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Wyświetlanie 1-15 z 17
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:
Introduce of Generalized Uncertainty Principle
Autorzy:
Sadatian, S. D.
Powiązania:
https://bibliotekanauki.pl/articles/412014.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Quantum Gravity
Uncertainty principle
Symmetry Breaking
Poincare alghebra
Opis:
We study and explain the uncertainty principle. We've discussed how to reform the uncertainty principle. In this regards, we have used the mechanisms of noncommutative algebra for obtain a generalized uncertainty principle. Following, Due to modified relationship uncertainty, we consider some application of these relation.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 20, 1; 10-20
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kosmologia klasyczna a kosmologia kwantowa
The Problems Of Classical Cosmology Motivation For The Quantum Gravity Theory
Autorzy:
Golbiak, Jacek
Szydłowski, Marek
Powiązania:
https://bibliotekanauki.pl/articles/909932.pdf
Data publikacji:
2005-09-01
Wydawca:
Uniwersytet Warszawski. Wydział Filozofii
Tematy:
loop quantum gravity
methodological issues
relativistic cosmology problems
Opis:
In this paper it is investigated the standard problems of relativistic cosmology like: singularity problem, flatness problem, horizon problem, acceleration problem and problem of structure origin. We discuss nature of these difficulties and we suggest existence of some analogies to the problems of Newtonian cosmology. We argue that the existence of serious problems of relativistic cosmology is strictly related with our understanding of space-time. The overcome of these problems means the exit beyond the standard model. We pointed out that the loop quantum gravity seems to be correct step toward to overcome problems of relativistic cosmology.
Źródło:
Filozofia Nauki; 2005, 13, 3; 39-55
1230-6894
2657-5868
Pojawia się w:
Filozofia Nauki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Actual picture of the law of universal gravitation and the quantum gravity theory describing the real state of the universe
Autorzy:
Borowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/412595.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
classical gravity theory
quantum gravity theory
dark matter
Copernicus
Newton
Opis:
This paper presents the real sense of the classical and quantum theory of gravitation as a component of the actual picture of the universe where the volume, as the size of the expanding universe, approaches infinity, while the total of material masses goes to zero. At present, these two standard theories describe the phenomenon of gravitation but do not explain the very mechanism and the cause of this process. This constant and real lack of information on that subject is consistent with natural laws and the same with the laws of physics, which were already experimentally determined by Werner Heisenberg in 1927. The paper also presents the causes of inability to explain up to the present the actual picture of the essence of the universe.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 11; 44-53
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
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:
Some Details of Statistical Mechanics of Many-Body Systems in the Presence of a Measurable Minimal Length
Autorzy:
Alizadeh, A.
Nozari, K.
Powiązania:
https://bibliotekanauki.pl/articles/1032577.pdf
Data publikacji:
2017-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
quantum gravity phenomenology
statistical physics
many-body systems
minimal measurable length
Opis:
Different approaches to quantum gravity proposal such as string theory, doubly special relativity, and also black holes physics, all commonly address the existence of a minimal measurable length of the order of the Planck length. One way to apply the minimal length is changing the Heisenberg algebra in the phase space which is known as the generalized uncertainty principle. It is essential to apply this feature on the statistical mechanics of many body systems in the presence of a measurable minimal length scale in order to see the roles of this natural cutoff on physical phenomena. In this paper, some details of statistical mechanics of many body systems that have not been studied carefully in literature are studied in the presence of minimal length scale. The issues such as isomerization, the Liouville theorem, virial theorem and equipartition theorem are studied in this setup with details and the results are explained thoroughly.
