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    Wyświetlanie 1-6 z 6
    Tytuł:
    Does time exist in quantum gravity?
    Autorzy:
    Kiefer, Claus
    Powiązania:
    https://bibliotekanauki.pl/articles/690788.pdf
    Data publikacji:
    2015
    Wydawca:
    Copernicus Center Press
    Tematy:
    cosmology
    arrow of time
    entropy
    quantum gravity
    Opis:
    Time is absolute in standard quantum theory and dynamical in general relativity. The combination of both theories into a theory of quantum gravity leads therefore to a “problem of time”. In my essay, I investigate those consequences for the concept of time that may be drawn without a detailed knowledge of quantum gravity. The only assumptions are the experimentally supported universality of the linear structure of quantum theory and the recovery of general relativity in the classical limit. Among the consequences are the fundamental timelessness of quantum gravity, the approximate nature of a semiclassical time, and the correlation of entropy with the size of the Universe.
    Źródło:
    Zagadnienia Filozoficzne w Nauce; 2015, 59; 7-24
    0867-8286
    2451-0602
    Pojawia się w:
    Zagadnienia Filozoficzne w Nauce
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Gauge Model for Gravity and considerations on the Asymmetry of Time and the SU (2) Mass Gap
    Autorzy:
    Kabe, Koustubh
    Powiązania:
    https://bibliotekanauki.pl/articles/1178329.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Gauge theory
    general relativity
    gravity
    loop quantum gravity
    mass gap
    quantum field theory
    quantum gravity
    string theory
    super gravity (SUGRA)
    super symmetry (SUSY)
    time
    time asymmetry
    Opis:
    A new formulation of the Hamiltonian formalism of general relativity is developed based on the adiabatic variation of the Hamiltonian constraint. This new formulation consists of complex valued anti-Hermitian 1- called the Berry gauge potentials. These are then used to develop the complex Berry-Einstein-Yang-Mills curvature 2- . The Berry-Yang-Mills field equations are then developed and interpreted in a novel manner to incorporate quantum temporal strings in the non-perturbative formalism. This is however just highlighted in this paper and will be pursued in another paper. Since, the holonomy phase construed is that of Lorentz rotation we perceive a new quantum structure of the space-time namely that of causality. The future light cones are soldered internally to the tensor fields naturally so that the Berry-Ehresmann connection defines a quantum gauge field of causality. This field evokes the causal structure attributed to space-time as gauge degrees of freedom of quantum space ― a fluid of future light cones. This symmetry being of the gauge field type has three generators i.e., three gauge bosons― all heavy and therefore attracted by gravity. Thus causality is a local gauge degree of freedom of gravity. Once the theory is developed, the problem of the mass gap is considered for our gauge field. It seems that the problem is solved in this paper.
    Źródło:
    World Scientific News; 2017, 81, 2; 198-220
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Does the quantum mechanical wave function exist?
    Autorzy:
    Kiefer, Claus
    Powiązania:
    https://bibliotekanauki.pl/articles/690936.pdf
    Data publikacji:
    2019
    Wydawca:
    Copernicus Center Press
    Tematy:
    wave function
    quantum mechanics
    ontology
    quantum formalism
    superposition principle
    measurement problem
    decoherence
    quantum gravity
    Opis:
    I address the question whether the wave function in quantum theory exists as a real (ontic) quantity or not. For this purpose, I discuss the essentials of the quantum formalism and emphasize the central role of the superposition principle. I then explain the measurement problem and discuss the process of decoherence. Finally, I address the special features that the quantization of gravity brings into the game. From all of this I conclude that the wave function really exists, that is, it is a real (ontic) feature of Nature.
    Źródło:
    Zagadnienia Filozoficzne w Nauce; 2019, 66; 111-128
    0867-8286
    2451-0602
    Pojawia się w:
    Zagadnienia Filozoficzne w Nauce
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quantum geometry, logic and probability
    Autorzy:
    Majid, Shahn
    Powiązania:
    https://bibliotekanauki.pl/articles/1047619.pdf
    Data publikacji:
    2020-12-29
    Wydawca:
    Copernicus Center Press
    Tematy:
    logic
    noncommutative geometry
    digital geometry
    quantum gravity
    duality
    power set
    Heyting algebra
    Opis:
    Quantum geometry on a discrete set means a directed graph with a weight associated to each arrow defining the quantum metric. However, these ‘lattice spacing’ weights do not have to be independent of the direction of the arrow. We use this greater freedom to give a quantum geometric interpretation of discrete Markov processes with transition probabilities as arrow weights, namely taking the diffusion form ∂+f = (−Δθ + q − p)f for the graph Laplacian Δθ, potential functions q, p built from the probabilities, and finite difference ∂+ in the time direction. Motivated by this new point of view, we introduce a ‘discrete Schrödinger process’ as ∂+ψ = ı(−Δ + V )ψ for the Laplacian associated to a bimodule connection such that the discrete evolution is unitary. We solve this explicitly for the 2-state graph, finding a 1-parameter family of such connections and an induced ‘generalised Markov process’ for f = |ψ|2 in which there is an additional source current built from ψ. We also mention our recent work on the quantum geometry of logic in ‘digital’ form over the field F2 = {0, 1}, including de Morgan duality and its possible generalisations.
    Źródło:
    Zagadnienia Filozoficzne w Nauce; 2020, 69; 191-236
    0867-8286
    2451-0602
    Pojawia się w:
    Zagadnienia Filozoficzne w Nauce
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Is Time Inhomogeneous ?
    Autorzy:
    Sadatian, S. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/412482.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    quantum gravity
    Lorentz Invariance
    symmetry breaking
    varying speed of light
    fractal mathematics
    Opis:
    In this article, we discuss probability of inhomogeneous time in high or low energy scale of physics. Consequently, the possibility was investigated of using theories such as varying speed of light (VSL) and fractal mathematics to build a framework within which answers can be found to some of standard cosmological problems and physics theories on the basis of time non-homogeneity.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 13, 2; 155-159
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Filozofia przyrody jako sito
    Autorzy:
    Czerniawski, Jan
    Powiązania:
    https://bibliotekanauki.pl/articles/2013472.pdf
    Data publikacji:
    2006
    Wydawca:
    Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
    Tematy:
    filozofia przyrody
    nauki przyrodnicze
    interpretacja
    dialog interdyscyplinarny
    filozofia w nauce
    rewolucja kwantowo-relatywistyczna
    kwantowa grawitacja
    philosophy of nature
    natural sciences
    interpretation
    interdisciplinary dialogue
    philosophy in science
    quantum-relativity revolution
    quantum gravity
    Źródło:
    Roczniki Filozoficzne; 2006, 54, 1; 299-302
    0035-7685
    Pojawia się w:
    Roczniki Filozoficzne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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