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Minimal model of quantum measurements and emergence of classical domainJul 19 2019We propose a minimalistic model of quantum measurements within a finite system that undergoes a regular unitary evolution. Based on information theory, the measurement process requires a sacrifice of information entropy. This loss in our model is represented ... More

The Legacy of George SudarshanJul 12 2019Ennackal Chandy George Sudarshan was born on 16 September 1931 in Pallam, a small village in the Kottayam District of Kerala State, South India.

Theorie der Electrophorese -- Het Relaxatie-EffectJul 12 2019In this thesis, a theoretical treatment of the relation between electrophoretic velocity and the potential of the double layer of colloidal particles is presented. Translators' note: The theory of electrophoresis is one of the foundational topics that ... More

Julian Schwinger and the Semiclassical AtomJul 10 2019In the early 1980s, Schwinger made seminal contributions to the semiclassical theory of atoms. There had, of course, been earlier attempts at improving upon the Thomas--Fermi model of the 1920s. Yet, a consistent derivation of the leading and next-to-leading ... More

Physics and the Totalitarian PrincipleJul 10 2019What is sometimes called the "totalitarian principle," a metaphysical doctrine often associated with the famous physicist Murray Gell-Mann, states that everything allowed by the laws of nature must actually exist. The principle is closely related to the ... More

On QBism and Assumption (Q)Jul 08 2019I correct two misapprehensions, one historical and one conceptual, in the recent literature on extensions of the Wigner's Friend thought-experiment. Perhaps fittingly, both concern the accurate description of some quantum physicists' beliefs by others. ... More

On QBism and Assumption (Q)Jul 08 2019Jul 17 2019I correct two misapprehensions, one historical and one conceptual, in the recent literature on extensions of the Wigner's Friend thought-experiment. Perhaps fittingly, both concern the accurate description of some quantum physicists' beliefs by others. ... More

Quantum states are equivalence classes of stable information, not density operatorsJul 08 2019The Copenhagen interpretation of quantum mechanics, which first took shape in Bohr's landmark 1928 paper on complementarity, remains an enigma. Although many physicists are skeptical about the necessity of Bohr's philosophical conclusions, his pragmatic ... More

Quantum states are equivalence classes of stable information, not density operatorsJul 08 2019Jul 10 2019The Copenhagen interpretation of quantum mechanics, which first took shape in Bohr's landmark 1928 paper on complementarity, remains an enigma. Although many physicists are skeptical about the necessity of Bohr's philosophical conclusions, his pragmatic ... More

Quantum Mechanics of Individual SystemsJul 05 2019A formulation of quantum mechanics, which begins by postulating assertions for individual physical systems, is given. The statistical predictions of quantum mechanics for infinite ensembles are then derived from its assertions for individual systems. ... More

Falsifiability of Isolated Spacetime RegionsJul 05 2019In this work it is pointed out that some physical theories, even being themselves falsifiable, predict the existence of regions of spacetime which are not falsifiable with relation to each other due to their impossibility of mutually exchanging information ... More

Ehrenfest's Theorem RevisitedJul 04 2019Historically, Ehrenfest's theorem (1927) is the first one which shows that classical physics can emerge from quantum physics as a kind of approximation. We recall the theorem in its original form. Next, we highlight its generalizations to the relativistic ... More

Contingent Free Choice: On Extending Quantum Theory to a Contextual, Deterministic Theory With Improved Predictive PowerJul 03 2019The non-extensibility of quantum theory into an extended theory with improved predictive power is based on a strong assumption of independent free choice, in which the physicists pick a measurement axis independently of anything that couldn't have been ... More

Validity of the Einstein Hole ArgumentJul 02 2019Arguing from his "hole" thought experiment, Einstein became convinced that, in cases in which the energy-momentum-tensor source vanishes in a spacetime hole, a solution to his general relativistic field equation cannot be uniquely determined by that source. ... More

A representation of the wavefunction on the 3D-spaceJun 28 2019One of the major concerns of Schr\"odinger, Lorentz, Einstein, and many others about the wavefunction is that it is defined on the $3\mathbf{N}$-dimensional configuration space, rather than on the $3$-dimensional physical space. This gives the impression ... More

