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Books > Science & Mathematics > Physics > Quantum physics (quantum mechanics)
The author has shown that practically all our laws, principles, and
theories are not physically realizable, since they were derived
from an empty space paradigm. From which this book is started with
the origin of our temporal (t > 0) universe, it shows that
temporal subspace is a physically realizable space within our
universe. As in contrasted with generally accepted paradigm where
time is an independent variable. From which the author has shown
that it is not how rigorous mathematics is, but it is the temporal
(t > 0) space paradigm determines the physically realizable
solution. Although Einstein's relativity and Schroedinger's
principle had revolutionized the modern science, this book has
shown that both theory and principle are physically non-realizable
since they were developed from an empty space paradigm. One of the
most important contribution of this book must be the revolutionary
idea of our temporal (t > 0) space, for which the author has
shown that absolute certainty exists only at the present (t = 0)
moment. Where past-time information has no physical substance and
future-time represents a physically realizable yet uncertainty.
From which the author has shown that all the existent laws,
principles, and theories were based on past-time certainties to
predict the future, but science is supposed to be approximated. The
author has also shown that this is precisely our theoretical
science was developed. But time independent laws and principles are
not existed within our temporal universe, in view of the author's
temporal exclusive principle. By which the author has noted that
timeless science has already created a worldwide conspiracy for
examples such as superposition principle, qubit information,
relativity theory, wormhole travelling and many others. This book
has also shown that Heisenberg's uncertainty is an observational
principle independent with time, yet within our universe everything
changes with time. In this book the author has also noted that
micro space behaviors the same as macro space regardless of the
particle size. Finally, one of interesting feature is that, that
big bang creation was ignited by a self-induced gravitational force
instead by time as commonly believed. Nevertheless, everything has
a price to pay; a section of time t and an amount of energy E and
it is not free. The author has also shown that time is the only
variable that cannot be changed. Although we can squeeze a section
of time t as small as we wish but we can never able to squeeze t to
zero even we have all the needed energy. Nevertheless, this
revolutionary book closer to the truth is highly recommended to
every scientist and engineer, otherwise we will forever be trapped
within the timeless fantasyland of science. This book is intended
for cosmologists, particle physicists, astrophysicists, quantum
physicists, computer scientists, optical scientists, communication
engineers, professors, and students as a reference or a
research-oriented book.
This book covers a range of new research on computational quantum
chemistry, along with a special section devoted to exotic carbon
allotropes and spiro quantum theory. The section on spiro quantum
theory covers the technical presentation of the ideas surrounding
the emergence of a synthetic, analytical, and theoretical spiro
quantum chemistry edifice, as well as a chemical topology scheme
that successfully describes molecules and patterns, including the
hydrocarbons and allotropes of carbon. The second part of the book
covers a range of new research on computational quantum chemistry.
The results of renormalized perturbation theory, in QCD and other
quantum field theories, are ambiguous at any finite order, due to
renormalization-scheme dependence. The perturbative results depend
upon extraneous scheme variables, including the renormalization
scale, that the exact result cannot depend on. Such 'non-invariant
approximations' occur in many other areas of physics, too. The
sensible strategy is to find where the approximant is stationary
under small variations of the extraneous variables. This general
principle is explained and illustrated with various examples. Also
dimensional transmutation, RG equations, the essence of
renormalization and the origin of its ambiguities are explained in
simple terms, assuming little or no background in quantum field
theory. The minimal-sensitivity approach leads to 'optimized
perturbation theory,' which is developed in detail. Applications to
Re+e-, the infrared limit, and to the optimization of factorized
quantities, are also discussed thoroughly.
This book focuses on recent topics of quantum science in both
physics and chemistry. Until now, quantum science has not been
fully discussed from the interdisciplinary vantage points of both
physics and chemistry. This book, however, is written not only for
theoretical physicists and chemists, but also for experimentalists
in the fields of physical chemistry and condensed matter physics,
as collaboration and interplay between construction of quantum
theory, and experimentation has become more important. Tips for
starting new types of research projects will be found in an
understanding of cutting-edge quantum science. In Part I, quantum
electronic structures are explained in cases of strongly correlated
copper oxides and heavy elements. In Part II, quantum molecular
dynamics is investigated by computational approaches and molecular
beam experiments. In Part III, after lithium problem in big bang
nucleosynthesis scenario is considered using supersymmetric
standard model, quantum theories in atomic and molecular systems
are reviewed. Finally, in Part IV, the development of quantum
computational method is introduced.
