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Decisive Moments in Quantum Mechanics
Decisive Moments in Quantum Mechanics
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Book Introduction
The 'Life Lessons' series, a time to add wisdom to your life.
“The definitive edition of quantum mechanics, vividly recording every moment of the quantum war!”


All the essential knowledge you need for life is gathered together! The 34th book in the "Life Lessons" series, a fascinating knowledge experience presented by Korea's leading professors, has been published.
The Life Lectures series, which transcribes the lectures of the best professors in various fields from universities across the country, including history, philosophy, science, medicine, and art, into books, provides readers with useful knowledge to live today and insight to look forward to tomorrow.
It is a knowledge and culture brand that allows you to encounter the best knowledge content in everyday life through not only books but also online lectures, YouTube, and podcasts.


"Decisive Moments in Quantum Mechanics" is a popular science textbook that celebrates the 100th anniversary of the birth of quantum mechanics and unravels the still unfamiliar and difficult field of quantum mechanics within the fascinating flow of scientific history.
The author vividly illuminates how quantum mechanics was formed and developed, focusing on the great turning points that changed the landscape of physics.
From Planck's hypothesis and Bohr's atomic model to the debate between Einstein and Bohr and the mystery of quantum entanglement, it explains the core concepts of quantum mechanics in an easy-to-understand manner, and broadly illuminates the Nobel Prize-winning research in physics and the future that quantum computers will open.
By following the invisible laws of the microscopic world, you will experience an intellectual exploration that will bring you one step closer to understanding the fundamental principles of the universe.
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index
Prologue | From Newtonian to Quantum Thinking
Main characters

Part 1 | Puzzles Thrown by Light
Secrets Hidden in Barcodes
The devil is in the details
Savior Planck

Part 2 | Are you a particle or a wave?
To be a particle or a wave, that is the question!
Indisputable evidence that waves are particles
Indisputable evidence that particles are waves

Part 3 | The Precision Machine Called the Atom
Atoms that resemble the solar system
Bohr's atom
Spatial quantization?

Part 4 | The Encounter of Waves and Dynamics
What is a wave?
Particles made of waves
Schrödinger equation

Part 5 | The Mysterious Wave Mechanics
Probabilistic existence
Particles that behave like waves
Superposition and observation

Part 6 | Nothing is certain in this world!
To measure precisely
To get one, you have to give up one.
Copenhagen interpretation

Part 7 | Do Electrons Rotate?
Atoms are magnets
2 people per room
Spin

Part 8 | Quantum War
Battle of Solvay
nested cats
Paradoxes of a Tangled World

Part 9 | For Whom the Bell Tolls?
Bell, a believer in quantum mechanics of spring
Bell's inequality looks complicated but is actually quite simple.
Experimenting with quantum entanglement

Part 10 | The Wide Open Quantum World
This is something a ghost would cry about
The Wizard of Entanglement
Is quantum computing possible?

A chronology of 100 years of quantum mechanics
References

Detailed image
Detailed Image 1

Into the book
Superposition and entanglement, once considered classic concepts, have become core concepts, and the public is eager for an explanation of the 2022 Nobel Prize in Physics.
(...) In that sense, this book can be said to be a 'shortcut to quantum entanglement' that contains only the minimum quantum mechanics knowledge necessary to understand quantum entanglement.
The intention of this writing was to focus on and cover in detail only the concepts essential for studying quantum entanglement.
--- p.10~11

This year, 2025, marks the 100th anniversary of the discovery of quantum mechanics by Heisenberg and Schrödinger.
To commemorate this, the United Nations designated 2025 as the International Year of Quantum Science and Technology.
This June, the 100th anniversary of quantum mechanics will be celebrated on Helgoland Island, where Heisenberg first conceived of matrix mechanics.
In Korea, the Korean Physical Society is also preparing an event to commemorate the 100th anniversary of the birth of quantum mechanics.
I hope that this book will serve as a refreshing sip of water to quench the thirst of readers curious about quantum mechanics and quantum entanglement.
--- p.11

At the beginning of the 20th century, Max Planck introduced the concept of 'quantum' to explain the radiation spectrum of matter that could not be understood by classical mechanics.
This proclaimed that the micro world operates in a completely different way from the macro world.
Planck's quantum theory led to the birth of quantum mechanics.
From solar cells and semiconductors to lasers, atomic clocks, and even GPS systems, quantum mechanics has become the seed of modern scientific and technological civilization.
--- p.24

“Are you a particle or a wave?” This is actually a nonsensical question.
Whether it is a particle or a wave is what humans have seen in the macroscopic world, and electrons do not necessarily have to have the shape of a billiard ball or a wave in the macroscopic world.
Ultimately, the question of 'is it a particle or a wave?' is nothing more than a false notion that we insist on dividing into one or the other.
We are caught up in the so-called 'obsession' of having to divide nutrients.
(...) Therefore, the idea of ​​dividing humans into dichotomies is a foolish question, like asking, 'Are they particles or waves?'
If you look at humans from a quantum mechanical perspective, you will find peace of mind.
--- p.72~73