Theoretical Equivalence and DualityJun 26 2019Theoretical equivalence and duality are two closely related notions: but their interconnection has so far not been well understood. In this paper I explicate the contribution of a recent schema for duality to discussions of theoretical equivalence. I ... More

Opto-mechanical test of collapse modelsJun 26 2019The gap between the predictions of collapse models and those of standard quantum mechanics widens with the complexity of the involved systems. Addressing the way such gap scales with the mass or size of the system being investigated paves the way to testing ... More

Opto-mechanical tests of collapse modelsJun 26 2019Jul 11 2019The gap between the predictions of collapse models and those of standard quantum mechanics widens with the complexity of the involved systems. Addressing the way such gap scales with the mass or size of the system being investigated paves the way to testing ... More

Editorial note to: Erwin Schrödinger, Dirac electron in the gravitational field IJun 25 2019Editorial Note with a mathematical and historical introduction to a 1932 paper by Erwin Schr\"odinger on the generalization of the Dirac equation to a curved spacetime -- to appear in the 'Golden Oldie' section of the Journal of General Relativity and ... More

Editorial note to: Erwin Schrödinger, Dirac electron in the gravitational field IJun 25 2019Jul 08 2019Editorial Note with a mathematical and historical introduction to a 1932 paper by Erwin Schr\"odinger on the generalization of the Dirac equation to a curved spacetime -- to appear in the 'Golden Oldie' section of the Journal of General Relativity and ... More

Editorial note to: Erwin Schrödinger, Dirac electron in the gravitational field IJun 25 2019Jul 11 2019Editorial Note with a mathematical and historical introduction to a 1932 paper by Erwin Schr\"odinger on the generalization of the Dirac equation to a curved spacetime -- to appear in the 'Golden Oldie' section of the Journal of General Relativity and ... More

Foundations of statistical mechanics and the status of the Born rule in de Broglie-Bohm pilot-wave theoryJun 25 2019Jul 05 2019We compare and contrast two distinct approaches to understanding the Born rule in de Broglie-Bohm pilot-wave theory, one based on dynamical relaxation over time (advocated by this author and collaborators) and the other based on typicality of initial ... More

Foundations of statistical mechanics and the status of the Born rule in de Broglie-Bohm pilot-wave theoryJun 25 2019We compare and contrast two distinct approaches to understanding the Born rule in de Broglie-Bohm pilot-wave theory, one based on dynamical relaxation over time (advocated by this author and collaborators) and the other based on typicality of initial ... More

Comments on the continuing widespread and unnecessary use of a defective emission equation in field emission related literatureJun 24 2019Jun 27 2019Field electron emission (FE) has relevance in many different technological contexts. However, many related technological papers use a physically defective elementary FE equation for local emission current density (LECD). This equation takes the tunneling ... More

Comments on the continuing widespread and unnecessary use of a defective emission equation in field emission related literatureJun 24 2019Field electron emission (FE) has relevance in many different technological contexts. However, many related technological papers use a physically defective elementary FE equation for local emission current density (LECD). This equation takes the tunneling ... More

Equivalence and Duality in ElectromagnetismJun 24 2019In this paper I bring the recent philosophical literature on theoretical equivalence to bear on dualities in physics. Focusing on electromagnetic duality, which is a simple example of S-duality in string theory, I will show that the duality fits naturally ... More

The limits of quantum superposition: Should "Schrödinger's cat" and "Wigner's friend" be considered "miracle" narratives?Jun 23 2019Physicians define death as the "irreversible" breakdown of all brain-functions including brain-stem. By "irreversible" they mean a damage that is beyond the human capacity to restore the patient's healthy state. In the same line I propose to complete ... More

On the Properties of Monocyclic Systems, and others related to themJun 21 2019Translation of Ludwig Boltzmann's paper "\"Uber die Eigenschaften monozyklischer und anderer damit verwandter Systeme" Crelles Journal 98. S. 68-94. 1884 u. 1885 from German into English. In this foundational paper Boltzmann introduced two key concepts ... More

