Search results for 'Time measurements' (try it on Scholar)

1000+ found
Order:
  1.  23
    Edward A. Desloge (1989). A Theoretical Device for Space and Time Measurements. Foundations of Physics 19 (10):1191-1213.
    A theoretical device, which incorporates the functions of clock, rod, nonrotating platform, and accelerometer, and whose operation depends on the properties of light rays and free particles, is defined. The device, which we call a metrosphere, is simple enough that it can be introduced at the starting point of relativity theory and versatile enough that it can serve as an aid in the development and conceptualization of the theory. Relative to an inertial frame, a moving metrosphere undergoes a Lorentz-Fitzgerald contraction (...)
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography  
  2.  17
    Avshalom C. Elitzur & Shahar Dolev (2008). Undoing Quantum Measurements: Novel Twists to the Physical Account of Time. In World Scientific (ed.), Physics of Emergence and Organization. 61--75.
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography   1 citation  
  3. F. J. Belinfante (1979). Measurements and Time Reversal in Objective Quantum Theory. British Journal for the Philosophy of Science 30 (2):187-191.
     
    Export citation  
     
    My bibliography   6 citations  
  4. Harvey R. Brown (1979). ELINFANTE, F. J.: "Measurements and Time Reversal in Objective Quantum Theory". [REVIEW] British Journal for the Philosophy of Science 30:187.
     
    Export citation  
     
    My bibliography  
  5. Peter W. Travis (1997). Chaucer's Chronographiae, the Confounded Reader, and Fourteenth-Century Measurements of Time. Disputatio 2:1-34.
    No categories
     
    Export citation  
     
    My bibliography  
  6. Alexander Waugh (1999). Time: From Micro-Seconds to Millennia, a Search for the Right Time. Headline Book Pub..
     
    Export citation  
     
    My bibliography  
  7.  66
    Charis Anastopoulos (2006). Classical Versus Quantum Probability in Sequential Measurements. Foundations of Physics 36 (11):1601-1661.
    We demonstrate in this paper that the probabilities for sequential measurements have features very different from those of single-time measurements. First, they cannot be modelled by a classical stochastic process. Second, they are contextual, namely they depend strongly on the specific measurement scheme through which they are determined. We construct Positive-Operator-Valued measures (POVM) that provide such probabilities. For observables with continuous spectrum, the constructed POVMs depend strongly on the resolution of the measurement device, a conclusion that (...)
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography  
  8.  29
    J. Kiukas, A. Ruschhaupt & R. F. Werner (2009). Tunneling Times with Covariant Measurements. Foundations of Physics 39 (7):829-846.
    We consider the time delay of massive, non-relativistic, one-dimensional particles due to a tunneling potential. In this setting the well-known Hartman effect asserts that often the sub-ensemble of particles going through the tunnel seems to cross the tunnel region instantaneously. An obstacle to the utilization of this effect for getting faster signals is the exponential damping by the tunnel, so there seems to be a trade-off between speedup and intensity. In this paper we prove that this trade-off is never (...)
    Direct download (4 more)  
     
    Export citation  
     
    My bibliography  
  9. Robert DiSalle (2006). Understanding Space-Time: The Philosophical Development of Physics From Newton to Einstein. Cambridge University Press.
    Presenting the history of space-time physics, from Newton to Einstein, as a philosophical development DiSalle reflects our increasing understanding of the connections between ideas of space and time and our physical knowledge. He suggests that philosophy's greatest impact on physics has come about, less by the influence of philosophical hypotheses, than by the philosophical analysis of concepts of space, time, and motion and the roles they play in our assumptions about physical objects and physical measurements. (...)
    Direct download  
     
    Export citation  
     
    My bibliography   13 citations  
  10.  13
    Martha Blassnigg (2010). Revisiting Marey's Applications of Scientific Moving Image Technologies in the Context of Bergson's Philosophy: Audio-Visual Mediation and the Experience of Time. [REVIEW] Medicine Studies 2 (3):175-184.
    This paper revisits some early applications of audio-visual imaging technologies used in physiology in a dialogue with reflections on Henri Bergson’s philosophy. It focuses on the aspects of time and memory in relation to spatial representations of movement measurements and critically discusses them from the perspective of the observing participant and the public exhibitions of scientific films. Departing from an audio-visual example, this paper is informed by a thick description of the philosophical implications and contemporary discourses surrounding the (...)
    Direct download (5 more)  
     
