
Quantum Computing from Colossus to Qubits
Description
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The quantum computer is no longer the stuff of science fiction. Pioneering physicists are on the brink of unlocking a new quantum universe which provides a better representation of reality than our everyday experiences and common sense ever could. The birth of quantum computers - which, like Schrödinger's famous "dead and alive" cat, rely on entities like electrons, photons, or atoms existing in two states at the same time - is set to turn the computing world on its head. In his fascinating study of this cutting-edge technology, and featuring a new introduction, John Gribbin explores the nature of quantum reality, arguing for a universe of many parallel worlds where "everything is real." Looking back to Alan Turing's work on the Enigma machine and the first electronic computer, Gribbin explains how quantum theory developed to make quantum computers work in practice as well as in principle. He takes us beyond the arena of theoretical physics to explore their practical applications - from machines which learn through "intuition" and trial and error to unhackable laptops and smartphones. And he investigates the potential for this extraordinary science to create a world where communication occurs faster than light and teleportation is possible. This is an exciting insider's look at the new frontier of computer science and its revolutionary implications.
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Content
- Intro
- Half Title
- Title
- Copyright
- Contents
- Acknowledgments
- Foreword to the Paperback Edition
- Introduction: Computing with Quantum Cats, Introduction to Original Hardback Edition
- PART ONE: COMPUTING
- 1 Turing and the Machine
- A Child of Empire
- Sherborne
- Cambridge . . .
- and Princeton
- Bletchley and the Bombe
- The Flowering of Colossus
- Anticlimax: After Bletchley
- 2 Von Neumann and the Machines
- Jancsi
- Johnny and the Institute
- Johnny and the Bomb
- The American Heritage
- A German Diversion
- The Second Strand
- ENIAC
- Von Neumann Picks Up the Ball
- Self-Replicating Robots
- First Interlude: Classical Limits
- PART TWO: QUANTA
- 3 Feynman and the Quantum
- MIT
- From Princeton to Los Alamos
- Schrödinger and His Equation
- The Experiment with Two Holes
- Integrating History
- A PhD with a Principle
- Cats Don't Collapse
- The Gateway to Quantum Computation
- Fredkin, Feynman and Friends
- 4 Bell and the Tangled Web
- Dropping the Pilot
- Von Neumann Gets It Wrong
- Spooky Action at a Distance
- Bohm Does the Impossible
- From Belfast to Bohm, and Beyond
- Von Neumann's Silly Mistake and Bell's Inequality
- First Fruits
- Closing the Loophole
- Second Interlude: Quantum Limits
- PART THREE: COMPUTING WITH QUANTA
- 5 Deutsch and the Multiverse
- Everett Sets the Scene
- Solving the Measurement Problem
- The Worlds of Deutsch
- A Measure of Universes
- The Good: Cracking Codes Conveniently
- The Bad: Limits of Quantum Computation
- The Ugly: Making It Work
- 6 Turing's Heirs and the Quantum Machines
- The Key Criteria
- Josephson and the Junction
- Leggett and the SQUID
- Computing with SQUIDs
- Corralling with Quantum Dots
- The Nuclear Option
- The Nuts and Bolts of NMR
- Trapped Ions Take a Bow
- The Teleportation Tango
- Fun with Photons
- Coda: A Quantum of Discord
- Notes
- Sources and Further Reading
- Picture Acknowledgments
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