Historical and Philosophical Aspects of the Einstein WorldJun 20 2019This article presents a brief review of some historical and philosophical aspects of Einstein's 1917 paper 'Cosmological Considerations in the General Theory of Relativity', a landmark work that denoted the starting point of modern theoretical cosmology. ... More

How "Facts" Shaped Modern Disciplines: The Fluid Concept of Fact and the Common Origins of German Physics and HistoriographyJun 19 2019This history of the concept of fact reveals that the fact-oriented practices of German physicists and historians derived from common origins. The concept of fact became part of the German language remarkably late. It gained momentum only toward the end ... More

Predicting Research Trends with Semantic and Neural Networks with an application in Quantum PhysicsJun 17 2019The vast and growing number of publications in all disciplines of science cannot be comprehended by a single human researcher. As a consequence, researchers have to specialize in narrow sub-disciplines, which makes it challenging to uncover scientific ... More

Einstein's Working Sheets and His Search For a Unified Field TheoryJun 14 2019The Einstein Archives contain a considerable collection of calculations in the form of working sheets and scratch paper, documenting Einstein's scientific preoccupations during the last three decades of his life until his death in 1955. This paper provides ... More

on some (so-called) paradoxes of quantum physicsJun 13 2019This article is devoted to the study of which appears as the most famous paradoxes of quantum theory (Schrodinger cat, EPR argument and Aspect experiments, delayed choice experiments and retrocausality problems). Through these experiments, physics raises ... More

Reality facing quantum mechanicsJun 13 2019All investigators working on the foundations of quantum mechanics agree that the theory has profoundly modified our conception of reality. But there ends the consensus. The unproblematic formalism of the theory gives rise to a number of very different ... More

Refuting Strong AI: Why Consciousness Cannot Be AlgorithmicJun 11 2019While physicalism requires only that a conscious state depends entirely on an underlying physical state, it is often assumed that consciousness is algorithmic and that conscious states can be copied, such as by copying or digitizing the human brain. In ... More

The Starry Universe of Johannes KeplerJun 10 2019Johannes Kepler described the Copernican universe as consisting of a central, small, brilliant sun with its planetary system, all surrounded by giant stars. These stars were far larger than, and much dimmer than, the sun -- his De Stella Nova shows that ... More

Erwin L. Hahn: A Biographical MemoirJun 08 2019Erwin Louis Hahn was one of the most innovative and influential physical scientists in recent history, impacting generations of scientists through his work in nuclear magnetic resonance (NMR), optics, and the intersection of these two fields. Starting ... More

Kantian and Neo-Kantian First Principles for Physical and Metaphysical CognitionJun 07 2019I argue that Immanuel Kant's critical philosophy---in particular the doctrine of transcendental idealism which grounds it---is best understood as an `epistemic' or `metaphilosophical' doctrine. As such it aims to show how one may engage in the natural ... More

Gödel's incompleteness theorem and Universal physical theoriesJun 06 2019An ultimate Universal theory - a complete theory that accounts, via few and simple first principles, for all the phenomena already observed and that will ever be observed - has been, and still is, the aspiration of most physicists and scientists. Yet, ... More

Probabilistic Explanations and the Derivation of Macroscopic LawsJun 05 2019Jun 16 2019We will discuss the link between scientific explanations and probabilities, specially in relationship with statistical mechanics and the derivation of macroscopic laws from microscopic ones.

Probabilistic Explanations and the Derivation of Macroscopic LawsJun 05 2019We will discuss the link between scientific explanations and probabilities, specially in relationship with statistical mechanics and the derivation of macroscopic laws from microscopic ones.