Gets right to the point with step-by-step guidance on solving
physics problems. Covers all topics in standard general physics
courses in the same sequence. Keeps learning about physics fun and
engaging through the story of dinosaurs being tested on their
knowledge for a final challenge (deflecting an asteroid headed to
Earth!). Enables the reader to quickly flip through and locate
steps needed for a particular problem. Includes tons of easy to
follow diagrams and worked solutions.
During the last thirty years a great advancement in low energy
physics, particularly interactions of atoms with the
electromagnetic field, has been achieved and the development of
electronics and laser techniques has allowed to implement a fine
manipulation of atoms with photons. A wealth of important
applications has sprung out from the ability of manipulating large
samples of cold atoms. Among them, the improvement of atomic clocks
and the creation of atomic gyroscopes and of atomic gravity meters,
which is obviously of great interest for geodesists and
geophysicists, particularly for potential applications in satellite
geodesy. This book explains the fundamental concepts necessary to
understand atom manipulation by photons, including the principles
of quantum mechanics. It is conceived as a road that leads the
reader from classical physics (mechanics and electromagnetism,
considered as a common scientific background of geodesists and
geophysicists), to the basics of quantum mechanics in order to
understand the dynamics of atoms falling in the gravity field,
while interacting with suitably resonant laser beams. There are
different types of measurements of gravity based on the
manipulation of ultra-cold atoms; the book presents the principles
of the instruments based on stimulated Raman transition, which can
be easily worked out analytically. However, the concepts explained
in the text can provide a good starting point to understand also
the applications based on the so-called Block oscillations or on
the Bose-Einstein condensation.
Many technological applications exploit a variety of magnetic
structures, or magnetic phases, to produce and optimise solid-state
functionality. However, most research advances are restricted to a
reduced number of phases owing to computational and resource
constraints. This thesis presents an ab-initio theory to
efficiently describe complex magnetic phases and their
temperature-dependent properties. The central assumption is that
magnetic phases evolve slowly compared with the underlying
electronic structure from which they emerge. By describing how the
electronic structure adapts to the type and extent of magnetic
order, a theory able to describe multi-spin correlations and their
effect on the magnetism at finite temperature is obtained. It is
shown that multi-spin correlations are behind the temperature and
magnetic field dependence of the diverse magnetism in the heavy
rare earth elements. Magnetically frustrated Mn-based materials and
the effect of strain are also investigated. These studies
demonstrate that the performance of solid-state refrigeration can
be enhanced by multi-spin effects.
In the last several decades, the quantum Hall effect has provided a
remarkable platform for manipulating one-dimensional electronic
modes and investigating fundamental physical phenomena. However,
certain limitations make it difficult for various kinds of
interesting modes structures to be formed using this platform. One
example is the so called helical mode structure, in which two
one-dimensional, counter propagating modes have opposite spins and
thus spin and momentum are locked. Such helical modes have lately
attracted significant interest, since, when coupled to a
conventional superconductor, they are expected to manifest
topological superconductivity and host Majorana zero modes. Even
more interesting are fractional helical modes, which open the way
for realizing generalized parafermionic zero modes. Possessing
non-abelian exchange statistics, these quasiparticles may serve as
building blocks in topological quantum computing. Here we present a
new platform for manipulating integer and fractional quantum Hall
edge modes, which allows the formation of robust one-dimensional
helical as well as fractional helical modes. The platform is based
on a carefully designed double-quantum-well structure in a GaAs
based system hosting two electronic sub-bands in the quantum Hall
effect regime. By electrostatic gating of different areas of the
structure, counter-propagating integer, as well as fractional, edge
modes with opposite spins are formed and their spin protection is
verified. Beyond the formation of helical modes, the new platform
can serve as a rich playground for new research. Some new
possibilities include the artificial induction of compounded
fractional edge modes and the construction of new edge mode-based
interferometers.
