Read n a by Amir D. Aczel حوسێن حوسێنی ئومێد غەریب Online

n a

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Title : n a
Author :
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ISBN : 30816297
Format Type : Paperback
Number of Pages : 304 Pages
Status : Available For Download
Last checked : 21 Minutes ago!

n a Reviews

  • Jason Furman
    2018-10-27 01:20

    A decent book on Entanglement. Suffers from my pet peeve in popular science books -- which is repeating lots of material you have read over and over again. You would think that someone coming to a book on Entanglement would have read a few other accounts of quantum mechanics before and doesn't need to re-read the familiar history starting from the Greeks through Planck and Bohr, Heisenberg and the rest of the early pioneers. Or that someone who wants an introduction to quantum mechanics would not want to start with a book that focuses on one aspect. The book also suffers from too much biography, which would be fine if it were not for the fact that it features 20+ scientists -- so that mini-biographies of each weigh down the explication.The second half is interesting, including both theoretical work like Bell's theorem and the experimental tests of it. You can never really understand this material without going through the actual physics (and even then you can't actually understand it), but the shortness of the explication made one suffer a little more than normal in a book of this sort. Plus there was a lot less on applications of entanglement, like encryption, than I might have liked.

  • Willa Grant
    2018-10-23 05:05

    I love this book- it is one that a non maths, non physics person can grasp- I re-read it once a year or so & continue to get new thoughts from it. The ideas presented are mind expanding.

  • Stan Paulsen
    2018-10-22 03:10

    I think more than a few entangled photons whooooshed right over my head while reading this book. Still I was spellbound with what I did understand. I loved learning about all the physicists that contributed to quantum theory and the experiments they designed and performed. I had some trouble following some of those experiments, however, but the ones I did understand were absolutely fascinating.Einstein was right, this stuff is spooky, but how very interesting! If it weren't for all of the rigorous data behind "the most successful theory in science" I would have trouble believing entanglement is nothing more than the rantings of a bunch of really smart crackpots. The reality is more bizarre than what even the best mad scientists can come up with.

  • Doug Boone
    2018-11-06 00:05

    I've read some other books by Aczel, most recently "God's Equation: Einstein, Relativity, and the Expanding Universe." I liked it a lot. He's pretty good at explaining difficult concepts without using so many formulas that your eyes glaze over. He describes this approach pretty well in the preface to Entanglement. The first chapters introduce a lot of players and concepts that are only peripherally important to understanding entanglement; "spooky action at a distance" as Einstein called it. I think there are too many of these short biographical chapters, kind of like a mystery novel where the exposition goes on too long. The book really picks up for me when he gets into what I think is a very clear explanation of Heisenberg's uncertainty principle. It's kind of strange that Einstein doesn't even appear in this book in a significant way until about 100 pages in, but the story of his relationship, and disagreement, with Niels Bohr is fun to read. Liked it.

  • lk05321
    2018-10-27 03:06

    A great book on a very bizarre fact of quantum physics. Beware, you need a strong mind for science and logic, otherwise this book will smash your brain. Hmm... can teleportation be possible? This book, for the first half, has a lot of history about the theory.

