n 1959, when Charles Percy Snow lamented the gap between natural sciences and humanities in his lecture "The Two Cultures and the Scientific Revolution" 1 , it was followed by persistent debates about the two cultures and many responses that attempted to find a mediation.Some scholars were looking for a third culture that could provide the missing link.One of them is John Brockman, who in 1995, -40 years after Snow's lecture -, announced popular sciences (that were continuously growing over the last decades) as the crucial synthesis.2 This does not seem out of place, considering the mass of new books about the development of natural sciences in the 20th century, written in a commonly comprehensible manner, that are published annually and see their second edition as soon as the second year.Popular scientists like Stephen Hawking, Brian Greene, John Gribbin and Paul Davies have long since been placed in the average home's bookcase and are definitely read by non-scientists.Meanwhile it is almost part of a successful career as a famous physicist to write a popular scientific book (which by the way is on no account a phenomenon of I
n 1959, when Charles Percy Snow lamented the gap between natural sciences and humanities in his lecture "The Two Cultures and the Scientific Revolution" 1 , it was followed by persistent debates about the two cultures and many responses that attempted to find a mediation.Some scholars were looking for a third culture that could provide the missing link.One of them is John Brockman, who in 1995, -40 years after Snow's lecture -, announced popular sciences (that were continuously growing over the last decades) as the crucial synthesis.2 This does not seem out of place, considering the mass of new books about the development of natural sciences in the 20th century, written in a commonly comprehensible manner, that are published annually and see their second edition as soon as the second year.Popular scientists like Stephen Hawking, Brian Greene, John Gribbin and Paul Davies have long since been placed in the average home's bookcase and are definitely read by non-scientists.Meanwhile it is almost part of a successful career as a famous physicist to write a popular scientific book (which by the way is on no account a phenomenon of I
Quantum theory, the most successful physical theory of all time, provoked intense debate between the twentieth century's two greatest physicists, Niels Bohr and Albert Einstein. Quantum information theory has emerged from intensive study of the structure and interpretation of quantum theory to become one of the fastest growing areas of twenty-first century science. This second edition has been extensively revised and updated to cover recent developments, including the findings of papers published since the well-received first edition. A substantial new chapter is devoted to the development and structure of quantum information theory. Developments in the experimental and theoretical study of Bell's Theorem are also covered in detail, and the accounts of ongoing work have been brought up to date. A fascinating account of the development of quantum theory, this book will appeal to anyone with an interest in the fundamental questions of physics, its philosophy and its history.
Introduction Chapter 1 dealt with one of the deepest mysteries in modern science: how to explain consciousness. This Part deals with another mystery: how to make sense of quantum mechanics. Both involve a problem of reconciliation with the classical worldview, which is one hint that the two mysteries might be related. A second is that, unlike classical physics, which makes no reference to or allowance for consciousness, quantum theory raises the issue of consciousness and its relationship to the physical world in a very direct way. These hints do not necessarily mean there is a connection between the two mysteries, but by the end of this Part I hope to have shown why it would be natural to look for one. My more immediate aim here is to give the social scientific reader an introductory understanding of the experimental findings of quantum theory, its key concepts, and the debates about its interpretation. The discussion assumes no prior knowledge of quantum physics and makes no use of mathematics. Quantum theory without equations might seem like an oxymoron, and certainly reading this Part will not enable anyone to use quantum theory. But to a perhaps surprising degree it is possible to understand quantum theory without being able to use it. Its findings can be communicated in ordinary language, and the same goes for its main concepts and interpretive debates. One consequence of this has been the emergence of a virtual cottage industry of books on quantum theory for a lay audience. Most are written by physicists, and many are quite good. However, it is not just popular treatments that do without equations: much of the professional philosophical literature does as well. (I draw on both kinds of literature below.) Philosophers of physics are trained to understand the math, of course, which is necessary for a full appreciation of the issues.