Vortices and atoms in the Maxwellian eraJun 02 2019The mathematical study of vortices began with Herman von Helmholtz's pioneering study in 1858. It was pursued vigorously over the next two decades, largely by British physicists and mathematicians, in two contexts: Maxwell's vortex analogy for the electromagnetic ... More

Killing Science Fiction: Why Conscious States Cannot Be Copied or RepeatedJun 01 2019Several philosophical problems arising from the physics of consciousness, including identity, duplication, teleportation, simulation, self-location, and the Boltzmann Brain problem, hinge on one of the most deeply held but unnecessary convictions of physicalism: ... More

Bose's derivation, the crucial link to quantum mechanicsMay 28 2019In this brief note I address the question not frequently asked, namely, why did it take two decades between Einstein's first proposal of photons and derivation of the full Planck formula from first principles of Statistical Mechanics, albeit with a fundamental ... More

The comprehensive theory of lightMay 28 2019Modern attempts to understand light go back to Newton who considered light to be particles, the so called corpuscular theory, and the other school of Huygens, Young and others. Huygens and Young viewpoint emphasised the wave property. This difference ... More

Investigations into the origin of Einstein's SinkMay 22 2019Einstein's sink is a well-known object among physics and astronomy students at Leiden University. Stories about its origin have been passed down since it was moved to the large lecture room of the then newly built Oort Building in 1998. These stories ... More

Investigations into the origin of Einstein's SinkMay 22 2019May 28 2019Einstein's sink is a well-known object among physics and astronomy students at Leiden University. Stories about its origin have been passed down since it was moved to the large lecture room of the then newly built Oort Building in 1998. These stories ... More

On a recently proposed dating of the foundation of Julia Augusta Taurinorum (Torino)May 22 2019Recently, a preprint [arXiv:1901.08545] and a series of news announced that Torino, as the roman Augusta Taurinorum, was founded on 30 January 9 BC. The assumption is based on the coincidence of the Julian date, obtained by means of astronomical calculations, ... More

Occurrence of Great Magnetic Storms on 6-8 March 1582May 20 2019Although knowing the occurrence frequency of severe space weather events is important for a modern society, it is insufficiently known due to the lack of magnetic or sunspot observations, before the Carrington event in 1859 known as one of the largest ... More

On the Philosophical Foundations of Physics: An Experimentalist's PerspectiveMay 17 2019Since I first became enthralled with physics as a teenager, I've been intrigued by the philosophical aspects of the discipline. As I approached the end of my career as an experimental physicist and observational astronomer (I'm now retired), I decided ... More

Exploring Gravitational LensingMay 17 2019In this article, we discuss the idea of gravitational lensing, from a systematic, historical and didactic point of view. We show how the basic lensing equation together with the concepts of geometrical optics opens a space of implications that can be ... More

"B" is for BohrMay 17 2019I suggest that the "B" in QBism should stand for Bohr. The paper begins by explaining why Bohr seems obscure to most physicists. Having identified the contextuality of physical quantities as Bohr's essential contribution to Kant's theory of science, I ... More

Tokyo Wheeler or the Epistemic Preconditions of the Renaissance of RelativityMay 15 2019During the period identified as the Rebirth of General Relativity, John Wheeler was instrumental in retrieving the physics of gravity that had become hidden behind the mathematical formalism. For Wheeler himself the change in point of view was not from ... More

On Symmetry and DualityMay 15 2019We advocate an account of dualities between physical theories: the basic idea is that dual theories are isomorphic representations of a common core. We defend and illustrate this account, which we call a Schema, in relation to symmetries. Overall, the ... More

On Symmetry and DualityMay 15 2019Jun 05 2019We advocate an account of dualities between physical theories: the basic idea is that dual theories are isomorphic representations of a common core. We defend and illustrate this account, which we call a Schema, in relation to symmetries. Overall, the ... More

Alternative Decohering Histories in Quantum MechanicsMay 14 2019We continue our efforts to understand, within the framework of the quantum mechanics of the universe as a whole, the quasiclassical realm of familiar experience as a feature emergent from the Hamiltonian of the elementary particles and the initial condition ... More

Quantum Reality, Perspectivalism and CovarianceMay 13 2019Paul Busch has emphasized on various occasions the importance for physics of going beyond a merely instrumentalist view of quantum mechanics. Even if we cannot be sure that any particular realist interpretation describes the world as it actually is, the ... More

Defining what is Quantum: Not all what matters for physical phenomena is contained in space-timeMay 13 2019It is argued that the three main quantum interpretations, Copenhagen, de Broglie-Bohm, and Many-Worlds, support the Principle Q (Quantum): Not all what matters for physical phenomena is contained in space-time. This principle underpins Born's rule as ... More