    Export citation  
     
    My bibliography  
  11.  44
    Y. Jack Ng & H. Van Dam (2000). Measuring the Foaminess of Space-Time with Gravity-Wave Interferometers. Foundations of Physics 30 (5):795-805.
    By analyzing a gedanken experiment designed to measure the distance l between two spatially separated points, we find that this distance cannot be measured with uncertainty less than (ll 2 P) 1/3 , considerably larger than the Planck scale lP (or the string scale in string theories), the conventional-wisdom uncertainty in distance measurements. This limitation to space-time measurements is interpreted as resulting from quantum fluctuations of space-time itself. Thus, at very short distance scales, space-time is (...)
    Direct download (5 more)  
     
    Export citation  
     
    My bibliography  
  12.  38
    E. Papp (1983). Light-Cone Approach to the Quantum Space-Time Description. Foundations of Physics 13 (11):1155-1165.
    Proofs have been given that the light-cone approximation can be analyzed in terms of the extended quantum-mechanical description of the space-time measurements by the complex numbers. It is then proved that the so established description is able to support both the asymptotical scale-invariant cross sections and the threshold behavior of the high-energy production processes.
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography  
  13. Peter Janich (1997). Das Mass der Dinge Protophysik von Raum, Zeit Und Materie.
    No categories
    Translate
     
     
    Export citation  
     
    My bibliography   1 citation  
  14. Flavia Santoianni, The Concept of Time in Early Twentieth-Century Philosophy.
    Augustine’s analysis of time in Book XI of Confessions represents for Ludwig Wittgenstein a good example of a philosophical question. In dealing with such theme, his thought undergoes relevant changes. In the Philosophical Remarks, written more than 10 years after the drafting of the Tractatus, the Austrian philosopher holds that the essence of the world can be expressed in the grammar of language. Philosophy as “custodian” of grammar can grasp the essence of the world by excluding nonsensical combinations of (...)
    No categories
    Direct download  
     
    Export citation  
     
    My bibliography  
  15.  98
    Tomasz Placek (2000). Stochastic Outcomes in Branching Space-Time: Analysis of Bell's Theorem. British Journal for the Philosophy of Science 51 (3):445-475.
    The paper extends the framework of outcomes in branching space-time (Kowalski and Placek [1999]) by assigning probabilities to outcomes of events, where these probabilities are interpreted either epistemically or as weighted possibilities. In resulting models I define the notion of common cause of correlated outcomes of a single event, and investigate which setups allow for the introduction of common causes. It turns out that a deterministic common cause can always be introduced, but (surprisingly) only special setups permit the introduction (...)
    Direct download (7 more)  
     
    Export citation  
     
    My bibliography   11 citations  
  16.  16
    Tianjaio Chu, Two Statistical Problems for Inference to Regulatory Structure From Associations of Gene Expression Measurements with Microarrays.
    Of the many proposals for inferring genetic regulatory structure from microarray measurements of mRNA transcript hybridization, several aim to estimate regulatory structure from the associations of gene expression levels measured in repeated samples. The repeated samples may be from a single experimental condition, or from several distinct experimental conditions; they may be “equilibrium” measurements or time series; the associations may be estimated by correlation coefficients or by conditional frequencies (for discretized measurements) or by some other statistic. (...)
    Translate
      Direct download  
     
    Export citation  
     
    My bibliography   3 citations  
  17. W. David Sharp & Niall Shanks (1993). The Rise and Fall of Time-Symmetrized Quantum Mechanics. Philosophy of Science 60 (3):488-499.
    In the context of a discussion of time symmetry in the quantum mechanical measurement process, Aharonov et al. (1964) derived an expression concerning probabilities for the outcomes of measurements conducted on systems which have been pre- and postselected on the basis of both preceding and succeeding measurements. Recent literature has claimed that a resulting "time-symmetrized" interpretation of quantum mechanics has significant implications for some basic issues, such as contextuality and determinateness, in elementary, nonrelativistic quantum mechanics. Bub (...)
    Direct download (6 more)  
     
