Kvantefysik (kvantemekanik og kvantefeltteori)

‘Hverdagsmad fra River Cottage’ er den ultimative grundkogebog for alle, der har en holdning til den mad, de spiser til daglig. Heri er samlet Hugh Fearnley-Whittingstalls bedste bud på økonomisk, sund og velsmagende hverdagsmad – og alle kan være med. Den frygtløse kok Hugh Fearnley-Whittingstall er kendt fra DR2’s programserie ‘River Cottage’, hvor han har lært danskerne om bedre madvaner, bæredygtighed og vigtigheden af gode råvarer. Ifølge Hugh er det nemlig sådan, at ændrer man menneskers holdning til mad, ændrer man deres holdning til livet! Og det er netop udgangspunktet for denne kogebog fra River Cottage, der med massevis af lækre opskrifter og tips til hverdagen giver et bud på en sundere hverdagskost for alle. Det er mad med holdning og velsmag.

Do we have free will? Is the universe compatible with God? Do we live in a computer simulation? Does the universe think?Physicists are great at complicated research, but they are less good at telling us why it matters. In this entertaining and groundbreaking book, theoretical physicist Sabine Hossenfelder breaks down why we should care. Drawing on the latest research in quantum mechanics, black holes, string theory and particle physics, Existential Physics explains what modern physics can tell us about the big questions.Filled with counterintuitive insights and including interviews with other leading scientists, this clear and yet profound book will reshape your understanding of science and the limits of what we can know.

100 års kvantemekanik har været et overflødighedshorn af overraskelser. Lige siden videnskabshistoriens mest succesrige teori blev skabt i København i 1920’erne har den været ombrust af debat. Filosofiske fortolkninger, vidunderlig fysik, teknologiske chok såsom atombomben og et helt nyt bud på computerens fremtid. Kvantefysikken bliver ved med at yde. Dens sære og mærkelige form for matematik viser sig nu at ligne hverdagsoplevelser i menneskesindet mere end nogen skulle have troet. I syv sind tegner et billede af de mangfoldige og modsætningsfyldte særpræg ved atomernes fysik og menneskers måde at opleve verden på. Men også en advarsel om at tidens store begejstring for kvanteteknologier kan vise sig overophedet. Der er brug for en demokratisk debat om kunstig intelligens og kvantecomputere.  Tor Nørretranders skrev i 1985 Det udelelige – Niels Bohrs aktualitet i fysik, mystik og politik (genudgivet i 2022). Den fortalte historien om den dengang oversete fysisk forskning, der i december 2022 blev hædret med Nobelprisen i fysik. I syv sind fortsætter den forunderlige historie.

Kvantefysik er overalt omkring os. Det er grundlaget for vores forståelse af naturlovene, fra atomers opførsel til hele universets. Men kvanteuniverset forbliver indhyllet i mystik ved at påstå, at en partikel kan være to steder på samme tid, eller at en kat kan være både død og levende.Tag med på et eventyr for at møde pionererne – Bohr, Einstein, Heisenberg og andre – inden for den moderne fysik på en svimlende rejse, der viser kvanteunivesets uendelige mangfoldighed.Skrevet af Thibault Damour, teoretisk fysiker og professor ved Institutdes Hautes Etudes Scientifiques og medlem af det franske Académiedes Sciences. Han er kendt verden over for sit banebrydende arbejde med sorte huller, pulsarer, gravitationsbølger og kvantekosmologi. Han har modtaget adskillige priser, herunder den prestigefyldte Einsteinmedalje.Tegnet af Mathieu Burniat, der i Frankrig er kendt for sine populærhistoriske fortællinger, der ud over "Kvanteuniverset" også afspejler hans interesser i gastronomi ("La Passion de Dodin-Bouffant "), naturen ("Sous terre") og vores hjernes funktion ("Une mémoire de roi ").

Quantum Supremacy: How the Quantum Computer Revolution Will Change Everything is a groundbreaking book penned by the renowned physicist, Michio Kaku. Published by DOUBLEDAY & CO in 2023, this book delves into the fascinating world of quantum computing and its potential to revolutionize our lives. The book is a must-read for those who are interested in the intersection of science, technology, and the future. Kaku, with his knack for simplifying complex scientific concepts, takes readers on an exciting journey through the quantum realm. He discusses how quantum supremacy - the point where quantum computers surpass traditional computers in computational ability - will change everything from medicine to cryptography. This English language book is not just for tech enthusiasts but also for anyone curious about the future of technology and its impact on society. Don't miss out on this intriguing exploration of quantum computing, brought to you by DOUBLEDAY & CO.

