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E-raamat: String Theory For Dummies

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  • Ilmumisaeg: 14-Jun-2022
  • Kirjastus: For Dummies
  • Keel: eng
  • ISBN-13: 9781119888987
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  • Formaat: PDF+DRM
  • Ilmumisaeg: 14-Jun-2022
  • Kirjastus: For Dummies
  • Keel: eng
  • ISBN-13: 9781119888987

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Unravel the secrets of the universe and untangle cutting-edge physics

Yes, you actually can understand quantum physics! String Theory For Dummies is a beginner’s guide, and we make it fun to find out about the all the recent trends and theories in physics, including the basics of string theory, with friendly explanations. Build a foundation of physics knowledge, understand the various string theories and the math behind them, and hear what the opponents to string theory have to say. It’s an exciting time to be alive in advanced physics, and this updated edition covers what’s new in the string world—the Large Hadron Collider, the Higgs Boson, gravitational waves, and lots of other big headlines. Unleash your inner armchair physicist with String Theory For Dummies.

  • Brush up on the basics of physics and the approachable math needed to understand string theory
  • Meet the scientists who discovered string theory and continue to make waves (and particles) in the physics world
  • Understand what it’s all about with real-world examples and explanations
  • Learn why string theory is called "The Theory of Everything"—and what it means for technology and the future

Aspiring scientists or life-long learners will both be able to gain valuable information from this book. This accessible intro into string theory is for the theorists inside anyone.