    Export citation  
     
    My bibliography   4 citations  
  18. Michael B. Mensky (1997). Decoherence in Continuous Measurements: From Models to Phenomenology. [REVIEW] Foundations of Physics 27 (12):1637-1654.
    Decoherence is the name for the complex of phenomena leading to appearance of classical features of quantum systems. In the present paper decoherence in continuous measurements is analyzed with the help of restricted path integrals (RPI) and (equivalently in simple cases) complex Hamiltonians. A continuous measurement results in a readout giving information in the classical form on the evolution of the measured quantum system. The quantum features of the system reveal themselves in the variation of possible measurement readouts. For (...)
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography  
  19.  79
    Paul Busch (1990). On the Energy-Time Uncertainty Relation. Part II: Pragmatic Time Versus Energy Indeterminacy. [REVIEW] Foundations of Physics 20 (1):33-43.
    The discussion of a particular kind of interpretation of the energy-time uncertainty relation, the “pragmatic time” version of the ETUR outlined in Part I of this work [measurement duration (pragmatic time) versus uncertainty of energy disturbance or measurement inaccuracy] is reviewed. Then the Aharonov-Bohm counter-example is reformulated within the modern quantum theory of unsharp measurements and thereby confirmed in a rigorous way.
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography   2 citations  
  20. Thomas Filk (2013). Temporal Non-Locality. Foundations of Physics 43 (4):533-547.
    In this article I investigate several possibilities to define the concept of “temporal non-locality” within the standard framework of quantum theory. In particular, I analyze the notions of “temporally non-local states”, “temporally non-local events” and “temporally non-local observables”. The idea of temporally non-local events is already inherent in the standard formalism of quantum mechanics, and Basil Hiley recently defined an operator in order to measure the degree of such a temporal non-locality. The concept of temporally non-local states enters as soon (...)
    Direct download (5 more)  
     
    Export citation  
     
    My bibliography  
  21.  79
    Henryk Arodź & Maria Massalska-Arodź (2008). Physics of Time. Dialogue and Universalism 18 (9-10):55-69.
    Our article is an overview of a selection of findings in physics relating to the issue of time—we do not present in it any “time theory” of our own. After making some general remarks on the issue of time, we present historical outline and a brief description of the current state of time interval measurements. Subsequently, we go on to discuss certain (relating to the concept of time) consequences of both theories of relativity: special (...)
    Direct download (4 more)  
     
    Export citation  
     
    My bibliography  
  22.  52
    Ronald G. Newburgh (1975). Pulse Widths and Time Dilatation. Foundations of Physics 5 (3):399-405.
    The temporal widths of a light pulse as measured in different inertial frames are shown to have a relation more complicated than that of a simple time dilatation. The result is compared with the dilatation in the twin paradoxGedanken experiment. The light pulse measurement requires two observers in two different frames. The measurements of the observers are compared. For the twin experiment a comparison is made between two clocks which have undergone different histories between the two points at (...)
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography  
  23.  34
    Ruth E. Kastner (2003). The Nature of the Controversy Over Time‐Symmetric Quantum Counterfactuals. Philosophy of Science 70 (1):145-163.
    It is proposed that the recent controversy over "time-symmetric quantum counterfactuals" (TSQCs), based on the Aharonov-Bergmann-Lebowitz Rule for measurements of pre- and post-selected systems, can be clarified by taking TSQCs to be counterfactuals with a specific type of compound antecedent. In that case, inconsistency proofs such as that of Sharp and Shanks (1993) are not applicable, and the main issue becomes not whether such statements are true, but whether they are nontrivial. The latter question is addressed and answered (...)
    Direct download (9 more)  
     
