette étude est alors de supplanter la vision d'un Averroès interprète servile de la physique aristotélicienne et de présenter sa conception de la nature comme un système cohérent, organique et original. (shrink)

A symmetric monoidal category naturally arises as the mathematical structure that organizes physical systems, processes, and composition thereof, both sequentially and in parallel. This structure admits a purely graphical calculus. This paper is concerned with the encoding of a fixed causal structure within a symmetric monoidal category: causal dependencies will correspond to topological connectedness in the graphical language. We show that correlations, either classical or quantum, force terminality of the tensor unit. We also show that well-definedness of the concept of (...) a global state forces the monoidal product to be only partially defined, which in turn results in a relativistic covariance theorem. Except for these assumptions, at no stage do we assume anything more than purely compositional symmetric-monoidal categorical structure. We cast these two structural results in terms of a mathematical entity, which we call a causal category . We provide methods of constructing causal categories, and we study the consequences of these methods for the general framework of categorical quantum mechanics. (shrink)

The concept of emergence has seen a significant resurgence in philosophy and the sciences, yet debates regarding emergentist and reductionist visions of the natural world continue to be hampered by imprecision or ambiguity. Emergent phenomena are said to arise out of and be sustained by more basic phenomena, while at the same time exerting a "top-down" control upon those very sustaining processes. To some critics, this has the air of magic, as it seems to suggest a kind of circular causality. (...) Other critics deem the concept of emergence to be objectionably anti-naturalistic. Objections such as these have led many thinkers to construe emergent phenomena instead as coarse-grained patterns in the world that, while calling for distinctive concepts, do not "disrupt" the ordinary dynamics of the finer-grained (more fundamental) levels. Yet, reconciling emergence with a (presumed) pervasive causal continuity at the fundamental level can seem to deflate emergence of its initially profound significance. This basic problematic is mirrored by similar controversy over how best to characterize the opposite systematizing impulse, most commonly given an equally evocative but vague term, "reductionism." The original essays in this volume help to clarify the alternatives: inadequacies in some older formulations and arguments are exposed and new lines of argument on behalf the two visions are advanced. (shrink)

Femtosecond laser microfabrication has emerged in the last decade as a powerful technique for direct inscription of low loss optical waveguides in practically any transparent dielectric substrate, showing outstanding versatility. Prototyping of new devices is made rapid, cheap and easy: optical circuits are written directly buried in the substrate, using the laser beam as an optical pen, without any need of costly masks as required by conventional photolithography. Many proof-of-principle demonstrations of integrated optics can be obtained, including splitters, directional couplers, (...) and Mach–Zehnder interferometers. Actually, the road towards applications has just been opened, and the unique capabilities of femtosecond laser micromachining will enable achievements inconceivable with other technologies. In this work, the femtosecond laser fabrication technique is discussed, together with its application to the realization of integrated photonic quantum circuits. (shrink)

In seeking an answer to the question of what it means for a theory to be fundamental, it is enlightening to ask why the current best theories of physics are not generally believed to be fundamental. This reveals a set of conditions that a theory of physics must satisfy in order to be considered fundamental. Physics aspires to describe ever deeper levels of reality, which may be without end. Ultimately, at any stage we may not be able to tell whether (...) we've reached rock bottom, or even if there is a base level – nevertheless, I draft a checklist to help us identify when to stop digging, in the case where we may have reached a candidate for a final theory. Given that the list is – according to (current) mainstream belief in high-energy physics – complete, and each criterion well-motivated, I argue that a physical theory that satisfies all the criteria can be assumed to be fundamental in the absence of evidence to the contrary (i.e., I argue that the necessary conditions are jointly sufficient for a claim of fundamentality in physics). (shrink)