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Meneghetti M: Introduzione al lensing
gravitazionale

Introduzione al lensing gravitazionale

Con esempi in Python

Lecture Notes in Physics

This book introduces advanced graduate students and researchers to causal set theory, offering a comprehensive discussion of its core tools. It begins with a broad, largely non-technical overview of causal set theory, situating it within the broader context of the quantum gravity problem. Discreteness and causality serve as the cornerstones of this approach, as articulated by Bombelli, Lee, Meyer, and Sorkin. The technical introduction to causal set theory starts with results on the order-theoretic foundations of Lorentzian geometry, providing a strong theoretical basis. Subsequent chapters address kinematics, including geometrical reconstruction from the discrete substructure, quantum field theory on causal sets, non-perturbative formulations, and results in the quantum dynamics of causal sets. The book concludes with a brief discussion of causal set phenomenology and some open questions.Written with a clear and pedagogical approach, this book highlights the mathematical challenges inherent in causal set theory. Readers are expected to have prior knowledge of general relativity and quantum field theory. To support understanding, exercises are included throughout the text, enabling readers to test their knowledge.

An Introduction

The Causal Set Approach to Quantum Gravity

Handbook of Electronic Structure Theory provides a much-needed learning resource that collects and demonstrates the various key methods involved in electronic structure theory, the feasibility and reliability of electronic structure calculations and their applications using computational chemistry, with a particular focus on the most modern and recent problems which are poorly covered in existing, largely outdated book literature. This handbook is designed with early career researcher learning in mind by aiming to provide a careful, structured, coherent, measured, and incremental presentation of the subject matter as well as appropriate problems and worked tutorial examples. Elements like summary boxes, worked examples, and downloadable data sets make this a holistic guide to the topic for learners from different backgrounds who require a deeper understanding of electronic structure theory. Part I one of the book focuses on the critical core theories, before Part II moves on to some of the most important recent developments and their potential future directions, including key topics such as the electronic excited states and the harnessing of machine learning. Finally, Part III then collects a range of key case study examples of applications such as for biomolecules, in spectroscopy, or for use in catalysis amongst others. Handbook of Electronic Structure Theory is written primarily for masters, PhD, and postdoctoral students in theoretical and computational chemistry as well as experimental researchers wishing to apply quantum chemical methods in a critical way. The book will also have significant relevance to those studying and teaching in the adjacent fields of computational physics, materials science, and astrochemistry, who are making use of electronic structure methods. It is also likely to be of interest to chemists working on designing new materials and compounds targeting industrial and environmental applications such as catalysis, energy harvesting or green chemistry.

Methods and Applications

Handbook of Electronic Structure Theory

This book accompanies another book by the same authors, Introduction to the Theory of the Early Universe: Hot Big Bang Theory (Second Edition) and presents the theory of the evolution of density perturbations and relic gravity waves, the theory of cosmological inflation, and post-inflationary reheating. Written in a pedagogical style, the main chapters give a detailed account of the established theory, with derivation of formulas. Being self-contained, it is a useful textbook for advanced undergraduate students and graduate students. Essential materials from General Relativity, theory of Gaussian random fields and quantum field theory are collected in the appendices. The more advanced topics are approached similarly in a pedagogical way. These parts may serve as a detailed introduction to current research.Particle physics and cosmology enjoyed rapid development between the first and the second editions of this book. In the second edition, the numerical values of particle physics and cosmological parameters have been updated in accordance to contemporary data.

Introduction To The Theory Of The Early Universe: Cosmological Perturbations And Inflationary Theory