    Export citation  
     
    My bibliography   2 citations  
  24.  35
    Eduard Prugovečki (1982). Time-Energy Uncertainty and Relativistic Canonical Commutation Relations in Quantum Spacetime. Foundations of Physics 12 (6):555-564.
    It is shown that the time operatorQ 0 appearing in the realization of the RCCR's [Qμ,Pv]=−jhgμv, on Minkowski quantum spacetime is a self adjoint operator on Hilbert space of square integrable functions over Σ m =σ×v m , where σ is a timelike hyperplane. This result leads to time-energy uncertainty relations that match their space-momentum counterparts. The operators Qμ appearing in Born's metric operator in quantum spacetime emerge as internal spacetime operators for exciton states, and the condition that (...)
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography  
  25.  33
    Andrew Khrennikov (1996). The Ultrametric Hilbert-Space Description of Quantum Measurements with a Finite Exactness. Foundations of Physics 26 (8):1033-1054.
    We provide a mathematical description of quantum measurements with a finite exactness. The exactness of a quantum measurement is used as a new metric on the space of quantum states. This metric differs very much from the standard Euclidean metric. This is the so-called ultrametric. We show that a finite exactness of a quantum measurement cannot he described by real numbers. Therefore, we must change the basic number field. There exist nonequivalent ultrametric Hilbert space representations already in the finite-dimensional (...)
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography  
  26.  3
    Sophie Poirot-Delpech & Laurence Raineau (forthcoming). Nuclear Waste Facing the Test of Time: The Case of the French Deep Geological Repository Project. Science and Engineering Ethics:1-18.
    The purpose of this article is to consider the socio-anthropological issues raised by the deep geological repository project for high-level, long-lived nuclear waste. It is based on fieldwork at a candidate site for a deep storage project in eastern France, where an underground laboratory has been studying the feasibility of the project since 1999. A project of this nature, based on the possibility of very long containment, involves a singular form of time. By linking project performance to (...)
    Direct download (2 more)  
     
    Export citation  
     
    My bibliography  
  27.  44
    M. Bitbol (1988). The Concept of Measurement and Time Symmetry in Quantum Mechanics. Philosophy of Science 55 (3):349-375.
    The formal time symmetry of the quantum measurement process is extensively discussed. Then, the origin of the alleged association between a fixed temporal direction and quantum measurements is investigated. It is shown that some features of such an association might arise from epistemological rather than purely physical assumptions. In particular, it is brought out that a sequence of statements bearing on quantum measurements may display intrinsic asymmetric properties, irrespective of the location of corresponding measurements in (...) t of the Schrodinger equation. The situation of an observer performing two measurements in two opposite directions of t is eventually investigated. Essential differences are found between two descriptions of this situation: the internal one (taking only into account what is recorded in the observer's memory) and the external one (whereby the observer is considered as a quantum system ruled by the Schrodinger equation). Finally, a method allowing several observers to establish a correspondence between their memory sizes is analyzed. The most important facts that usually lead to the associating of a preferential temporal direction with quantum measurements may be inferred from this correspondence. (shrink)
    Direct download (7 more)  
     
    Export citation  
     
    My bibliography   2 citations  
  28.  82
    Abner Shimony (1996). A Bayesian Examination of Time-Symmetry in the Process of Measurement. Erkenntnis 45 (2-3):337 - 348.
    We investigate the thesis of Aharonov, Bergmann, and Lebowitz that time-symmetry holds in ensembles defined by both an initial and a final condition, called preand postselected ensembles. We distinguish two senses of time symmetry and show that the first one, concerning forward directed and time reversed measurements, holds if the measurement process is ideal, but fails if the measurement process is non-ideal, i.e., violates Lüders's rule. The second kind of time symmetry, concerning the interchange of (...)
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography  
  29.  4
    H. Schmidgen (2003). Time and Noise: The Stable Surroundings of Reaction Experiments, 1860-1890. Studies in History and Philosophy of Science Part C 34 (2):237-275.
    The 'Reaction experiment with Hipp chronoscope' is one of the classical experiments of modern psychology. This paper investigates the technological contexts of this experiment. It argues that the development of time measurement and communication in other areas of science and technology (astronomy, the clock industry) were decisive for shaping the material culture of experimental in psychology. The chronoscope was constructed by Matthaus Hipp (1813-1893) in the late 1840s. In 1861, Adolphe Hirsch (1830-1901) introduced the chronoscope for measuring the 'physiological (...)
    Direct download (4 more)  
     
    Export citation  
     
    My bibliography   2 citations  
  30.  25
    A. K. A. Maciel & J. Tiomno (1989). Analysis of Absolute Space-Time Lorentz Theories. Foundations of Physics 19 (5):505-519.
    Two particular forms of absolute space-time theories are examined. There follows a derivation of their predictions for measurements that are within present-day detection limits.
    Direct download (4 more)  
     