  • Pierre Menard
    2018-11-14 01:21

    Il volume del matematico e divulgatore scientifico israeliano Amir Aczel è interamente dedicato al fenomeno fisico dell’entanglement quantistico fra due o più particelle, che consiste in una correlazione che lega le particelle in modo tale da violare il principio di località e costituire il punto di partenza per tutta una serie di effetti sperimentali controintuitivi e di potenzialità fantascientifiche (dalla crittografia quantistica al teleporting) che si stanno a poco a poco concretizzando, pur tra mille difficoltà teoriche e pratiche.Come dichiarato nell’introduzione, Aczel vuole narrare la vicenda scientifica e umana che ha portato all’individuazione e alla comprensione teorica e sperimentale del fenomeno in questione. Il pubblico a cui si rivolge è abbastanza ampio, e non necessariamente esperto di fisica. Le spiegazioni sono di buon livello, molto chiare ma anche estremamente semplici. Si fa poco uso della matematica e le notazioni simboliche sono ridotte all’osso. Delle applicazioni, sempre volutamente, si parla di sfuggita nelle ultime pagine del libro, giusto per dare un qualche spunto per ulteriori letture: se il lettore è interessato a scoprire come si potrebbe realizzare il teletrasporto di un essere vivente, deve rivolgersi altrove. Forse manca un po’ di rigore, ma bisogna tener presente la difficoltà insita nel presentare temi che per essere compresi fino in fondo richiederebbero una laurea in matematica o in fisica.Il giudizio sul libro perciò deve riguardare essenzialmente la qualità della presentazione dell’argomento centrale, l’entanglement, e dei passi fatti dai numerosi fisici coinvolti nel lungo cammino verso la sua comprensione, non ancora terminato. Ed è purtroppo un giudizio non del tutto sufficiente: lo dico con dispiacere per l’interesse – non solo professionale – che nutro verso questo tema. Il libro è un po’ sbilanciato: Aczel dedica troppo spazio alla prima parte (circa 100 pagine), che descrive i fondamenti della meccanica quantistica, da Young fino a von Neumann, passando per Bohr, Heisenberg, Schrödinger etc., soprattutto perché si perde in dettagli biografici, seppure interessanti e divertenti, a discapito dei contributi scientifici (si veda per esempio il capitolo dedicato a von Neumann, forse il più carente da questo punto di vista). C’è anche una certa incoerenza nella successione degli eventi: ad esempio il capitolo dedicato a Einstein andava anticipato o quanto meno diviso in più parti, per evitare una certa confusione cronologica - dato che la spiegazione dell’effetto fotoelettrico precede di molto il lavoro sul paradosso EPR. Se il lettore ha una certa conoscenza, anche piuttosto limitata, della teoria quantistica, potrebbe iniziare a leggere dal cap. 11. Le cose cominciano a migliorare a partire dalla descrizione del fondamentale contributo di John S. Bell, che ha permesso ai fisici di testare sperimentalmente una visione filosofica (metafisica) della realtà. La parte più bella e affascinante è sicuramente quella compresa nei capitoli 13-17, dove si affrontano in modo analitico i complessi esperimenti che hanno portato alla conferma della validità della meccanica quantistica e alla sconfitta dell’approccio einsteiniano delle variabili nascoste. Sembra tuttavia che questa parte non sia stata sottoposta ad un adeguato lavoro di editing: mancano i nessi logici fra un paragrafo e l’altro e si verificano spesso riprese e vere e proprie ripetizioni. Talvolta pare che il testo sia stato riscritto più volte e poi ci si sia dimenticati di sopprimere le vecchie versioni. Con l’aumentare della complessità degli esperimenti Aczel ha preferito lasciare la parola ai relativi protagonisti, che hanno curato la stesura di alcune parti degli ultimi capitoli: così facendo però, ha indebolito non poco l’organicità e la coerenza del libro. Aczel non esita a sottolineare un aspetto epistemologico molto importante: la meccanica quantistica riesce a spiegare benissimo come si verifichino fenomeni apparentemente insoliti e inaspettati (almeno da un punto di vista classico), ma è stranamente taciturna sul perché, domanda legittima che però spesso risulta difficilmente soddisfacibile. Del resto, come ha detto giustamente Feynman, nessuno ha mai veramente capito la meccanica quantistica. Altrettanta enfasi, giustamente, c’è sullo spirito collaborativo che ha animato i principali fisici coinvolti nella verifica delle conseguenze del teorema di Bell: Shimony, Clauser, Horne, Aspect, Zeilinger, Mandel, Greenberger etc., tutti in qualche modo “entangled” fra loro, anche se provenienti da background piuttosto eterogenei. Il libro risulta piuttosto efficace nel far comprendere al lettore meno esperto l’impegno e la creatività necessarie ad effettuare una scoperta scientifica rilevante.La traduzione di Massimiliano Pagani è di buon livello, pur con qualche piccola svista: ottima la scelta di non tradurre il vocabolo portante e di inserire spesso gli equivalenti anglosassoni di sigle e termini tecnici. La bibliografia è particolarmente succinta, ma del resto il libro è pensato per un pubblico ampio e i riferimenti più specialistici sono disseminati nei vari capitoli. Interessante la collezione di foto (purtroppo quasi tutte in bianco e nero), mentre i numerosi diagrammi che rappresentano i vari esperimenti sono forse troppo naive per risultare davvero utili.Consigliato a chi vuole intrecciare il proprio destino a quello altrui.Sconsigliato ai seguaci del solipsismo.