Źródło:
Acta Physica Polonica A; 2017, 132, 4; 1329-1332
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Condensed Geometry II: New Constraints, Temporal Confinement Phase and Structure and Interpretation of Space and Time
Autorzy:
Kabe, Koustubh
Powiązania:
https://bibliotekanauki.pl/articles/1190218.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Ashtekar variables
Loop Quantum Gravity
surface states
phase transitions
string theory
Opis:
In this paper we basically intend to deductively study aspects and physical behavior of time in the Quantum Mechanical and Loop Quantum Gravity regime and the physical interpretations therein. The implicit gauge invariance of the vortical time is deduced. A new form of the Hamiltonian constraint is produced and the corresponding Vector or Diffeomorphism constraint is also introduced, the Gauss constraint being found to be the same as that in the original. The new consequences are discussed. The paper presents fresh new ideas and interpretations as well as perspectives on the spatial as well as the now introduced temporal aspects of Loop Quantum Gravity. In this we basically intend to deductively study aspects and physical behavior of Time in the Quantum Mechanical and Loop quantum gravity regime and the physical interpretations therein. In what follows, we provide a systematic mathematico-physical treatment of the vortical aspect of quantum gravity or a test quantum system, relative to space, as the time for that system. The implicit gauge invariance of the vortical time is deduced. A general theory of implicit and explicit gauge invariance is proposed. The gauging out of the acausality gauge degree of freedom is deduced and the causal direction of time is shown to nucleate out as a self ordered criticality due to a “tweaking” field which is shown to be a form of magnetic phase transition. This magnetic phase arising in the Kodama holomorphic wave functional universe, arises naturally due to the Ashtekar “magnetic” field in general. Also the wave-particle duality of gravity/ geometry as a quantum system is interpreted in terms of the physical role played by time. The long standing problem of the interpretation of the quantum mechanical time-inverse temperature has apriori been resolved with a heuristic interpretation. As an epilogue, the Pauli theorem on time as an operator has been discussed along with the standard proof.
Źródło:
World Scientific News; 2016, 44; 236-256
2392-2192
Pojawia się w:
World Scientific News
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:
Hamilton-Jacobi/ Canonical Phase Transitions of Ashtekar LQG-Polyakov Strings: World Sheet Dynamics as Regelation through the d = 3 + 1 Spacetime
Autorzy:
Kabe, Koustubh
Powiązania:
https://bibliotekanauki.pl/articles/1179195.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Ashtekar connectio-dynamics
Loop Quantum Gravity
Nambu-Goto action
Polyakov path integral
phase transitions
string theory
Opis:
The following paper takes up an Ashtekar connectio-dynamics and algebraic quantum field theoretic treatment of a relativistic quantum string without SUSY and hence in four spacetime dimensions treats the Polyakov dynamics of a relativistic quantum string given explicitly by the Polyakov path integral in terms of a “canonical” phase transition where the string is imagined as a thread regelating through the “ice cube” of spacetime.
Źródło:
World Scientific News; 2017, 83; 206-211
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Fundamental Holographic Uncertainty Principle and its Primary Applications
Autorzy:
Kabe, Koustubh
Powiązania:
https://bibliotekanauki.pl/articles/1191787.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
holographic principle
holographic uncertainty principle
Heisenberg uncertainty principle
Landauer’s Principle
blackhole entropy
loop quantum gravity
area operator
quantum geometry
general relativity
corrected blackhole horizon
Opis:
The fundamental holographic principle is first proposed, then demonstrated in its validity and viability through a thought experiment and then finally derived. The Heisenberg uncertainty relations are shown to follow from this fundamental relation. The quantum blackhole entropy is then demonstrated using this holographic uncertainty relation along with the application of the Landauer’s principle for the thermodynamic erasure of a bit yielding a formula with a logarithmic correction. The blackhole entropy is found to be half the value normally delivered by any other method. So, it is proposed that there is a real relevant physical horizon at the twice the Schwarzschild radius dubbed the holographic information geometric horizon.
Źródło:
World Scientific News; 2016, 50; 33-48
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Granice fizyki w kosmologii
Limits of physics in cosmology
Autorzy:
Sokołowski, Leszek M.