Introduction 1(4)
About This Book
1(1)
Foolish Assumptions
2(1)
Icons Used in This Book
3(1)
Beyond the Book
4(1)
Where to Go from Here
4(1)
Part 1: Introducing String Theory 5(40)
Chapter 1 So What Is String Theory Anyway?
7(14)
String Theory: Seeing What Vibrating Strings Can Tell Us about the Universe
8(3)
Using tiny and huge concepts to create a theory of everything
8(2)
A quick look at where string theory has been
10(1)
Introducing the Key Elements of String Theory
11(4)
Strings and branes
11(2)
Quantum gravity
13(1)
Unification of forces
13(1)
Supersymmetry
13(1)
Extra dimensions
14(1)
Understanding the Aim of String Theory
15(3)
Quantizing gravity
15(1)
Unifying forces
15(1)
Explaining matter and mass
16(1)
Defining space and time
17(1)
Appreciating the Theory's Amazing (and Controversial) Implications
18(1)
Landscape of possible theories
18(1)
The universe as a hologram
19(1)
Why Is String Theory So Important?
19(2)
Chapter 2 The Physics Road Dead-Ends at Quantum Gravity
21(14)
Understanding Two Schools of Thought on Gravity
22(3)
Newton's law of gravity: Gravity as force
22(2)
Einstein's law of gravity: Gravity as geometry
24(1)
Describing Matter: Physical and Energy-Filled
25(1)
Viewing matter classically: Chunks of stuff
25(1)
Viewing matter at a quantum scale: Chunks of energy
26(1)
Grasping for the Fundamental Forces of Physics
26(2)
Electromagnetism: Super-speedy energy waves
27(1)
Nuclear forces: What the strong force joins, the weak force tears apart
28(1)
Infinities: Why Einstein and the Quanta Don't Get Along
28(3)
Singularities: Bending gravity to the breaking point
29(1)
Quantum jitters: Space-time under a quantum microscope
30(1)
Unifying the Forces
31(4)
Einstein's failed quest to explain everything
32(1)
A particle of gravity: The graviton
32(1)
Supersymmetry's role in quantum gravity
33(2)
Chapter 3 Accomplishments and Failures of String Theory
35(10)
Celebrating String Theory's Successes
36(3)
Predicting gravity out of strings
36(1)
Explaining what happens to a black hole (sort of)
36(1)
Explaining quantum field theory using string theory
37(1)
String theory keeps making a comeback
38(1)
Being the most popular theory in town
38(1)
Considering String Theory's Setbacks
39(3)
The universe doesn't have enough particles
40(1)
Dark energy: The discovery string theory should have predicted
40(1)
Where did all these "fundamental" theories come from?
41(1)
Looking into String Theory's Future
42(5)
Theoretical complications: Can we figure out string theory?
43(1)
Experimental complications: Can we prove string theory?
43(2)
Part 2: The Physics Upon Which String Theory Is Built 45(116)
Chapter 4 Putting String Theory in Context: Understanding the Method of Science
47(14)
Exploring the Practice of Science
48(6)
The myth of the scientific method
48(2)
The need for experimental falsifiability
50(2)
The foundation of theory is mathematics
52(1)
The rule of simplicity
53(1)
The role of objectivity in science
53(1)
Understanding How Scientific Change Is Viewed
54(7)
Precision and accuracy: Science as measurement
54(1)
Old becomes new again: Science as revolution
55(1)
Combining forces: Science as unification
56(1)
What happens when you break it? Science as symmetry
57(4)
Chapter 5 What You Must Know about Classical Physics
61(20)
This Crazy Little Thing Called Physics
62(5)
No laughing matter: What we're made of
62(2)
Add a little energy: Why stuff happens
64(1)
Symmetry: Why some laws were made to be broken
65(2)
All Shook Up: Waves and Vibrations
67(4)
Catching the wave
67(2)
Getting some good vibrations
69(2)
Newton's Revolution: How Physics Was Born
71(4)
Force, mass, and acceleration: Putting objects into motion
72(1)
Gravity: A great discovery
73(1)
Optics: Shedding light on light's properties
74(1)
Calculus and mathematics: Enhancing scientific understanding
74(1)
The Forces of Light: Electricity and Magnetism
75(6)
Light as a wave: The ether theory
75(1)
Invisible lines of force: Electric and magnetic fields
76(2)
Maxwell's equations bring it all together: Electromagnetic waves
78(1)
Two dark clouds and the birth of modern physics
79(2)
Chapter 6 Revolutionizing Space and Time: Einstein's Relativity
81(20)
What Waves Light Waves? Searching for the Ether
82(2)
No Ether? No Problem: Introducing Special Relativity
84(5)
Unifying space and time
86(2)
Unifying mass and energy
88(1)
Changing Course: Introducing General Relativity
89(8)
Gravity as acceleration
89(2)
Gravity as geometry
91(2)
Testing general relativity
93(3)
Surfing the gravitational waves
96(1)
Applying Einstein's Work to the Mysteries of the Universe
97(1)
Kaluza-Klein Theory - String Theory's Predecessor
98(3)
Chapter 7 Brushing Up on Quantum Theory Basics
101(18)
Unlocking the First Quanta: The Birth of Quantum Physics
102(2)
Fun with Photons: Einstein's Nobel Idea of Light
104(3)
Waves and Particles Living Together
107(4)
Light as a wave: The double slit experiment
107(1)
Particles as a wave: The de Broglie hypothesis
108(2)
Quantum physics to the rescue: The quantum wavefunction
110(1)
Why We Can't Measure It All: The Uncertainty Principle
111(1)
Dead Cats, Live Cats, and Probability in Quantum Physics
112(2)
Does Anyone Know What Quantum Theory Means?
114(1)
Quantum Units of Nature: Planck Units
115(4)
Chapter 8 The Standard Model of Particle Physics
119(22)
Atoms, Atoms, Everywhere Atoms: Introducing Atomic Theory
120(2)
Popping Open the Atomic Hood and Seeing What's Inside
122(3)
Discovering the electron
122(1)
The nucleus is the thing in the middle
123(1)
Watching the dance inside an atom
124(1)
The Quantum Picture of the Photon: Quantum Electrodynamics
125(5)
Dr. Feynman's doodles explain how particles exchange information
125(3)
Discovering that other kind of matter: Antimatter
128(1)
Sometimes a particle is only virtual
129(1)
Digging into the Nucleus: Quantum Chromodynamics
130(2)
The pieces that make up the nucleus: Nucleons
130(1)
The pieces that make up the nucleon's parts: Quarks
131(1)
Looking into the Types of Particles
132(2)
Particles of force: Bosons