  • Ergun Coruh
    2018-10-28 00:05

    I first came across the bizarre quantum phenomenon known as "Entanglement" while reading a book called The Large, the Small and the Human Mind by Roger Penrose, then I lost it at some point. In desperation I started to search other resources and found this book called ENTANGLEMENT: The Greatest Mystery in Physics by science author Amir Aczel. Aczel describes Quantum Entanglement as follows:"Entanglement is a superposition state of the states of two or more particles, taken as one system. Spatial separation as we know it seems to evaporate with respect to such system. Two particles that can be miles, or light years, apart may behave in a concerted way: what happens to one of them happens to the other one instantaneously, regardless of the distance between them. "Good book, served the purpose, certainly enhanced my understanding of Quantum Entanglement. However scientific flow was frequently disrupted by lengthy life stories of Physicists. Thereby the focus was lost and reading became excruciatingly hard -one wonders could this be more of a science history book rather than a book about Entanglement-. Also some of experiments weren't explained well despite pictures. 2.5 out of 5.

  • Bennett Coles
    2018-11-05 06:54

    Promising a discussion on one of the most fascinating topics in modern physics, this book disappoints. It takes the reader through the usual "history of modern physics" in order to set the stage, but then it just becomes a series of biographies of 20th century physicists who happened to work on the question of entanglement. Only in the last few pages does this book actually talk about the fact that entanglement has been proven as reality, and virtually no space is given to discussing what it might actually mean. Maybe I was just looking for something else, but this book unfortunately comes up very light on substance.

  • Sarah
    2018-11-17 01:00

    I have read more interesting and thorough explanations of entanglement, but this serves as a decent introduction to the phenomenon. Aczel never, ever should have described the physicists in question as being "entangled" with each other - way too cheesy and the meaning of the quantum phenomenon gets undermined. Any decent editor would have prevented such a thing. Also, it seems to me to be common knowledge that Grete Hermann called Neumann out for false assumptions before anyone else had the guts, or cleverness, to, and yet, she gets no mention in this book. That is a huge, unforgivable oversight.

  • Stephen Hackney
    2018-11-05 06:56

    Intellectually stimulating! I understood little of the subject matter, i.e., the 'entanglement phenomena' of quantum theory; but the author presented the material in such a way that I found the threads that bound the scientific/historical discovery of the concept of 'entanglement' in theoretical physics absolutely fascinating. I am a lay person, not at all versed in the fields of science or mathematics, yet I shall be reading additional works by Amir Aczel.

  • Jim
    2018-10-26 07:00

    A nice layman's guide following the study of entanglement . The authors obit. Died last month. http://www.nytimes.com/2015/12/08/sci...

  • Randal Samstag
    2018-10-27 02:52

    A book by a mathematician who has retired to writing popular books about mathematics and science. I got it out of the Seattle Public Library. A good popular introduction to the strange science of entanglement. Seek more and you will be even more puzzled.