Musk versus Bezos. China versus the United States. The government versus the private sector. Welcome to the rivalries and alliances defining the New Space Age. At stake? Billions of dollars, national prestige, and a place in the history books. Moon landings and space walks once captivated the public’s attention. But, in recent decades, the U.S. space enterprise has felt moribund. Now, that’s finally about to change. A fleet of powerful new rockets is poised to take humans into the cosmos more than ever before. A lunar land rush has sparked a geopolitical competition among nations. And the world’s two richest men have engaged in escalating brinkmanship, as NASA and the U.S. government embraces Silicon Valley innovation to jump-start the nation’s ambitions. Space has entered a golden age, and this is just the beginning. In this gripping work, award-winning Washington Post writer Christian Davenport chronicles the mad scramble to shape humanity’s off-planet future. He takes readers behind the scenes at NASA and the Pentagon as China’s aggressive moon mining plans raise alarms, onto the sprawling Cape Canaveral factory where Blue Origin is working toward Amazon-style lunar deliveries, and onto SpaceX launch pads as Musk’s engineers log 100-hour weeks—leaving veteran astronauts marveling that they’re now operating “flying iPhones.” &nbsp; What will happen as human ambition outpaces governmental regulation? Which country will win the race back to the moon? Was Donald Trump’s much-derided creation of the Space Force a surprising act of foresight, and will the U.S. finally make a real push to the moon and eventually toward Mars? Masterfully paced, rigorously reported, and vividly told, Rocket Dreams offers a riveting, fly-on-the-wall account of the grit-fueled global battle to push humankind further into the cosmos—revealing that the science fiction dreams of the last century may soon become our reality.

Musk, Bezos, and the Inside Story of the New, Trillion-Dollar Space Race

Rocket Dreams

Advanced Series In Astrophysics And Cosmology

The current cosmological model relies on inflationary theories, which incorporate baryosynthesis, dark matter, and dark energy. Supported by precise cosmological data, it necessitates physics beyond the standard models of fundamental forces, including gravity. This connection between macroscopic gravity on large scales and quantum gravity on the smallest scales is where quantum gravity's nature becomes evident. Quantum gravity effects alter our classical understanding of gravitational phenomena as described by General Relativity, leading to observable deviations from the conventional cosmological model. The field of cosmoparticle physics explores the interplay between the micro and macro worlds, offering insights into the development of quantum gravity and its cosmological implications. In this work we hence wanted to cover all the amazing developments which have happened on the interface of quantum gravity theories and cosmology, making it a valuable resource for any researcher interested in exploring these fields in depth or starting research in them.

Quantum Gravitational Imprints On Cosmology

Oxford Graduate Texts

Exploring the Dark Side of the Universe

Gravitational-Wave Astronomy

Fundamental Theories of Physics

This book highlights that Mass and Proper Time, which are well-defined classically, have all sorts of conceptual problems when considered quantum- machanically. When systems interact, the masses change to include binding energies, etc., but are not treated as variables within the standard formalism. Similarly, proper time becomes an ambiguous concept when particles are entangled, or when they can take several different paths. But the formalism can easily be extended, so that they become conjugate dynamical variables, and there is an uncertainty principle between mass and proper time. There are many examples of this, but it is not easy to prove convincingly, since one can always experimentally change a mass-time relationship into a momentum-position one, which is well known. It is only in the case of unstable particles, where one sees a clear difference. The new formalism treats a system where particles can decay, even classically, which they cannot do conventionally. In this capacity, the theory merges into other situations where particles decay. But it is clear within this theory, that the mechanism that controls how masses change is gravitational, and so one finally has the possibility of merging gravity with the other forces of nature in a natural way. This can be accomplished by a natural extension of the principle of equivalence. The book describes how the theory naturally blends gravity into the other forces, providing a hope for an integrated theory of the forces of nature.&nbsp;The emphasis of the book is always physical, rather than mathematical, so that the theory does not seem to be an ad-hoc mathematical add-on to conventional theories.

Proper Time and Mass as Dynamical Variables

Tra i fenomeni celesti più affascinanti, occupano un posto d'onore le eclissi totali del Sole e l'apparizione delle grandi comete. Mentre le eclissi sono eventi rari per una singola località - mediamente una ogni 60-70 anni in Italia, dalla superficie di circa 300 mila km quadrati - le comete si manifestano più frequentemente, con una grande cometa visibile da gran parte del pianeta, circa ogni dieci anni. Questi eventi offrono a chiunque l'opportunità di assistere a uno dei più straordinari spettacoli astronomici. Questo libro, scritto in modo chiaro e accessibile, esplora non solo le meraviglie attuali delle comete, ma ripercorre anche la storia della loro comprensione, dai miti dell'antichità alle superstizioni del Medioevo, fino alle scoperte scientifiche moderne. Una narrazione che svela come la scienza abbia trasformato ciò che un tempo era considerato pura fantascienza: oggi, le comete sono esplorate da navicelle spaziali. Inoltre, il volume affronta un tema cruciale: sebbene le comete possano incantarci con i loro spettacoli, rappresentano anche potenziali minacce per la nostra civiltà. Scoprite come queste straordinarie creature del cielo continuano a influenzare il nostro mondo, tra bellezza e rischio.

