The reader is brought to the frontiers of current cosmological research by the discussion of more speculative ideas. Citeseerx document details isaac councill, lee giles, pradeep teregowda. Unfortunately, the national bureau of standards has not gotten around to establishing a standard notation for cosmological equations. Bohms potential, classicalquantum duality and repulsive. Recently, some authors removed the bigbang singularity and predicted an infinite age of our universe. It is based on modern fundamental physics, astronomy and employs a variety of mathematical methods. In this paper we discuss the quantum potential approach of bohm in the context of quantum cosmological model. Consequences of quantum gravity on grander scales are expected to be enormous. General relativity and quantum cosmology authorstitles. The propagation of a particle in a variable potential is formally equiva. This is a course on cosmology, aimed at final year undergraduate students. Quantum cosmology is the attempt in theoretical physics to develop a quantum theory of the universe.
This initial singularity is, however, not physical since general relativity fails for t. Citeseerx quantum potential approach to quantum cosmology. Introduction to standard bigbang model the observed expansion of the universe 1,2,3 is a natural almost inevitable result of. General relativity and quantum cosmology, astrophysics cosmology and nongalactic astrophysics, high energy physics theory year. Abstract in this paper we discuss the quantum potential approach of bohm in the context of quantum cosmological model. This is an ideal textbook both for advanced students of physics and astrophysics and for those with a particular interest in theoretical cosmology. In this article we derive the second order friedmann equations from the qre, and show that this also contains a couple of quantum correction terms, the first of which can be interpreted as cosmological constant and gives a correct estimate of its observed value, while the second as a radiation term in the early universe, which gets rid of the. Cosmology from quantum potential pvmhs chemistry 1h 1415. This paper studies the twospinor form of the raritaschwinger potentials subject to local boundary conditions compatible with local supersymmetry. Thus, from now on, we will refer our analysis only at the level of the minisuperspace kantowskisachs variables and their quantum evolution. Minimal length effects on quantum cosmology and quantum.
The fundamental role of bohms quantum potential in the treatment of gravity and thus in the generalrelativistic domain has been explored by various authors see, for example, the book of r. Cosmology from quantum potential in braneantibrane system sepehri, alireza. By this one means exchanging bohms quantum potential for the classical potential. This also brings out the essential quantum origin of the small cosmological constant. This approach makes it possible not only to identify trajectories associated with wav e function of. In physical cosmology, cosmic inflation, cosmological inflation, or just inflation, is a theory of exponential expansion of space in the early universe. Classical and quantum exact solutions for a frw multiscalar.
Classical and quantum exact solutions for a frw multiscalar field cosmology with an exponential potential driven inflation j. Please do email me if you find any typos or mistakes. Then, d0branes join each other, grow and form a sixdimensional. This course provides an overview of astrophysical cosmology with emphasis on the cosmic microwave background cmb radiation, galaxies and related phenomena at high redshift, and cosmic structure formation.
In the bohmde broglie interpretation description, the quantum potential becomes important near the singularity, yielding a repulsive quantum force counteracting. Following the inflationary period, the universe continued to expand, but. Pdf it was shown recently that replacing classical geodesics with quantal bohmian trajectories gives rise to a quantum corrected. Furthermore, we show that the approach of using a quantum corrected raychaudhuri equation qre, as. Basic assumptions made in the construction of cosmological models. Pdf quantum cosmology download full pdf book download. A cosmology calculator for the world wide web in pdf light from galaxy clusters confirm general theory of relativity in pdf dark cosmology centre, niels bohr institute did the universe have a beginning. The massless raritaschwinger field equations are studied in fourrealdimensional riemannian.
A philosophy of the selfs potential through quantum cosmology, explores and correlates these seemingly diverse and unrelated topics, deftly interweaving them into a rich tapestry of philosophical thought. Bohmian trajectories gives rise to a quantum corrected raychaudhuri equation qre. Cosmology from quantum potential ahmed farag ali 1,2. Posts about cosmology from quantum potential written by jonathan silcox. Here we focus our attention on a very interesting recent research of a. We present the full version of this ebook in txt, epub, doc, djvu, pdf forms. This provides perhaps the greatest potential in terms of falsi able predictions. Quantum potential approach to quantum cosmology arkadiusz b laut and jerzy kowalski glikmany institute for theoretical physics university of wroc law pl. This is a very broad and rapidly developing science.
It assumes a background in neither general relativity nor statistical mechanics. Apr 11, 2014 it was shown recently that replacing classical geodesics with quantal bohmian trajectories gives rise to a quantum corrected raychaudhuri equation qre. Structure formation may be described in quantum cosmology by introducing quantum perturbations about a semiclassical spatially homogeneous and isotropic background. Cosmology from quantum potential by george shiber posted on tuesday, april 25, 2017 wednesday, april 26, 2017 in no tags cosmology from quantum potential. Cosmology from quantum potential in braneantibrane system. The lattice approach seems to me most promising to getting a bohmian standard model why. Additional topics include cosmic inflation, nucleosynthesis and baryosynthesis, quasar qso absorption lines, and gammaray bursts. Cosmology from quantum potential posted jun 14, 2015, 12. This approach makes it possible to convert the wavefunction of the universe to a set of equations describing the time evolution of the universe.