Some considerations on Determinism and Free WillMay 12 2019This article has been written, in a slightly different version, as an introductory chapter for the book collecting the essays of theoretical physicist Gerard 't Hooft, philosopher Emanuele Severino, and theologian Piero Coda, and inspired by the talks ... More

Kepler-9: the First Multi-Transiting System and the First Transit Timing VariationsMay 11 2019Kepler-9, discovered by Holman et al. 2010, was the first system with multiple confirmed transiting planets and the first system to clearly show long-anticipated transit timing variations (TTVs). We review the historical circumstances behind the discovery ... More

From path integrals to dynamical algebras: a macroscopic view of quantum physicsMay 10 2019The essence of the path integral method in quantum physics can be expressed in terms of two relations between unitary propagators, describing perturbations of the underlying system. They inherit the causal structure of the theory and its invariance properties ... More

Archaeoastronomy in northern Chile: Andean churches of the Arica and Parinacota regionMay 08 2019We present the results obtained from the analysis of the precise spatial orientations of almost forty old colonial Christian churches located in the Arica and Parinacota region. This is an extended and difficult to travel area that received little attention ... More

Putting Positrons into Classical Dirac Field TheoryMay 06 2019One way of arriving at a quantum field theory of electrons and positrons is to take a classical theory of the Dirac field and then quantize. Starting with the standard classical field theory and quantizing in the most straightforward way yields an inadequate ... More

Points. Lack thereofMay 05 2019I will discuss some aspects of the concept of "point" in quantum gravity, using mainly the tool of noncommutative geometry. I will argue that at Planck's distances the very concept of point may loose its meaning. I will then show how, using the spectral ... More

Points. Lack thereofMay 05 2019May 08 2019I will discuss some aspects of the concept of "point" in quantum gravity, using mainly the tool of noncommutative geometry. I will argue that at Planck's distances the very concept of point may lose its meaning. I will then show how, using the spectral ... More

Irreversibility and typicality: A simple analytical result for the Ehrenfest modelMay 03 2019With the aid of simple analytical computations for the Ehrenfest model, we clarify some basic features of macroscopic irreversibility. The stochastic character of the model allows us to give a non-ambiguous interpretation of the general idea that irreversibility ... More

No master (key) No (measurement) problemApr 30 2019Can normal science-in the Kuhnian sense-add something substantial to the discussion about the measurement problem? Does an extended Wigner's-friend Gedankenexperiment illustrate new issues? Or a new quality of known issues? Are we led to new interpretations, ... More

Foundations of quantum physics IV. More on the thermal interpretationApr 29 2019This paper continues the discussion of the thermal interpretation of quantum physics. While Part II and Part III of this series of papers explained and justified the reasons for the departure from tradition, the present Part IV summarizes the main features ... More

Foundations of quantum physics IV. More on the thermal interpretationApr 29 2019May 19 2019This paper continues the discussion of the thermal interpretation of quantum physics. While Part II and Part III of this series of papers explained and justified the reasons for the departure from tradition, the present Part IV summarizes the main features ... More

The influence of gravity on the Boltzmann entropy of a closed universeApr 26 2019May 31 2019This contribution inquires into Clausius' proposal that "the entropy of the world tends to a maximum.'" The question is raised whether the entropy of "the world" actually does have a maximum; and if the answer is "Yes!," what such states of maximum entropy ... More

The third law of thermodynamics or an absolute definition for Entropy. Part 2 : definitions and applicationsApr 26 2019This paper is the second part of a previous paper dealing with the need to define the entropy with an absolute way, by using the third law of thermodynamics. In this second part it is shown that there is a need to define a potential temperature which ... More

The third law of thermodynamics or an absolute definition for Entropy. Part 1 : the origin and applications in thermodynamicsApr 26 2019This article describes the third law of thermodynamics. This law is often poorly known and is often decried, or even considered optional and irrelevant to describe weather and climate phenomena. This, however, is inaccurate and contrary to scientific ... More