  • Jason
    2018-11-06 04:11

    the world of the fast and the small is strange indeed and only a handful of scientific greats have really been able to delve down deep into what it all might mean. in the first half of the book, Aczel introduces the reader to them: Planck, Bohr, Schrödinger, de Broglie - the personalities behind the fabled "Thirty Years that Shook Physics" and the concepts that disquieted Einstein himself. the second half tells the story of the major research on quantum entanglement between then and now as well as touching on possible technologies that may emerge from that research in the future.Aczel, a scientist himself, keeps the speculation grounded in math and science. this is exactly what one should do when faced with a topic as heady as spooky action at a distance between entangled particles. even if the concept of entanglement itself remains elusive, the story of how we achieved any understanding at all of it is fascinating.

  • Kamarul Mansur
    2018-10-25 02:52

    Author starts his book with biographies of huge names of physicists, pioneers with their experiments and new discoveries in the world of physics. These are who has contributed to the search for particle entanglement. The author managed to explain what entanglement is from different view. Moving forward, the author talked about findings and experiments that in the end leads to the proof of particle entanglement. Although this book is more about the history of physics, some basic physics knowledge such as Young’s Experiments, Heisenberg Uncertainty Principle, the duality (particle / wave) needed before one is to dive his nose in this book by someone who is not familiar at all. But, don’t worry about having a slightest idea of it all. Do continue reading till the end because the author will discuss the actual meaning of this “spooky” Entanglement / quantum physics.

  • Nieves Delgado
    2018-10-31 04:02

    Buen libro de divulgación media; no es necesario ser un experto en cuántica pero sí tener unos conocimientos mínimos previos. Es muy detallado y riguroso a la hora de explicar la evolución histórica del descubrimiento del entrelazamiento y también en la exposición de los montajes experimentales involucrados en el proceso. Además, es sencillo de leer porque intercala pequeñas biografías y anécdotas sobre los científicos implicados y eso aligera un poco el peso narrativo que aportan los datos. Muy recomendable.

  • Tony
    2018-11-16 02:22

    I have rarely had such disparate opinions about different portions of a book. Entanglement's early chapters provide some of the best explanations I have ever encountered of the entanglement phenomena as well as some other quantum mechanical concepts. However, later sections of the book get bogged down in minutiae. The authors covers various experiments in far too much detail to hold my attention. By the end, I felt I knew all I wanted to know about entanglement . . . and quite a bit more.

  • Sarah Lloyd
    2018-11-07 03:17

    A very accessible introduction to quantum entanglement, this book had me laughing in places at the repeated Dad-jokes about people being entangled, and the section describing the ongoing battles between Bohr and Einstein was pretty exciting. Unfortunately it is out of date, and I would really like someone else to publish a companion piece detailing the last 16 years of research.