    Export citation  
     
    My bibliography  
  31.  8
    Friedel Weinert (2013). EPR and the 'Passage' of Time. Philosophia Naturalis 50 (2):173-199.
    The essay revisits the puzzle of the 'passage' of time in relation to EPR-type measurements and asks what philosophical consequences can be drawn from them. Some argue that the lack of invariance of temporal order in the measurement of a space-like related EPR pair, under relativistic motion, casts serious doubts on the 'reality' of the lapse of time. Others argue that certain features of quantum mechanics establish a tensed theory of time – understood here as Possibilism (...)
    No categories
    Direct download (4 more)  
     
    Export citation  
     
    My bibliography  
  32.  1
    T. M. Arnesen (2003). Quantifying Quality of Life for Economic Analysis: Time Out for Time Trade Off. Medical Humanities 29 (2):81-86.
    The “Time trade-off” (TTO), is the most widely used method to “quality adjust” life years for “QALYs” in cost utility analysis. In this paper we ask if it is theoretically likely that the TTO is valid for this use. The TTO consists in a trade off between longevity and quality of life. Firstly, we argue that it is impossible to control for all factors that may influence one’s willingness to sacrifice lifetime. Secondly, that longevity and quality of life are (...)
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography   1 citation  
  33.  9
    Ronald G. Newburgh (1978). Syntopic Measurements: A New Classification of Spacetime Measurement. [REVIEW] Foundations of Physics 8 (5-6):393-398.
    Measurements in spacetime can be classified as spacelike or timelike, according to the positional and temporal characteristics of the measuring process. A well-known adjective for the spacelike measurement is “synchronous.” To describe the timelike measurement the term “syntopic” is introduced. The use of these terms is illustrated in discussing the measurement of time dilatation and the Lorentz contraction.
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography  
  34.  22
    Alisa Bokulich (2003). Quantum Measurements and Supertasks. International Studies in the Philosophy of Science 17 (2):127 – 136.
    This article addresses the question whether supertasks are possible within the context of non-relativistic quantum mechanics. The supertask under consideration consists of performing an infinite number of quantum mechanical measurements in a finite amount of time. Recent arguments in the physics literature claim to show that continuous measurements, understood as N discrete measurements in the limit where N goes to infinity, are impossible. I show that there are certain kinds of measurements in quantum mechanics for (...)
    Direct download (4 more)  
     
    Export citation  
     
    My bibliography  
  35.  7
    M. A. Braun & K. Urbanowski (1992). On the Description of Multiple Measurements of an Unstable State. Foundations of Physics 22 (4):617-630.
    The nondecay probability of an unstable particle at a definite moment of time is investigated provided this particle existed at all earlier observation moments separated with the time interval Δ. Using the usual postulates for quantum measurements it is proved that this probability is described by the exponential function of Δ>0, and it tends to 1 as Δ → 0. An approximate formula is found for the effective decay width Γ(Δ) appearing in the case of multiple (...). It is shown that Γ(Δ) → 0 as Δ → 0. For Δ → ∞, the width Γ(Δ) → Γ0, with Γ0 being the standard decay with in Weisskopf-Wigner theory. At finite δ's Γ(Δ) may be smaller or greater than Γ0 depending on the parameters of the theory. (shrink)
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography  
  36. P. C. W. Davies, Time-Dependent Quantum Weak Values: Decay Law for Post-Selected States.
    Weak measurements offer new insights into the behavior of quantum systems. Combined with post-selection, quantum mechanics predicts a range of new experimentally testable phenomena. In this paper I consider weak measurements performed on time-dependent pre- and post-selected ensembles, with emphasis on the decay of excited states. The results show that the standard exponential decay law is a limiting case of a more general law that depends on both the time of post-selection and the choice of final (...)
    Translate
     
     
    Export citation  
     
    My bibliography  
  37.  10
    Clark Glymour, Two Statistical Problems for Inference to Regulatory Structure From Associations of Gene Expression Measurements with Microarrays.
    Of the many proposals for inferring genetic regulatory structure from microarray measurements of mRNA transcript hybridization, several aim to estimate regulatory structure from the associations of gene expression levels measured in repeated samples. The repeated samples may be from a single experimental condition, or from several distinct experimental conditions; they may be “equilibrium” measurements or time series; the associations may be estimated by correlation coefficients or by conditional frequencies (for discretized measurements) or by some other statistic. (...)
    Direct download (2 more)  
     