The third law of thermodynamics or an absolute definition for Entropy. Part 1 : the origin and applications in thermodynamicsApr 26 2019May 29 2019This article describes the third law of thermodynamics. This law is often poorly known and is often decried, or even considered optional and irrelevant to describe weather and climate phenomena. This, however, is inaccurate and contrary to scientific ... More

The Struble-Einstein CorrespondenceApr 25 2019This article presents hitherto unpublished correspondence of Struble in 1947 with Menger, Chandrasekhar, and eventually Einstein, about a possible observational test supporting Einstein's special relativity against Ritz's emission theory using binary ... More

Microscopic laws vs. Macroscopic laws: Perspectives from kinetic theory and hydrodynamicsApr 25 2019Reductionism is a prevalent viewpoint in science according to which all physical phenomena can be understood from fundamental laws of physics. Anderson [Science, 177, 393 (1972)], Laughlin and Pines [PNAS, 97, 28 (2000)], and others have countered this ... More

No-Go Theorems and the Foundations of Quantum PhysicsApr 24 2019In the history of quantum physics several no-go theorems have been proved, and many of them have played a central role in the development of the theory, such as Bell's or the Kochen-Specker theorem. A recent paper by F. Laudisa has raised reasonable doubts ... More

Is Quantum Mechanics Self-Interpreting?Apr 24 2019Fuchs and Peres (2000) claimed that standard Quantum Mechanics needs no interpretation. In this essay, I show the flaws of the arguments presented in support to this thesis. Specifically, it will be claimed that the authors conflate QM with Quantum Bayesianism ... More

Einstein sticks out his tongueApr 22 2019Apr 24 2019This article focuses on the second part of Albert Einsteins's life in the USA after 1933. It is a attempt of the author to aproach the life and achievements of Albert Einsteins from a different perspective, as well as the encouragement for the reader ... More

Einstein sticks out his tongueApr 22 2019This article focuses on the second part of Albert Einsteins's life in the USA after 1933. It is a attempt of the author to aproach the life and achievements of Albert Einsteins from a different perspective, as well as the encouragement for the reader ... More

Einstein sticks out his tongueApr 22 2019Apr 30 2019arXiv admin note: This submission has been withdrawn by arXiv administrators due to inflammatory content and unprofessional language

Symbols and astrological terms in ancient arabic inscriptionsApr 19 2019In the past, the Arabs in Al-Hara Zone used many stars to deduce the seasons of the year and also to deduce the roads, at that time this was the most convenient way to figure their ways and to know the time of the year they have to travel or to planet, ... More

Naturalness as a reasonable scientific principle in fundamental physicsApr 19 2019I aim to clarify the physical content and significance of naturalness. Physicists' earliest understanding of naturalness, as an autonomy of scales (AoS) requirement provides the most cogent definition of naturalness and I will assert that i) this provides ... More

Lorentz-invariant, retrocausal, and deterministic hidden variablesApr 17 2019We review several no-go theorems attributed to Gisin and Hardy, Conway and Kochen purporting the impossibility of Lorentz-invariant deterministic hidden-variable model for explaining quantum nonlocality. Those theorems claim that the only known solution ... More

Sacred Landscape of the Incas in Central Chile: Radial Ceque System Encoded in the Archeological Site Ruinas de ChadaApr 16 2019Mounts and hills played a predominant role in all pre-Hispanic Andean cultures, especially for the Inca culture. Through the use of georeferenced orthophotography, we found that the Inca site, Ruinas de Chada, represents the origin of a radial ceque system ... More

Wigner and his many friends: A new no-go result?Apr 16 2019In April 2016, Daniela Frauchiger and Renato Renner published an article online in which they introduce a Gedankenexperiment that led them to conclude that single-world interpretation of quantum theory cannot be self-consistent. In a new version of the ... More

Einstein's biggest mistake?Apr 15 2019What, if any, was Einstein's biggest mistake, the one most affecting our physics today? There is a perhaps apocryphal story, recounted by George Gamow, that he counted his cosmological constant as his biggest blunder. We now know his hypothesized cosmological ... More