Quantum states of atoms and molecules The translational symmetry
and quantum states in periodic and amorphous solids Band structure
and tuning Classical and quantum statistics with applications to
ideal gases (photons, phonons and electrons, molecules) Quantum
states in type-I and type-II superconductors (elementary theory
included) Magnetic materials, materials with GMR and CMR Shape
memory effects in alloys and materials 2D materials (graphene and
graphene analogus) NLO and photovoltaic materials Hydrogen storage
material for mitigating the looming energy crisis Quantum states in
low and high band gap semiconductors Semimetals Designer materials,
etc.
Magnetic and spintronic materials are ubiquitous in modern
technological applications, e.g. in electric motors, power
generators, sensors and actuators, not to mention information
storage and processing. Medical technology has also greatly
benefited from magnetic materials - especially magnetic
nanoparticles - for therapy and diagnostics methods. All of the
above-mentioned applications rely on the properties of the
materials used. These properties in turn depend on intrinsic and
extrinsic material parameters. The former are related to the actual
elements used and their properties, e.g. atomic magnetic moment and
exchange interaction between atoms; the latter are related to the
structural and microstructural properties of the materials used,
e.g. their crystal structure, grain size, and grain boundary
phases. Focusing on state-of-the-art magnetic and spintronic
materials, this book will introduce readers to a range of related
topics in Physics and Materials Science. Phenomena and processes at
the nanoscale are of particular importance in this context;
accordingly, much of the book addresses such topics.
Based on the analytical methods and the computer programs presented
in this book, all that may be needed to perform MRI tissue
diagnosis is the availability of relaxometric data and simple
computer program proficiency. These programs are easy to use,
highly interactive and the data processing is fast and unambiguous.
Laboratories (with or without sophisticated facilities) can perform
computational magnetic resonance diagnosis with only T1 and T2
relaxation data. The results have motivated the use of data to
produce data-driven predictions required for machine learning,
artificial intelligence (AI) and deep learning for
multidisciplinary and interdisciplinary research. Consequently,
this book is intended to be very useful for students, scientists,
engineers, the medical personnel and researchers who are interested
in developing new concepts for deeper appreciation of computational
magnetic resonance imaging for medical diagnosis, prognosis,
therapy and management of tissue diseases.
The interpretation of quantum mechanics has been in dispute for
nearly a century with no sign of a resolution. Using a careful
examination of the relationship between the final form of classical
particle mechanics (the Hamilton-Jacobi Equation) and
Schroedinger's mechanics, this book presents a coherent way of
addressing the problems and paradoxes that emerge through
conventional interpretations.Schroedinger's Mechanics critiques the
popular way of giving physical interpretation to the various terms
in perturbation theory and other technologies and places an
emphasis on development of the theory and not on an axiomatic
approach. When this interpretation is made, the extension of
Schroedinger's mechanics in relation to other areas, including
spin, relativity and fields, is investigated and new conclusions
are reached.
In this book, quantum mechanics is developed from the outset on
a relativistic basis, using the superposition principle, Lorentz
invariance and gauge invariance. Nonrelativistic quantum mechanics
as well as classical relativistic mechanics appear as special
cases. They are the sources of familiar names such as "orbital
angular momentum," "spin-orbit coupling" and "magnetic moment" for
operators of the relativistic quantum formalism. The theory of
binaries, in terms of differential equations, is treated for the
first time in this book. These have the mathematical structure of
the corresponding one-body equations (Klein-Gordon for two spinless
particles, Dirac for two spinor particles) with a relativistically
reduced mass. They allow the calculation of radiative corrections
via the vector potential operator. This second edition of the
successful textbook adds various new sections on relativistic
quantum chemistry and on the relativistic treatment of the proton
in hydrogen. Others chapters have been expanded, e.g. on
hyperfinite interactions, or carefully revisited.
You've heard about Alice's adventures through the looking glass.
Well, Alice is about to embark on another amazing journey. She's
going to shrink again - to the size of a nuclear particle - but
she's not going down the rabbit hole. She's headed for Quantumland.