    Export citation  
     
    My bibliography  
  38.  6
    V. Carli, G. Hadlaczky, C. Wasserman, N. Stingelin-Giles, S. Reiter-Theil & D. Wasserman (2012). Maintaining Confidentiality in Prospective Studies: Anonymous Repeated Measurements Via Email (ARME) Procedure. Journal of Medical Ethics 38 (2):127-129.
    Respecting and protecting the confidentiality of data and the privacy of individuals regarding the information that they have given as participants in a research project is a cornerstone of complying with accepted research standards. However, in longitudinal studies, establishing and maintaining privacy is often challenging because of the necessity of repeated contact with participants. A novel internet-based solution is introduced here, which maintains privacy while at the same time ensures linkage of data to individual participants in a repeated measures (...)
    Direct download (6 more)  
     
    Export citation  
     
    My bibliography  
  39.  3
    G. Miller (1973). The Inexactness of Time. Foundations of Physics 3 (3):389-398.
    The differential aging effect is shown to be valid in any physically reasonable extension of the special theory of relativity which includes a description of accelerating observers. Einstein's controversial assumption—the clock hypothesis—is avoided. Instead, it is sufficient to assume accessibility—that it is possible to travel from one inertial observer to another and then return to the first in a reasonable manner. Since Minkowski space-time displays this accessibility property, there must be an error in Sachs's quaternion development of general relativity. (...)
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography  
  40. Robert DiSalle (2009). Understanding Space-Time: The Philosophical Development of Physics From Newton to Einstein. Cambridge University Press.
    Presenting the history of space-time physics, from Newton to Einstein, as a philosophical development DiSalle reflects our increasing understanding of the connections between ideas of space and time and our physical knowledge. He suggests that philosophy's greatest impact on physics has come about, less by the influence of philosophical hypotheses, than by the philosophical analysis of concepts of space, time and motion, and the roles they play in our assumptions about physical objects and physical measurements. This (...)
    No categories
     
    Export citation  
     
    My bibliography  
  41. Robert DiSalle (2008). Understanding Space-Time: The Philosophical Development of Physics From Newton to Einstein. Cambridge University Press.
    Presenting the history of space-time physics, from Newton to Einstein, as a philosophical development DiSalle reflects our increasing understanding of the connections between ideas of space and time and our physical knowledge. He suggests that philosophy's greatest impact on physics has come about, less by the influence of philosophical hypotheses, than by the philosophical analysis of concepts of space, time and motion, and the roles they play in our assumptions about physical objects and physical measurements. This (...)
    No categories
     
    Export citation  
     
    My bibliography  
  42.  71
    Sunny Y. Auyang (1995). How is Quantum Field Theory Possible? Oxford University Press.
    Quantum field theory (QFT) combines quantum mechanics with Einstein's special theory of relativity and underlies elementary particle physics. This book presents a philosophical analysis of QFT. It is the first treatise in which the philosophies of space-time, quantum phenomena, and particle interactions are encompassed in a unified framework. Describing the physics in nontechnical terms, and schematically illustrating complex ideas, the book also serves as an introduction to fundamental physical theories. The philosophical interpretation both upholds the reality (...)
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography   21 citations  
  43. Thomas Breuer (1995). The Impossibility of Accurate State Self-Measurements. Philosophy of Science 62 (2):197-214.
    It is shown that it is impossible for an observer to distinguish all present states of a system in which he or she is contained, irrespective of whether this system is a classical or a quantum mechanical one and irrespective of whether the time evolution is deterministic or stochastic. As a corollary, this implies that it is impossible for an observer to measure the EPR-correlations between himself or herself and an outside system. Implications of the main result are discussed (...)
    Direct download (7 more)  
     