Explore with caution: mapping the evolution of scientific interest in PhysicsApr 12 2019In the book The Essential Tension Thomas Kuhn described the conflict between tradition and innovation in scientific research --i.e., the desire to explore new promising areas, counterposed to the need to capitalize on the work done in the past. While ... More

Uncertainty from Heisenberg to TodayApr 12 2019We explore the different meanings of "quantum uncertainty" contained in Heisenberg's seminal paper from 1927, and also some of the precise definitions that were explored later. We recount the controversy about "Anschaulichkeit", visualizability of the ... More

A spacetime ontology compatible with quantum mechanicsApr 09 2019The ontology proposed in this paper is aimed at demonstrating that it is possible to understand the counter-intuitive predictions of quantum mechanics while still retaining much of the framework underlying classical physics, the implication being that ... More

On Representational Redundancy, Surplus Structure, and the Hole ArgumentApr 09 2019We address a recent proposal concerning 'surplus structure' due to Nguyen et al. ['Why Surplus Structure is Not Superfluous.' Br. J. Phi. Sci. Forthcoming.] We argue that the sense of 'surplus structure' captured by their formal criterion is importantly ... More

Bhasvati of Satananda: In the Pages of MysteryApr 07 2019Satanandacharya the astronomer and mathematician of 11th century was born in 1068 C.E. at Purusottamdham Puri of Odisha wrote the scripture Bhasvati in 1099 C.E.. The scripture has significant contribution to world of Astronomy and Mathematics. Satananda ... More

Emergence and Correspondence for String Theory Black HolesApr 05 2019This is one of a pair of papers that give a historical-\emph{cum}-philosophical analysis of the endeavour to understand black hole entropy as a statistical mechanical entropy obtained by counting string-theoretic microstates. Both papers focus on Andrew ... More

Conceptual Analysis of Black Hole Entropy in String TheoryApr 05 2019The microscopic state counting of the extremal Reissner-Nordstr\"om black hole performed by Andrew Strominger and Cumrun Vafa in 1996 has proven to be a central result in string theory. Here, with a philosophical readership in mind, the argument is presented ... More

The experiment paradox in physicsApr 05 2019Modern physics is founded on two mainstays: mathematical modelling and empirical verification. These two assumptions are prerequisite for the objectivity of scientific discourse. Here we show, however, that they are contradictory, leading to the `experiment ... More

Discovery goals and opportunities in high energy physics: a defense of BSM-oriented exploration over signalismApr 04 2019Discoveries come through exclusions, confirmations or revolutionary findings with respect to a theory canon populated by the Standard Model (SM) and beyond the SM (BSM) theories. Guaranteed discoveries are accomplished only through pursuit of BSM exclusion/confirmation, ... More

Why did Einstein Reject the November Tensor in 1912-1913, only to Come Back to it in November 1915?Apr 03 2019The question of Einstein's rejection of the November tensor is re-examined in light of conflicting answers by several historians. I discuss these conflicting conjectures in view of three questions that should inform our thinking: Why did Einstein reject ... More

Professor Chen Ping Yang's early significant contributions to mathematical physicsApr 03 2019In the 60's Professor Chen Ping Yang with Professor Chen Ning Yang published several seminal papers on the study of Bethe's hypothesis for various problems of physics. The works on the lattice gas model, critical behaviour in liquid-gas transition, the ... More

The Practice of Naturalness: A Historical-Philosophical PerspectiveApr 02 2019The fact that no evidence of new physics was found so far by LHC experiments has led some to call for the abandonment of the naturalness criterion. Others, on the contrary, have felt the need to break a lance in its defense by claiming that it should ... More

Research on asteroids of Christian Ludwig Gerling and his students in the nineteenth centuryMar 29 2019One of the mayor topics in astronomy at the beginning of the 19th century was the interpretation of the observations of the first asteroids. In 1810 Christian Ludwig Gerling at the age of twenty two came to G\"ottingen University to continue his academic ... More

The Beginning of Gamma AstronomyMar 27 2019In the first part of this paper we summarize the discovery and the early study of the gamma-ray bursts. The second part studies the spatial and sky distribution of the bursters. The brightness distribution is also studied. In the conclusion we discuss ... More