Einstein, who won the Nobel Prize for his quantum theory of light, was a major contributor to the early construction of quantum theory.
However, he was skeptical about the probabilistic interpretation of quantum mechanics, and above all, he could not accept the indeterminacy and nonlocality of quantum mechanics.
The debate between Einstein and Bohr over quantum mechanics is still remembered today as a famous scene in the history of science and continues to inspire many physicists.
Ironically, Einstein's criticism served as an opportunity to further solidify the theoretical foundation of quantum mechanics, and it also enhanced the practical value of quantum mechanics by facilitating experimental verification of quantum entanglement.
--- p.210

Bell's inequality opens the way to testing the nonlocality of quantum mechanics.
The time was approaching when the outcome of the long quantum war over the Copenhagen interpretation would be decided.
The 2022 Nobel Prize winners in Physics were the main players in leading this war.
Their experiments have once again proven that quantum mechanics is a theory that works differently from human intuition.
But at the same time, humanity will be able to enter a new era of civilization that was unthinkable in the past.
The era of quantum technology has just opened.
--- p.278

Publisher's Review
“From the birth of quantum mechanics to today when quantum computers became a reality,
“The wondrous drama of the quantum world unfolds!”

The 2022 Nobel Prize in Physics was awarded to three physicists for experimentally demonstrating the phenomenon of quantum entanglement and linking it to real-world technologies such as quantum computers and quantum communications, sparking a surge in public interest in quantum technology and information science.
Although the term 'quantum' has been frequently mentioned in various fields since then, the precise understanding of its core concepts is often lacking or fragmented.
In particular, quantum entanglement is a complex and counterintuitive concept, which leaves a lot of room for misunderstanding. Therefore, there are some basic theories that must be covered to properly understand it.
Against this backdrop, 『Decisive Moments in Quantum Mechanics』 was planned to organize the flow by selecting only the essential concepts centered on the topic of quantum entanglement.
Professor In-Kyu Park, who is participating in international joint research at CERN, the world's largest particle physics research institute, has earned public trust as "the scientist who explains quantum mechanics most easily," with his quantum mechanics lectures on the knowledge YouTube channel "Understanding" having accumulated over 1 million views.
Based on the approach and understanding system accumulated through lectures and research, rather than explaining all the complex theories, the book carefully selects and includes essential concepts and turning points centered around the core topic of "quantum entanglement." It also includes explanations of the historical development and actual experiments, making it easy for anyone to follow the flow.
In particular, the fierce debate between Einstein, who claimed that “God does not play dice,” and Bohr, who responded by saying, “Don’t tell God what to do,” is introduced as the most fundamental turning point in quantum mechanics and a symbolic moment that will remain in the history of human science.
The latter part of the book details the scientific proof of quantum mechanics' nonlocality, from the EPR paradox to Bell's inequality and quantum entanglement experiments, and provides a broad overview of how the research of the 2022 Nobel Prize in Physics leads to quantum information science and computing.
By following the decisive moments of quantum mechanics that completely changed the paradigm of human intellectual history in the 20th century, readers will be able to experience firsthand how the "power of quantum thinking" is influencing today's worldview and technology.

“Planck, Einstein, Bohr, Heisenberg, Schrödinger…
“A record of the great discoveries of the masters who illuminated the 100-year history of quantum mechanics.”

"Decisive Moments in Quantum Mechanics" is structured so that readers who have a vague sense of difficulty with quantum mechanics, as well as those who have some experience with the concept but struggle to grasp the flow, can naturally follow the content and understand the core concepts.
The "Main Characters" section at the beginning of the book concisely summarizes the key achievements and ideas of the scientists who led the development of quantum mechanics, providing background information necessary to understand the main text.
The last part of the book includes a '100-Year Timeline of Quantum Mechanics', which organizes the flow of time from Planck's quantization hypothesis to the Nobel Prize-winning research of 2022, allowing readers to see the development of major theories and experiments at a glance.

Focusing on the core theme of modern physics—quantum entanglement—and organizing the concepts and turning points essential to understanding it, "Decisive Moments in Quantum Mechanics" will serve as a reliable guide for readers seeking to explore the invisible microscopic world and approach the wondrous secrets of the universe step by step.

"Life's Great Lectures," a knowledge-sharing project by Korea's top professors.
Life Lectures is a series that compiles lectures by renowned professors from universities across the country, and is a sister brand of 'Seogamyeonggang (famous lectures you can listen to without going to Seoul National University),' which compiles lectures by Seoul National University professors.
Lectures by Korea's leading scholars have been reconstructed into useful knowledge content for our lives, making them readily available not only through books but also through online lectures, YouTube, podcasts, and Instagram.
This course provides an opportunity for professionals seeking wisdom in their work, at home, and in interpersonal relationships, young people contemplating their career path, and everyone in need of solutions at every critical juncture in life to easily watch, listen to, and learn from renowned lectures delivered by leading experts in their respective fields.
GOODS SPECIFICS
- Date of issue: June 11, 2025
- Format: Hardcover book binding method guide
- Page count, weight, size: 308 pages | 478g | 134*194*23mm
- ISBN13: 9791173572692
- ISBN10: 1173572694

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