    Export citation  
     
    My bibliography   5 citations  
  44.  99
    Aephraim M. Steinberg (1998). Single-Particle Nonlocality and Conditional Measurements. Foundations of Physics 28 (3):385-397.
    I suggest that quantum mechanical nonlocality may in a certain sense allow a particle to be in two places at the same time, without violating causality. I discuss the measurable consequences of such a feat, and speculate about possible statistical tests which could distinguish this view of quantum mechanics from a “corpuscular” one. In particular, I describe some experiments being set up at Toronto which will investigate atomic tunneling, looking among other things for a signature of such alkali schizophrenia.
    Direct download (4 more)  
     
    Export citation  
     
    My bibliography  
  45.  85
    Jose G. Vargas & Douglas G. Torr (1999). The Cartan-Einstein Unification with Teleparallelism and the Discrepant Measurements of Newton's Constant G. Foundations of Physics 29 (2):145-200.
    We show that in 1929 Cartan and Einstein almost produced a theory in which the electromagnetic (EM) field constitutes the time-like 2-form part of the torsion of Finslerian teleparallel connections on pseudo-Riemannian metrics. The primitive state of the theory of these connections would not, and did not, permit Cartan and Einstein to realize how their torsion field equations contained the Maxwell system and how the Finslerian torsion contains the EM field. Cartan and Einstein discussed curvature field equations, though failing (...)
    Direct download (4 more)  
     
    Export citation  
     
    My bibliography  
  46. Peter E. Hodgson (2003). Relativity and Religion: The Abuse of Einstein's Theory. Zygon 38 (2):393-409.
    Einstein’s special theory of relativity has had a wide influence on fields far removed from physics. It has given the impression that physics has shown that there are now no absolute truths, that all beliefs are relative to the observer, and that traditional stable landmarks have been washed away. We each have our own frame of reference that is as good as any other frame, so that there are no absolute standards by which our actions may be judged. The predictions (...)
    Direct download (5 more)  
     
    Export citation  
     
    My bibliography  
  47.  17
    Mioara Mugur-Schächter (1992). Toward a Factually Induced Space-Time Quantum Logic. Foundations of Physics 22 (7):963-994.
    In the present work are identified the main features of the algebraic structure with respect to the logical operations, of the set of all the quantum mechanical utterances for which can be specified a factual counterpart and factual rules for truth valuation. This structure is found not to be a lattice. It depends crucially on the spacetime features of the operations by which the observer prepares the studied states and performs measurements on them.
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography   1 citation  
  48.  24
    J. Rayski (1979). Controversial Problems of Measurements Within Quantum Mechanics. Foundations of Physics 9 (3-4):217-236.
    It is explained why quantum mechanics applies principally to single systems and not to ensembles. A thorough analysis of thought-experiments shows clearly that irreversibility is connected with the storing of information rather than with the act of measurement. In order to avoid paradoxes one has to admit that the wave function does not represent the state of the system in itself, but information acquired in consequence of a complete measurement. The meaning of the time-energy uncertainty relation for stable systems (...)
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography  
  49.  29
    Peter Mittelstaedt (2010). On the Meaning of the Constant "C" in Modern Physics. Journal for General Philosophy of Science / Zeitschrift für Allgemeine Wissenschaftstheorie 41 (1):45 - 53.
    In modern physics, the constant "c" plays a twofold role. On the one hand, "c" is the well known velocity of light in an empty Minkowskian space—time, on the other hand "c" is a characteristic number of Special Relativity that governs the Lorentz transformation and its consequences for the measurements of space—time intervals. We ask for the interrelations between these two, at first sight different meanings of "c". The conjecture that the value of "c" has any influence (...)
    Direct download (4 more)  
     
    Export citation  
     
    My bibliography  
  50.  7
    Y. V. Kononets (2010). Charge Conservation, Klein's Paradox and the Concept of Paulions in the Dirac Electron Theory. Foundations of Physics 40 (5):545-572.
    An algebraic block-diagonalization of the Dirac Hamiltonian in a time-independent external field reveals a charge-index conservation law which forbids the physical phenomena of the Klein paradox type and guarantees a single-particle nature of the Dirac equation in strong external fields. Simultaneously, the method defines simpler quantum-mechanical objects—paulions and antipaulions, whose 2-component wave functions determine the Dirac electron states through exact operator relations. Based on algebraic symmetry, the presented theory leads to a new understanding of the Dirac equation physics, including (...)
    Direct download (3 more)  
     
    Export citation  
     
    My bibliography  
1 — 50 / 1000