  • Charles Daney
    2018-10-27 05:53

    The author, one of my Facebook friends, died almost one year ago. This is one of his best books. Amir, like the fine science writer he was, covered a diversity of topics well – including my favorite, mathematics. I enjoyed his Fermat's Last Theorem: Unlocking the Secret of an Ancient Mathematical Problem, even though it's a bit short and superficial – and he confused elliptic curves and elliptic functions. (A common error.) I'm looking forward to reading My Search for Ramanujan: How I Learned to Count, which Amir co-authored with Ken Ono. Since Ono is a world-class expert on topics that interested Ramanujan, such as partition theory, their book should be excellent.Like all books Amir wrote himself, Entanglement is at an elementary level, intended for general readers. I think it does an excellent job with the subject matter. There are, however, better books on the subject of quantum entanglement for readers who are more conversant with quantum mechanics, such as Nicolas Gisin's Quantum Chance: Nonlocality, Teleportation and Other Quantum Marvels, which I reviewed here. Gisin led a group that performed a key experiment that verified the nonlocal character of quantum entanglement. That experiment receives a whole (short) chapter in Amir's book. But what may be the most noteworthy aspect of the book reviewed here is that it also describes several other very important experiments on entanglement, of which I don't know any other treatment at the elementary level. Among these is a fairly detailed treatment of "triple entanglement". That involves three entangled particles instead of the much more usual two. It's an important experiment, since it clearly demonstrates the inherent non-locality of quantum entanglement, without having to rely on Bell's Theorem.Amir's book starts out slowly and covers all the usual history of quantum mechanics, from Planck and Einstein onward. This includes the customary topics, such as the contributions of Bohr, Heisenberg, de Broglie, Schrödinger, von Neumann, Dirac, Bohm, and Wheeler. This early history occupies the first half of the book, so that readers who're already familiar with the history may become impatient to get to the more recent "good stuff".Erwin Schrödinger discovered the phenomenon of entanglement, and considered it the most significant aspect of quantum mechanics. He wrote "Entanglement is not one but rather the characteristic trait of quantum mechanics." Entanglement depends on another aspect of quantum mechanics, "superposition", which had been discovered earlier. The two terms should not be confused even though they are closely related. Superposition is the strange property that one or more quantum particles may have, in which the particles can actually be in multiple potentially observable simple states at the same time. (This property is what makes quantum computers possible and interesting.) Two particles that have interacted at one point in time can be in a joint state that is a superposition of states of both particles. In this case, the particles may be "entangled", so that a measurement of one particle will instantaneously determine what will be measured of the other particle, even if the two are millions of light-years apart when measured.Obviously, this is quite a peculiar phenomenon, and it sorely perplexed Einstein. Nevertheless, it has been rigorously verified numerous times since the 1970s. The details of many of these experiments occupy the second half of Amir's book. This part of the book requires much more careful reading than the first half, but it's well worth the effort. If one has any interest in learning about recent practical aspects of quantum technology – such as quantum computing, quantum cryptography, and quantum teleportation – these are the details that one needs to develop a good understanding of. A reader can feel confident of the book's accuracy in dealing with these topics, since the author spent quite a lot of time discussing the experiments with a number of physicists who actually performed them.

  • Tom Schulte
    2018-11-13 06:52

    This is a quick, easy read with an enlightening high-level overview of the mysteries and advances in understanding quantum entanglement. This works very well as a an audio book, despites some tables and formulae. On the science side, I do not recall knowing that the Heisenberg's uncertainty principle could be demonstrated not only in sub-nucleon particles like the photon, but even in neutrons and atoms themselves. Making this book interesting is the colorful scientists like Bohr, Heisenberg, Feynman, Dirac, etc. Einstein gets a lot of space and it is interesting to think in the WWI era he outmoded classical, Newtonian physics only to see

  • Wm Pope
    2018-10-29 05:11

    A reasonable introduction to quantum entanglement. The author tries to approach the material from several directions to make entanglement easier to understand. The book uses the people who have been involved with the topic to frame the different explanations. This helps understand that the space is evolving and the knowledge of entanglement is growing. I am not comfortable with the degree of assurance the author presents, not about entanglement itself, but about how entanglement fits into a larger cosmological scheme.The presentation on the limits of entanglement and why it can not be used for communication is good but would benefit from more and deeper explanations.Entanglement is a very quick read and worth the time. It will establish some familiarity with the topic and with the people who have historically been involved.

  • Kazi Yasin
    2018-11-17 02:58

    This is an excellent account of the formulation and evolution of quantum mechanics over the span of 100 years. The author describes all the major breakthroughs in the world of quantum physics starting from Planck's quantisation of energy levels to the modern experimentation of the triple entanglement of particles performed in the late 20th century. The author also starts each chapter with a brief introduction to the life of each famous physicist whose contributions were accounted for in this book. All major protagonists of this baffling theory- Einstein, Bohr, de Broglie, Heisenberg, Schrödinger, Bell, Clauser etc. have been portrayed in almost a dramatic fashion which makes it enjoyable to read unlike other scientific history accounts.

