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Relativistic quantum information theory and quantum reference frames
Relativistic quantum information theory and quantum reference frames

... phenomena where both quantum and gravitational effects are important. There is research into developing a fundamentally new theory that will combine the phenomena and experimental predictions from both of these existing theories: a theory of quantum gravity. This would be a theory of microscopic mat ...
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Physics through Extra Dimensions: On Dualities, Unification, and Pair Production

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A unification of photons, electrons, and gravitons under qbit

... Seven basic assumptions • The current physical theory explain a very wide range of phenomena from some simple “starting points”. It unifies everything into seven fundamental assumptions – seven wonders of our universe: (1) Locality. (2) Identical particles. (3) Gauge interactions. (4) Fermi statist ...
decoupling limit
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Modelling the electron and hole states in semiconductor
Modelling the electron and hole states in semiconductor

... field and mechanical strain are modelled in the k · p theory. When applied to nanostructures, the multiband k · p theory could give rise to spurious solutions, which are an artifact due to an incomplete description of the electronic structure by the k · p theory. In practice, spurious solutions are ...
Probability in Everettian quantum mechanics - Philsci
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... Quantum Gravity (or something else (e.g. SUGRA)) may lead at low-energies (below Plnack scale or a scale M*) to a term in the effective Lagrangian (in curved back space-time backgrounds): ...
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silicon in the quantum limit: quantum computing

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The AdS/CMT manual for plumbers and electricians

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Shining Light on Modifications of Gravity

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The Complete Idiot``s Guide to String Theory

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On Quantum Simulators and Adiabatic Quantum Algorithms

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talk_pacific - University of Kentucky

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Part I: Understanding String Theory

... world and how this has led to the development of string theory. 1.2 Purpose and structure As such, this paper will be divided into two distinct parts. The first will both motivate and explain string theory by examining concepts from physics that has been significant to its development, as well as il ...
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Quantum Field Theory - Uwe

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Anticipating New Physics at the LHC

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Beyond Standard Model Physics

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K - Research

... papers and was considered, at least among those concerned with wave mechanics, to be the correct and natural generalization of SCHRODINGER's theory. Appearing in a beautiful symmetric manner, which automatically secures LORENTZ invariance, it appealed instinctively to many theoretical physicists. SC ...
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Quantum gravity



Quantum gravity (QG) is a field of theoretical physics that seeks to describe the force of gravity according to the principles of quantum mechanics.The current understanding of gravity is based on Albert Einstein's general theory of relativity, which is formulated within the framework of classical physics. On the other hand, the nongravitational forces are described within the framework of quantum mechanics, a radically different formalism for describing physical phenomena based on probability. The necessity of a quantum mechanical description of gravity follows from the fact that one cannot consistently couple a classical system to a quantum one.Although a quantum theory of gravity is needed in order to reconcile general relativity with the principles of quantum mechanics, difficulties arise when one attempts to apply the usual prescriptions of quantum field theory to the force of gravity. From a technical point of view, the problem is that the theory one gets in this way is not renormalizable and therefore cannot be used to make meaningful physical predictions. As a result, theorists have taken up more radical approaches to the problem of quantum gravity, the most popular approaches being string theory and loop quantum gravity. A recent development is the theory of causal fermion systems which gives quantum mechanics, general relativity, and quantum field theory as limiting cases.Strictly speaking, the aim of quantum gravity is only to describe the quantum behavior of the gravitational field and should not be confused with the objective of unifying all fundamental interactions into a single mathematical framework. While any substantial improvement into the present understanding of gravity would aid further work towards unification, study of quantum gravity is a field in it's own right with various branches having different approaches to unification. Although some quantum gravity theories, such as string theory, try to unify gravity with the other fundamental forces, others, such as loop quantum gravity, make no such attempt; instead, they make an effort to quantize the gravitational field while it is kept separate from the other forces. A theory of quantum gravity that is also a grand unification of all known interactions is sometimes referred to as a theory of everything (TOE).One of the difficulties of quantum gravity is that quantum gravitational effects are only expected to become apparent near the Planck scale, a scale far smaller in distance (equivalently, far larger in energy) than what is currently accessible at high energy particle accelerators. As a result, quantum gravity is a mainly theoretical enterprise, although there are speculations about how quantum gravity effects might be observed in existing experiments.
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