In a world driven by technology and data, classical computing faces limitations in tackling complex challenges like climate modeling and financial risk assessment. These barriers impede our aspirations to revolutionize industries and solve intricate real-world problems. To bridge this gap, we must embrace quantum computing. Edited by Alex Khang PH, Principles and Applications of Quantum Computing is a transformative solution to this challenge. It delves into the interdisciplinary realms of computer science, physics, and mathematics, unveiling the incredible potential of quantum computing, which outperforms supercomputers by 158 million times. This technology, rooted in quantum mechanics, offers solutions to global problems and opens new frontiers in AI, cybersecurity, finance, drug development, and more. By engaging with this book, you become a pioneer in the quantum revolution, contributing to reshaping the limits of what's achievable in our digital age.

By the star physicist and author of multiple #1 Sunday Times bestsellers, a major and definitive narrative work on black holes and how they can help us understand the universe. At the heart of our galaxy lies a monster so deadly it can bend space, throwing vast jets of radiation millions of light years out into the cosmos. Its kind were the very first inhabitants of the universe, the black holes.Today, across the universe, at the heart of every galaxy, and dotted throughout, mature black holes are creating chaos. And in a quiet part of the universe, the Swift satellite has picked up evidence of a gruesome death caused by one of these dark powers. High energy X-ray flares shooting out from deep within the Draco constellation are thought to be the dying cries of a white dwarf star being ripped apart by the intense tides of a supermassive black hole ? heating it to millions of degrees as it is shredded at the event horizon.They have the power to wipe out any of the universe's other inhabitants, but no one has ever seen a black hole itself die. But 1.8 billion light years away, the LIGO instruments have recently detected something that could be the closest a black hole gets to death. Gravitational waves given off as two enormous black holes merge together. And now scientists think that these gravitational waves could be evidence of two black holes connecting to form a wormhole ? a link through space and time. It seems outlandish, but today's physicists are daring to think the unthinkable ? that black holes could connect us to another universe.At their very heart, black holes are also where Einstein's Theory of General Relativity is stretched in almost unimaginable ways, revealing black holes as the key to our understanding of the fundamentals of our universe and perhaps all other universes.Join Professors Brian Cox and Jeff Forshaw in exploring our universe's most mysterious inhabitants, how they are formed, why they are essential components of every galaxy, including our own, and what secrets they still hold, waiting to be discovered.

Quantum Mechanics in Curved Spacetime: A Comprehensive Exploration takes readers on a fascinating journey through the fusion of quantum mechanics and general relativity, unraveling the mysteries of quantum fields in curved geometries, black holes, quantum cosmology, entanglement, and more. This comprehensive guide offers a mathematical framework and explores the cutting-edge research in quantum gravity and the potential applications in quantum technology. Join Kuro Aksara as they navigate the uncharted territory where spacetime and probability blend, providing insights into the fundamental nature of the universe.

Tiden er en gåde. For at løse den tager fysiker Troels Harmark os med på en rejse tilbage til antikkens græske filosoffer, videre op gennem naturvidenskabens historie til bl.a. Newton og Einstein og helt ud til forskningsfronten i moderne fysik og de største spørgsmål som, hvordan universet blev til. Tiden oprandt ved universets fødsel, og vi lever stadig i tiden her 13,8 milliarder år senere. Vi har en krop, der ældes, og kan ikke forestille os vores liv uden tid – vi indordner os under den, og tænker, at den bevæger sig regelmæssigt, som visernes præcise vandring over døgnets timer på uret. Men fysikken beretter en anden historie – om tidens relativitet: at den går langsommere tæt ved Jordens overflade end på toppen af et bjerg, at tiden står stille på kanten af sorte huller, og at universet udvider sig uendeligt. Tidens gang skal findes imellem de to modpoler: at alt er tilfældigt og at alt er uafvendeligt. På sporet af tidens gåde handler om, hvordan det hele hænger sammen, og hvordan det kan være, at man regner med, at tiden en dag vil stoppe med at gå. Hvordan skal vi forstå tiden?

Delta-c Mechanics is a field free particle based alternate approach to the physical interaction between mass and photons by way of the Feynman action path probabilities, offering a new approach to mechanical dynamics, and particle structure. It is based on the Feynman view of QED that photons going from one point to another follow all paths and there is a probability that the particles actually exist on those paths. Additionally photon densities moving in one direction retard opposite moving photons and thus create a change in c, as a result of their presence.Delta-c Mechanics starts with Feynman's action paths and continues a particle based theory. It extends Feynman's presumption in that there is an actual probability of the Feynman path photons being on these paths. This is evidenced by measurements of the Anomalous Magnetic Moment and the Aharonov-Bohm effect. It is presumed that photons taking the action path, not only have delays but the probability density of these photons being there, affecting the speed of light and the motions of other particles.