Astri insoliti, affascinanti e imprevedibili ma anche potenzialmente pericolosi

Comete

How do you explore distant stars, buried water on Mars or the first moments after the Big Bang - without leaving your back garden? In The Radio Universe, award-winning astrophysicist Emma Chapman takes us on an electrifying voyage through the cosmos using one of the most powerful, yet overlooked, tools in science: the radio wave. With dazzling clarity and humour, Chapman reveals how these invisible messengers glide through space, bounce off planets, tunnel through clouds and slip past galactic dust - carrying secrets of the universe that no other kind of light can uncover. We follow a single radio wave as it escapes Earth and travels outward - ricocheting off the Moon, tunnelling through Venus's furnace-thick atmosphere, tracing ancient ice hidden in Mercury's shadows and diving deep into the swirling arms of the Milky Way. Along the way, we meet black holes that roar louder than stars, pulsars more precise than atomic clocks and galaxies lit by the very first starlight. We explore volcanic pancake planets, death-defying neutron stars, the eerie possibility of alien broadcasts - and the fragile question of our own future in the cosmos. A celebration of human ingenuity and cosmic curiosity, The Radio Universe reveals that the true frontier of space isn't 'out there' - it's humming quietly all around us, waiting to be heard.

How to Explore Outer Space Without Leaving Earth

The Radio Universe

This book focuses on the linkages between very high energy (TeV or 1012 electron-volt) gamma-ray astronomy and the interstellar medium (ISM), and the key science questions expected to be answered. Their joint study is essential if we are to understand the nature of gamma-ray emission and hence shed light on where extreme cosmic-rays and electrons are being accelerated in our galaxy. Since TeV neutrinos are also intimately tied to the production of gamma-rays of similar energy, we would also extend our discussion to this field.

Gamma-rays And The Interstellar Medium

This catalogue is the first comprehensive presentation of the life and work of the artist couple Anna-Eva Bergman and Hans Hartung, who were linked by common interests such as nature, the cosmos, and music. Bergman, who was of Swedish Norwegian origin, was a pioneering abstract artist who was inspired by landscapes and natural forms. Hartung, born in Germany, was instrumental in the development of gestural abstraction in Europe. The two biographies are traced on the basis of drawings, paintings, archive documents and photographs: from their first meeting in the 1920s, through many years of separation, to their reunion in 1952 and their deaths in the 1980s.Anna-Eva Bergman (1909-1987) was a Scandinavian artist known for her landscape-inspired abstractions and use of gold leaf in her art. Her works often recall rocks, trees, or other natural forms drawn from her extensive travels. Bergman was also a photographer, printmaker, and architect.&nbsp;Hans Hartung (1904-1989) was a German artist renowned for his contributions to abstract painting. His gestural style was crucial to the rise of art informel in Europe. He won the Grand International Prize for Painting at the 1960 Venice Biennale. His art is held in major collections internationally.

Anna-Eva Bergman & Hans Hartung And We’ll Never Be Parted

For the first time in four billion years of life on Earth, we are preparing to step out among the stars, not just as lone astronauts or billionaire tech bros, but as a civilization. Dr Adriana Marais has dedicated her life to preparing form extraplanetary settlement, and here, she considers not just the scientific concerns of a multiplanetary existence (like terraforming and life-support systems), but also the ethical responsibilities we must carry with us as we explore new frontiers. In this extraordinary era of rapid technological development, Marais explores the fundamental questions at the heart of human endeavour: How did we get here - and where are we going next?

Notes from a Physicist on Space Exploration

Out of this World and into the Next

Introduzione al lensing gravitazionale

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