Powiązania:
https://bibliotekanauki.pl/articles/690790.pdf
Data publikacji:
2015
Wydawca:
Copernicus Center Press
Tematy:
physical cosmology
the notion of the Universe
dark matter and dark energy
falsifiability of quantum gravity
origin of the Universe
Opis:
The message is that physics has an „outward bound” of scientific inquiry in the field of cosmology. I present it in the historical development. Physics and astronomy, developing since the seventeenth century, inherited from the early Greek philosophers the conception that the Universe as a whole is invariable. In nineteenth century this conception in conjunction with the conception of eternity of the Universe (being a philosophical conclusion from the conservation laws of mass and energy) gave rise to contradictions with other laws of physics indicating that cosmology is not a branch of physics since the notion of the Universe is not a physical one. Cosmology returned to physics as its important branch due to the advent of general relativity theory and the discovery of the cosmic microwave background radiation. Modern cosmology generates fundamental problems creating real limits to inquiries in physics viewed as an empirical science. The very notion of the Universe shows that the scientific method reaches there limits of its applicability. Does „to exist” mean „to be observed by someone”? Should the definition of the Universe be based on a current physical theory, e.g. on Einstein’s general relativity, giving rise to a kind of mathematical instability? Is the fashionable concept of the „multiverse” a physical one or is a purely metaphysical notion in a scientific disguise? If the Universe is unique (as we believe), is it meaningful to describe it in the framework of physics, which by its method always assumes that the number of objects it describes, is unlimited? Apart from these permanent philosophical problems there are concrete urgent problems generated by cosmology: the nature of dark matter and dark energy. These two species of „substance” appear only in cosmology and do not fit the laboratory physics; contrary to the three centuries long tradition of modern science, now cosmology inspires physics in a troublesome way. A separate class of limits to physics is generated by the theorem in general relativity that the Universe emerged from an initial curvature singularity of the spacetime. At the singularity the whole scientific inquiry breaks down. Cosmology of the very early Universe suggests that in its evolution two specific epochs took place, that of quantum gravity and an inflationary epoch. The underlying them two physical theories are incomplete and seem to be inherently untestable. Furthermore, the experimentally verifiable physics cannot explain the origin of the initial conditions determining properties of the Universe which emerged from the singularity.
Źródło:
Zagadnienia Filozoficzne w Nauce; 2015, 59; 25-81
0867-8286
2451-0602
Pojawia się w:
Zagadnienia Filozoficzne w Nauce
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
Tytuł:
Antygrawitacja i siła bezwładności w dzwonie z kompleksu „Riese”
Anti-gravity and inertial force in the bell of the “Riese” complex
Autorzy:
Piesiak, S.
Grzywa, K.
Jarguliński, W.
Powiązania:
https://bibliotekanauki.pl/articles/131381.pdf
Data publikacji:
2017
Wydawca:
Uczelnia Jana Wyżykowskiego
Tematy:
antymateria
antygrawitacja
kwantowa teoria grawitacji
siła odśrodkowa
antimatter
anti-gravitation
quantum theory of gravity
centrifugal force
Opis:
Inspirację autorów stanowią badania podjęte nad kompleksem „Riese”, który Niemcy budowali w czasie wojny w Górach Sowich. W niniejszej pracy zajmiemy się tzw. dzwonem z wirującymi w nim przeciwstawnie dwiema tarczami. Pomysłodawcy tego rozwiązania uważali, że dużą siłę pionową skierowaną do góry daje antygrawitacja, którą wytworzyły w dzwonie dwie wirujące z dużą prędkością i przeciwbieżnie tarcze. Inspiracją są najnowsze badania japońskie z 1989 r., eksperymentalnie sprawdzające prace niemieckie. Badacze japońscy uzyskali znaczące wartości siły pionowej do góry. Uważamy, że nie tylko antygrawitacja daje pionową siłę unoszącą niemieckie spodki do góry, ale także składowa pionowa odśrodkowych sił bezwładności mas wirujących.
The researches undertaken in the complex “Riese”, which was built by the Germans during the war in the Sowie Mountains, have been the inspiration for the article. In the following work we will take a look at so called bell with two, counter-rotating discs. The originators of this solutions thought that a great vertical power up is caused by anti-gravitation, which was created by the discs that counter-rotate at a high speed. The inspiration was the latest Japanese research of 1989 that experimentally examined the German works. The Japanese researchers obtained considerable values of the vertical power in the upper direction. We think that, not only is the anti-gravitation the source of the vertical power in the upper direction that can lift the German saucers but also constitutes the vertical centrifugal inertial force of the rotating masses.
Źródło:
Zeszyty Naukowe Uczelni Jana Wyżykowskiego. Studia z Nauk Technicznych; 2017, 6; 149-158
2543-6740
Pojawia się w:
Zeszyty Naukowe Uczelni Jana Wyżykowskiego. Studia z Nauk Technicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 17

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