And what is Quantumland? Think of it as an intellectual amusement
park smaller than an atom, where every ride, game, and attraction
demonstrates a different aspect of quantum mechanics - the often
baffling, always intriguing theoretical framework that seems to
provide the most accurate explanations of the way things are in the
physical world. In this masterful blend of fantasy and science,
Robert Gilmore uses the allegory of Alice's travels to make the
uncertainty principle, Pauli's principle, high-energy particle
physics, and other crucial parts of quantum theory accessible and
exciting.
Quantum mechanics is one of mankind's most remarkable intellectual
achievements. Stunningly successful and elegant, it challenges our
deepest intuitions about the world. In this book, seventeen
physicists and philosophers, all deeply concerned with
understanding quantum mechanics, reply to Schlosshauer's
penetrating questions about the central issues. They grant us an
intimate look at their radically different ways of making sense of
the theory's strangeness. What is quantum mechanics about? What is
it telling us about nature? Can quantum information or new
experiments help lift the fog? And where are we headed next?
Everyone interested in the contemporary but often longstanding
conundrums of quantum theory, whether lay reader or expert, will
find much food for thought in these pages. A wealth of personal
reflections and anecdotes guarantee an engaging read. Participants:
Guido Bacciagaluppi, Caslav Brukner, Jeffrey Bub, Arthur Fine,
Christopher Fuchs, GianCarlo Ghirardi, Shelly Goldstein, Daniel
Greenberger, Lucien Hardy, Anthony Leggett, Tim Maudlin, David
Mermin, Lee Smolin, Antony Valentini, David Wallace, Anton
Zeilinger, and Wojciech Zurek.
This comprehensive textbook provides the fundamental concepts and
methods of dissipative quantum mechanics and related issues in
condensed matter physics starting from first principles. It deals
with the phenomena and theory of decoherence, relaxation and
dissipation in quantum mechanics that arise from the random
exchange of energy with the environment. Major theoretical advances
in combination with stunning experimental achievements and the
arising perspective for quantum computing have brightened the field
and brought it to the attention of the general community in natural
sciences. Expertise in dissipative quantum mechanics is by now
beneficial in a broad sphere.This book - originally published in
1992 and republished as enlarged and updated second, third and
fourth edition in 1999, 2008, and 2012 - dives even deeper into the
fundamental concepts, methods and applications of quantum
dissipation. The fifth edition provides a self-contained and
updated account of the quantum mechanics and quantum statistics of
open systems. The subject matter of the book has been thoroughly
revised to better comply with the needs of newcomers and the
demands of the advanced readership. Most of the chapters are
rewritten to enhance clarity and topicality. Four new chapters
covering recent developments in the field have been added. There
are about 600 references. This book is intended for use by advanced
undergraduate and graduate students in physics, and for researchers
active in the field. They will find the monograph as a rich and
stimulating source.
This comprehensive textbook provides the fundamental concepts and
methods of dissipative quantum mechanics and related issues in
condensed matter physics starting from first principles. It deals
with the phenomena and theory of decoherence, relaxation and
dissipation in quantum mechanics that arise from the random
exchange of energy with the environment. Major theoretical advances
in combination with stunning experimental achievements and the
arising perspective for quantum computing have brightened the field
and brought it to the attention of the general community in natural
sciences. Expertise in dissipative quantum mechanics is by now
beneficial in a broad sphere.This book - originally published in
1992 and republished as enlarged and updated second, third and
fourth edition in 1999, 2008, and 2012 - dives even deeper into the
fundamental concepts, methods and applications of quantum
dissipation. The fifth edition provides a self-contained and
updated account of the quantum mechanics and quantum statistics of
open systems. The subject matter of the book has been thoroughly
revised to better comply with the needs of newcomers and the
demands of the advanced readership. Most of the chapters are
rewritten to enhance clarity and topicality. Four new chapters
covering recent developments in the field have been added. There
are about 600 references. This book is intended for use by advanced
undergraduate and graduate students in physics, and for researchers
active in the field. They will find the monograph as a rich and
stimulating source.
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