  • Lage von Dissen
    2018-11-14 04:54

    Quantum entanglement is a fascinating subject indeed. The implications of this phenomenon are far-reaching -- from unbreakable quantum encryption to teleportation. This among other quantum phenomena, left Einstein scratching his head. Either way, it serves as another piece of the puzzle towards finding a theory of everything (TOE). Trying to reconcile quantum mechanics with a theory of gravity is the current dilemma among scientists in the field, and this is but one finding to help fill in the blanks. I thought it was a good read, but would have preferred the book to go into more technical detail concerning its applications.

  • Kristenyque
    2018-10-22 22:59

    I didn't truly read this in one day. I read the majority of it though at the book store this morning. I was interested in the subject matter but the book (as it explains in the intro) tries (in multiple ways) to explain entanglement. I thought there was a lot of excess (although interesting), information about the scientists that worked on quantum mechanics. Since the topic is so heady and beyond me, I didn't absorb much about entanglement other than Feynman's diagram. A neat book, I wish I would have understood more.

  • Hendrick Mcdonald
    2018-10-25 07:18

    An okay introduction to entanglement, but get lost in the history and experimental setups. The first 2/3 rds of the book focuses on general quantum physics history: Planck, Einstein, Bohr, Heisenberg, Schrodinger, Pauli etc. I recommend A Graphic Guide to Quantum Physics for that. The coverage of entanglement itself goes through interesting experiments, but the interesting results and what they mean, how to interpret them, gets lost in explaining the history and setup to the experiments, without even doing a worthwhile job of describing what each part does. So, its eh.

  • Cara
    2018-10-29 04:08

    This book is light (very light) on the science and heavy on the history. Not a bad thing, but if you read this book hoping for some actual information about entanglement from a scientific viewpoint, you'll be disappointed. The first 80% of the book is a history of physics, told in short biographies of various physicists throughout the years. This is actually fairly interesting, so I can't complain too much.

  • Nick Gotch
    2018-10-20 06:04

    A decent review of quantum theory, it's development, the people who discovered it, and especially the experiments and the subject of quantum entanglement. I would *NOT* recommend this to an amateur of physics/quantum mechanics as it's definitely very heavy stuff, but if you are on that level it is solid. Some parts seem a little repetitive but that's part of what the author was going for (different perspectives on the same thing.)

  • Mauro
    2018-11-04 02:53

    Abbastanza piacevole da leggere, anche se tradisce un po' le attese. La maggior parte del testo racconta le vite degli scienziati che hanno lavorato sull'entanglement. La sensazione �� che conoscendo cos�� poco di questo fenomeno, ed essendo molto complesso per una divulgazione al pubblico, si sia cercato di semplificare e "rimpolpare" con le biografie.Non richiede conoscenza della matematica, anche se mette alla prova il senso della logica e dell'intuizione.

  • Irena
    2018-10-30 23:14

    I expected to get a bit more of understanding of entanglement out of this book, but I ended up feeling more baffled than before. Explanations of the actual experiments which supposedly proved this phenomenon lacked in details and lucidity. The parts I liked most about this book were related to biographical and anecdotal facts about the scientists entangled with the entanglement's discovery and research.

  • Abbey
    2018-11-02 00:19

    Somewhat similar to 'A short history of nearly everything' by Bryson. Stick with it to the end. He doesn't get to the 'spooky' entanglement until the veeery last chapter. Don't worry about understanding all the physics, that's not the author's intent. Really enjoyed learning about the different scientists and the steps they all took to lead to what we know today.

  • Stephen
    2018-11-16 04:12

    Interesting read up until the final quarter of the book. Then Aczel went haywire into describing experiments sans the mathematics nor the actual experimental setup and this book took a turn from five stars down to three. Unfortunate, but if pressed I'm afraid that I would not recommend this book.