Time, space and entanglement are the main characters in this book. Their nature is still a great mystery in physics and we study here the possibility that these three phenomena are closely connected, showing how entanglement can be at the basis of the emergence of time and space within closed quantum systems. We revisit and extend the Page and Wootters theory that was originally introduced in order to describe the emergence of time through entanglement between subsystems in a globally static, quantum Universe. In the book, after providing a complete review of the salient aspects of the theory, we establish a connection with recent research on the foundations of statistical mechanics and we provide a new understanding of the thermalization process. Furthermore, we generalize the framework in order describe the spatial degree of freedom and we provide a model of 3+1 dimensional, quantum spacetime emerging from entanglement among different subsystems in a globally "timeless" and "positionless" Universe. Finally, via the Page and Wootters theory, the evolution of quantum clocks within a gravitational field is treated and a time dilation effect is obtained in agreement with the Schwarzschild solution.

This Book is the first volume of the series "The Alethiology Proper".The Alethiology Proper is a new and independent discipline of Study (Science) which is a pure logical study of the nature of Reality and Truth.Etymologically "The Alethiology Proper" is defined as the "the Science of Truth Proper". In this study, Reality and Truth are taken as dual realities of the Same. Therefore, "The Alethiology Proper" can also be defined as "the Science of Reality Proper".This Study of Alethiology Proper has its unique methodology of study which has enabled to explore the ultimate answers of the Universe. Through this Study we can explore the Beginning and End of the Universe with absolute certainty. This Study has access even to Nothing and shows with absolute certainty what Nothing is and how Something came out of Nothing.Until now there were many unanswered questions about the Origin of Universe, Existence of God, Origin of Life etc. There are many conflicting theories, ideas, philosophies regarding the Truth of Everything due to the absence of Certainty of the Truth. This Study answers the questions of Origin of Universe, God, Life, Reality and Truth with absolute certainty.This study has bridged the two extremes (though in actuality are not) of Reality, namely Science and Religion, Physical and Spiritual, Seen and Unseen. Therefore, both realities can now be scientifically studied and confirmed with absolute certainty. This Study has independently explored the Reality and have come up with the answer that there is indeed God, a Triune Eternal Living Being.Before I say anything further, I would like to give assurance that this study is purely scientific which is purely objective in nature, therefore, all the ideas of this book could be experimentally verified with absolute certainty. This is not a mere philosophical book filled with subjective opinions or interpretations, but this is a purely objective and scientific study. If the ideas of this book are not equivalent in certainty as the Truth 2+2=4 is, then it may be considered as a fictional work.

This book provides a captivating journey through the realms of classical and quantum systems as it unravels the profound influence that noise may have on their static and dynamic properties. The first part of the book offers succinct yet enlightening discussions on foundational topics related to noise. The second part focuses on a variety of applications, where a diverse spectrum of noise effects in physical systems comes to life, meticulously presented and thoughtfully analyzed. Whether you are a curious student or a dedicated researcher, this book is your key to gaining invaluable insights into noise effects in physical systems. ¿The book has the merit of presenting several topics scattered in the literature and could become a very useful reference.¿ Giovanni Jona-Lasinio, Sapienza ¿ Università di Roma, Italy

The author offers an introduction to the multiverse hypothesis and the current theories attempting to challenge it. This serves as the foundation for addressing the question posed in the title, "Is There a Replica of Me in an Alternate Universe?". Additionally, the author presents a fresh hypothesis, grounded in established and verified quantum theory, with the aim of disproving the notion that an identical version of ourselves exists in an alternate universe.

This volume commemorates the scientific contributions of Detlef Dürr (1951¿2021) to foundational questions of physics. It presents new contributions from his former students, collaborators, and colleagues about their current research on topics inspired or influenced by Dürr. These topics are drawn from physics, mathematics, and philosophy of nature, and concern interpretations of quantum theory, new developments of Bohmian mechanics, the role of typicality, quantum physics in relativistic space-time, classical and quantum electrodynamics, and statistical mechanics. The volume thus also gives a snapshot of present research in the foundations of physics.

Dimension Six offers a fresh perspective on the enigmatic relationship between the physical world and consciousness.

A guide to connecting with the nine dimensions of consciousness

Size reduction in mesoscopic and nano-scoping electronic and plasmonic devices makes classical quantum mechanics (QM) and electrodynamics (QED) in electronics inevitable. Electronics engineers are unfamiliar with the mathematical apparatus in QM and QED, which can be formidably abstract. This book explains QM and QED to engineers.