Pdf raritaschwinger potentials in quantum cosmology. If the potential energy density of this eld happens to be quite. This approach attempts to answer open questions of classical physical cosmology, particularly those related to the first phases of the universe. This belief is based on studies of socalled loop quantum cosmology which concerns. They combine, remarkably, when in the very early universe the entire universe was far smaller than the smallest particle. Cosmology from quantum potential in braneantibrane. Special and general relativity atomic and condensed matter nuclear and particle physics beyond the standard model cosmology astronomy and astrophysics other physics topics. On the correctness of cosmology from quantum potential. A flat friedmannrobertsonwalker frw multiscalar field cosmology is studied with a particular potential of the form, which emerges as a relation between the time derivatives of the scalars field momenta. We examine in detail the cosmology based on quantal bohmian trajectories as suggested in a recent study a. General relativity and quantum cosmology grqc tue, 19 may 2020 showing first 10 of 34 entries 41 arxiv.
Using quantum psychics applied to einsteins theory of general relative the physicists have created a new model of the universe that. Observations in cosmology how the models really work. Cosmology is the science about the structure and evolution of the universe on the large scale, its past, present and future. In our mechanism, first, n fundamental string decay to n d0antid0brane. I wholeheartedly believe a number of their interpretations in the paper are correct. Classical physics quantum physics quantum interpretations. This means that although it is a physical science, it is of particular importance in terms of its implications for human life. This approach attempts to answer open questions of classical physical cosmology, particularly those related to the first phases of the universe the classical cosmology is based on albert einsteins general theory of relativity gtr or simply gr which describes the evolution of the universe. Cosmology deals with the physical situation that is the context in the large for human existence. They are both not up on current developments, this and aephraim steinbergs experiments in. It was shown recently that replacing classical geodesics with quantal bohmian trajectories gives rise to a quantum corrected raychaudhuri. It seems that every cosmology book has its own notation. Despite some remarkable interesting features of the theory. In this article we derive the second order friedmann equations from the qre, and show that this also contains a.
To ray chiao so much for ruth kastners and jenny nielsens rejection of bohmian trajectories on the deepak chopra curious minds videos. Applications of loop quantum gravity to cosmology have especially by now shed much light on cosmic evolution of a universe in a fundamental, microscopic description. The human search for meaning in the universe quantum consciousness. Loop quantum cosmology and singularities scientific reports. In this paper, we show that the same result can be obtained in string theory and mtheory. One may also be tempted to interpret the quantum potential term as a perfect fluid with w q. In this article we derive the second order friedmann equations from the qre, and show that this also contains a couple of quantum correction terms, the first of which can. Furthermore, we show that the approach of using a quantum corrected raychaudhuri equation qre, as suggested in a. On the correctness of cosmology from quantum potential nasaads. Hence i could not count on much familiarity with quantum mechanics, general relativity, particle physics, astrophysics or statistical mechanics. The time problem in cosmology from quantum potential. In this article we derive the second order friedmann equations from the qre, and show that this also contains a couple of quantum correction terms, the first of which can be interpreted as cosmological constant and gives a correct estimate. Cosmology, quantum vacuum and zeta functions invites the reader to think positively, if you ever find yourself in a bad condition, remember that even if you can lose everything else, your work, your property, your money and even your health knowledge can never be removed from you. In passing we should mention that of the many articles surveyed in the literature pertaining the role of bohms quantum potential and cosmology, 14, 15, 16 we did not find any related to the.
The time problem in cosmology from quantum potential milliern. Carroll fluctuations, information, gravity and the quantum potential. Cosmology with bohm quantum potential and trajectories. The generally accepted view of our universe homogeneous, isotropic, spatially flat, obeying general relativity, and currently consisting of about 72 % dark energy, likely in the form of a cosmological constant. Aug 15, 2017 loop quantum gravity is believed to eliminate singularities such as the big bang and big crunch singularity. Loop quantum gravity is believed to eliminate singularities such as the big bang and big crunch singularity. Abriefintroductioninto quantum gravity and quantum. Classically, by employing the hamiltonian formalism of two scalar fields with standard kinetic energy, exact solutions are found for the einsteinkleingordon ekg system for.
On the correctness of cosmology from quantum potential modern. Pdf quantum potential approach to quantum cosmology. This leads to important issues about the explanatory scope of. Maxa borna 9, pl50205 wroc law, poland july 5, 1995 abstract in this paper we discuss the quantum potential approach of bohm in the context of quantum cosmological model. Introduction to big bang cosmology our present understanding of the universe is based upon the successful hot big bang theory, which explains its evolution from the. The models turn out to be remarkably successful, but we need to ask how secure these foundations are. Uniqueness and energy bounds for static ads metrics. In this article we present a new outlook on the cosmology, based on the quantum.
A spectrum for such anisotropies may be predicted for both boundary proposals. We disagree with the conclusions regarding predicting the value of the cosmological constant. Due to the temperatures involved all quantum cosmology is theoretical and highly speculative. Feb 11, 2015 so i think the only hope is that it is fully quantum, and then quantum gravity effects remove the singularity, like in some loop quantum cosmology models. Apr 25, 2017 cosmology from quantum potential by george shiber posted on tuesday, april 25, 2017 wednesday, april 26, 2017 in no tags cosmology from quantum potential.
Pdf in this paper we discuss the quantum potential approach of bohm in the context of quantum cosmological model. The minisuperspace coordinates, at the present quantum stage, are not affected by their classical dependence on the time t or the radius r 38. Therefore the lord blessed the sabbath day and made it holy. It was shown recently that replacing classical geodesics with quantal bohmian trajectories gives rise to a quantum corrected raychaudhuri equation qre. This unification, it is theorised, occurred from the big bang to some 1043 seconds after the big bang. In passing we should mention that of the many articles surveyed in the literature pertaining the role of bohms quantum potential and. The quantum potential in gravity and cosmology springerlink. This belief is based on studies of socalled loop quantum cosmology.
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