The quantum revolutions: from concepts to technology The development of quantum mechanics in the beginning of the twentieth century was a unique intellectual adventure, which obliged scientists and philosophers to change radically the concepts they used to describe the world. After these heroic efforts, it became possible to understand the stability of matter, the mechanical and thermal properties of materials, the interaction between radiation and matter, and many other properties of the microscopic world that had been impossible to understand with classical physics. A few decades later, that conceptual revolution enabled a technological revolution , at the root of our information-based society. It is indeed with the quantum mechanical understanding of the structure and properties of matter that physicists and engineers were able to invent and develop the transistor and the laser – two key technologies that now permit the high-bandwidth circulation of information, as well as many other scientific and commercial applications. After such an accumulation of conceptual – and eventually technological – successes, one might think that by 1960 all the interesting questions about quantum mechanics had been raised and answered. However, in his now-famous paper of 1964 – one of the most remarkable papers in the history of physics – John Bell drew the attention of physicists to the extraordinary features of entanglement: quantum mechanics describes a pair of entangled objects as a single global quantum system, impossible to be thought of as two individual objects, even if the two components are far apart.
2025 is the year UNESCO selected to celebrate 100 years of this novel science, quantum mechanics, based on Heisenberg’s “uncertainty principle” discovery. However, quantum mechanics began with the discovery of quantum packets of energy emission formulated by the German physicist Max Planck, and it incorporated additional discoveries and principles from Albert Einstein, Niels Bohr, Heisenberg, Pauli, de Broglie, and many others in the early 1900s. Since then, many advancements and breakthroughs have been made. Such scientific contributions have influenced the culture and technology of humanity from the 20th century onwards, with the first quantum revolutions bringing innovations in technology and engineering, including the omnipresent light amplification by stimulated emission of radiation (Laser), magnetic resonance imaging (MRI), microprocessor manufacturing and design for computers and nuclear energy. Thus, at the beginning of the Second Quantum Revolution in the 21st century, amid a new wave of novel quantum technologies promising to create the 5th Industrial Revolution and transform humanity, a brief history of these marvellous sciences is condensed, connecting the wonders of the new quantum technogenesis that is being forged, linking its past with classical mechanics and also with novel relativistic mechanics. Understanding these developments highlights the significance of quantum technologies shaping our future and what lies ahead for us. This article explores technologies that are presently under research and development (R&D) in the quantum physics realm, including quantum computing, quantum cryptography, quantum sensing and metrology, and quantum simulation. It also discusses emerging careers in the quantum field and the unresolved mysteries that continue to challenge scientists. The discussion follows the ancient griot tradition of storytelling, a method that the distinguished physicist, great professor, and Nobel laureate Richard Feynman encouraged us to use to explain complex scientific ideas.
Introductory Remarksuantum theory is a double-edged sword for secularity and scientism.1 On one side, quantum theory seems to validate science as the ultimate source of truth, reason, and human progress as it is one of the most successful, coherent, and prolific scientific theories.It is successful in the sense that its empirical verifiability has been consistently demonstrated to high degrees of precision, and it is also highly prolific in the sense that it has led to revolutionary advancements in other fields of science and has brought about important technological innovations which led to the computer age and the information age. 2 Moreover, quantum theory is coherent in the sense that its unified account of reality -of particles 3 Stephen M. Barr, "Faith and Quantum Theory," reprinted in The Best American Spiritual Writing 2008, ed.Philip Zaleski (Boston: Houghton Mifflin Company, 2008), 2.4 In this section, I conduct my reflections with a certain reconstructive picture of the developments in quantum theory in mind and this reconstruction is primarily based on the accounts of Kleppner and Jackiw, Barr, and Max Tegmark and John Archibald Wheeler, "100 Years of Quantum Mysteries," Scientific American, February 2001, 72-29.I cite other references in the appropriate junctures in the article.7 Tegmark and Wheeler, "100 Years of Quantum Mysteries," 77. 8 Barr, "Faith and Quantum Theory," 8-9. 9