Der kleine Wilfried will endlich Frieden. Selbst ins Gefängnis würde er dafür gehen, so unerträglich ist seine Situation inzwischen. Seit seiner Geburt musste er große Herausforderungen bewältigen. Aufgrund der eklatanten Familienverhältnisse und einer komplexen Verletzung seiner oberen Halswirbelsäule wurde sein Leben letztendlich ein Kampf ums Überleben.Sein Klagen über die schmerzhaften und schwer einschränkenden körperlichen Symptome stieß ausschließlich auf Belächeln und Missachtung. Bis er scheinbar willkürlich in den Wahnsinn getrieben wurde. Das Inhalieren seiner Kräutermischung empfand er nämlich eindeutig als medizinisch wirksam zur Linderung der Symptome.Dennoch scheiterte er beruflich. Infolge wurde er von seiner Omi und seiner Mutter, die ihn so sehr liebten und für ein kleines Genie hielten, durch öffentliche Diffamierung zerstört. Die regelrechte Verfolgung durch die Elektroindustrie, klein Wilfried war offenbar ein gefragter Ingenieur, brach ihm letztendlich sein bereits angeknackstes Genick. So groß und verrückt wurde die Aktion.Im Laufe der Jahre konnte er sein Leiden letztendlich begreifen. Begann Literatur und Beschwerden zu studieren, und versuchte alles Mögliche um diese zu kurieren. Längst wollte er einen Rechtsanwalt finden, um endlich diese Zerstörung seiner Person zu unterbinden. Doch vorerst gab es keine Alternative als die erneute Flucht vor diesem folgenschweren Fluch, und so verfasste er dieses autobiografische Buch.

On July 4, 2012, physicists at the Large Hadron Collider in Geneva madehistory when they discovered an entirely new type of subatomic particle that many scientists believe is the Higgs boson. For forty years, physicists searched for this capstone to the Standard Model of particle physics?the theory that describes both the most elementary components that are known in matter and the forces through which they interact. This particle points to the Higgs field, which provides the key to understanding why elementary particles have mass. In Higgs Discovery, Lisa Randall explains the science behind this monumental discovery, its exhilarating implications, and the power of empty space.

This brief offers an introduction to the fascinating new field of quantitative read-across structure-activity relationships (q-RASAR) as a cheminformatics modeling approach in the background of quantitative structure-activity relationships (QSAR) and read-across (RA) as data gap-filling methods. It discusses the genesis and model development of q-RASAR models demonstrating practical examples. It also showcases successful case studies on the application of q-RASAR modeling in medicinal chemistry, predictive toxicology, and materials sciences. The book also includes the tools used for q-RASAR model development for new users. It is a valuable resource for researchers and students interested in grasping the development algorithm of q-RASAR models and their application within specific research domains.

Der heutigen Naturphilosophie kommen in der Naturwissenschaft folgende drei Funktionen zu: die Herausarbeitung der grundlegenden Aussagen der wissenschaftlichen Theorien, ihre realistische Deutung innerhalb eines Weltbildes und die Bereitstellung von naturphilosophischen Leitideen zur Anregung der einzelwissenschaftlichen Forschung. Im ersten Teil des Buches wird die heutige methodologische und erkenntnistheoretische Situation der Naturwissenschaft analysiert. In Teil II werden die grundlegenden Phänomene und mathematischen Strukturen der wichtigsten physikalischen Theorie unserer Zeit, der Quantenmechanik, dargestellt und die Welt mit einem Computer verglichen, um damit die mathematischen Formalismen der theoretischen Physik semantisch zu deuten. Die mathematischen Strukturen der physikalischen Theorien besitzen danach eine wirkliche Existenzweise, insofern sie als Software in der Wirklichkeit, im Quantenvakuum, implementiert sind, und beobachtete Objekte sind Abbildungen auf dem Bildschirm bzw. auf den Bildschirmen des Weltcomputers, d.h. Projektionen in die Raumzeit. In Teil III werden aus dem Computer-Weltbild Anregungen für künftige wissenschaftliche Forschungen hergeleitet. Kernstücke bilden hierbei Überlegungen zum Leib-Seele-Problem und zum Funktionalismus der Biologie.

This book provides an alternative approach to time-independent perturbation theory in non-relativistic quantum mechanics. It allows easy application to any initial condition because it is based on an approximation to the evolution operator and may also be used on unitary evolution operators for the unperturbed Hamiltonian in the case where the eigenvalues cannot be found. This flexibility sets it apart from conventional perturbation theory. The matrix perturbation method also gives new theoretical insights; for example, it provides corrections to the energy and wave function in one operation. Another notable highlight is the facility to readily derive a general expression for the normalization constant at m-th order, a significant difference between the approach within and those already in the literature. Another unique aspect of the matrix perturbation method is that it can be extended directly to the Lindblad master equation. The first and second-order corrections are obtained for this equation and the method is generalized for higher orders. An alternative form of the Dyson series, in matrix form instead of integral form, is also obtained. Throughout the book, several benchmark examples and practical applications underscore the potential, accuracy and good performance of this novel approach. Moreover, the method's applicability extends to some specific time-dependent Hamiltonians. This book represents a valuable addition to the literature on perturbation theory in quantum mechanics and is accessible to students and researchers alike.