132(1)
Particles of matter: Fermions
133(1)
Gauge Bosons: Particles Holding Other Particles Together
134(1)
Exploring the Theory of Where Mass Comes From
135(2)
What is the Higgs field?
136(1)
Discovering the Higgs boson at the LHC
137(1)
From Big to Small: The Hierarchy Problem in Physics
137(4)
Chapter 9 Physics in Space: Considering Cosmology and Astrophysics
141(20)
The Enlightened Universe and the Birth of Modern Astrophysics
143(2)
Everything doesn't revolve around Earth
143(1)
Beholding the movements of heavenly bodies
144(1)
Introducing the Idea of an Expanding Universe
145(3)
Discovering that energy and pressure have gravity
145(2)
Hubble drives it home
147(1)
Finding a Beginning: The Big Bang Theory
148(4)
Going to bat for the big bang: Cosmic microwave background radiation
149(2)
Understanding where the chemical elements came from
151(1)
Using Inflation to Solve the Universe's Problems of Flatness and Horizon
152(3)
The universe's issues: Too far and too flat
153(1)
Rapid expansion early on holds the solutions
154(1)
Dark Matter: The Source of Extra Gravity
155(1)
Dark Energy: Pushing the Universe Apart
155(3)
Stretching the Fabric of Space-Time into a Black Hole
158(5)
What goes on inside a black hole?
158(1)
What goes on at the edge of a black hole?
159(2)
Part 3: Building String Theory: A Theory Of Everything 161(100)
Chapter 10 Early Strings and Superstrings: Unearthing the Theory's Beginnings
163(24)
Bosonic String Theory: The First String Theory
164(4)
Explaining the scattering of particles with early dual resonance models
164(2)
Exploring the first physical model: Particles as strings
166(1)
Bosonic string theory loses out to the Standard Model
167(1)
Why Bosonic String Theory Doesn't Describe Our Universe
168(5)
Massless particles
169(1)
Tachyons
169(1)
No electrons allowed
170(1)
25 space dimensions, plus 1 of time
171(2)
Supersymmetry Saves the Day: Superstring Theory
173(4)
Fermions and bosons coexist...sort of
173(1)
Double your particle fun: Supersymmetry hypothesizes superpartners
174(2)
Some problems get fixed, but the dimension problem remains
176(1)
Supersymmetry and Quantum Gravity in the Disco Era
177(3)
The graviton is found hiding in string theory
177(2)
The other supersymmetric gravity theory: Supergravity
179(1)
String theorists don't get no respect
179(1)
A Theory of Everything: The First Superstring Revolution
180(1)
But We've Got Five Theories
181(2)
Type I string theory
182(1)
Type IIA string theory
182(1)
Type IIB string theory
182(1)
Two strings in one: Heterotic strings
182(1)
How to Fold Space: Introducing Calabi-Yau Manifolds
183(2)
String Theory Loses Steam
185(2)
Chapter 11 M-Theory and Beyond: Bringing String Theory Together
187(16)
Introducing the Unifying Theory: M-Theory
187(7)
Translating one string theory into another: Duality
188(4)
Using two dualities to unite five superstring theories
192(1)
The second superstring revolution begins: Connecting to the 11-dimensional theory
193(1)
Branes: Stretching Out a String
194(6)
The discovery of D-branes: Giving open strings something to hold on to
195(1)
Creating particles from p-branes
196(1)
Deducing that branes are required by M-theory
197(1)
Uniting D-branes and p-branes into one type of brane
198(1)
Using branes to explain black holes
199(1)
Getting stuck on a brane: Brane worlds
200(1)
Matrix Theory as a Potential M-Theory
200(3)
Chapter 12 Exploring Strings and Their Landscape
203(14)
Strings and Fields: String Field Theory
203(5)
Splitting and joining of strings and how to avoid infinities
204(2)
Trying to visualize how strings create loops
206(2)
String Theory Gets Surprised by Dark Energy
208(1)
Considering Proposals for Why Dimensions Sometimes Uncurl
209(2)
Measurable dimensions
209(1)
Infinite dimensions: Randall-Sundrum models
210(1)
Understanding the Current Landscape: A Multitude of Theories
211(6)
The anthropic principle requires observers
212(2)
Disagreeing about the principle's value
214(3)
Chapter 13 Gaining Insights from the Holographic Principle
217(20)
What's a Hologram?
217(5)
Creating optical holograms
218(1)
More bang for your buck: Encoding information in fewer dimensions
219(3)
Using Holograms to Understand Black Holes
222(4)
Going down a black hole
222(1)
Black holes and entropy
223(1)
If it works for black holes, it works for me
224(2)
Considering AdS/CFT Correspondence
226(7)
Checking the predictions
227(1)
AdS space, or living in an M. C. Escher painting
227(4)
CFTs: conformal, but nonconformist
231(1)
Understanding quantum gravity through AdS/CFT correspondence
232(1)
Turning the Tables: Using Holography to Study Strongly Interacting Matter
233(4)
The force is strong when using AdS/CFT
233(2)
Cooking up a soup of quarks and gluons
235(2)
Chapter 14 Putting String Theory to the Test
237(24)
Understanding the Obstacles
238(2)
Testing an incomplete theory with indistinct predictions
238(1)
Testing versus proof
239(1)
Analyzing Supersymmetry
240(2)
Finding the missing sparticles
240(1)
Testing implications of supersymmetry
241(1)
Testing Gravity from Extra Dimensions
242(2)
Checking the inverse-square law
242(1)
Searching for gravity waves to understand inflation
243(1)
Disproving String Theory Sounds Easier Than It Is
244(3)
Violating relativity
244(1)
Could proton decay spell disaster?
245(1)
Seeking mathematical inconsistencies
246(1)
Bootstrapping Our Way into String Theory
247(1)
Looking for Evidence in the Cosmic Laboratory: Exploring the Universe
248(6)
Using outer space rays to amplify small events
249(3)
Analyzing dark matter and dark energy
252(1)
Detecting cosmic superstrings
253(1)
Looking for Evidence Closer to Home: Using Particle Accelerators
254(2)
Accelerating heavy ions at the RHIC
254(1)
Colliders of the future
255(1)
LHC finds a boson, but no superpartners yet
256(7)
Discovering the Higgs boson
257(1)
Looking for superpartners
258(3)
Part 4: The Unseen Cosmos: String Theory On The Boundaries Of Knowledge 261(56)
Chapter 15 Making Space for Extra Dimensions
263(16)
What Are Dimensions?
264(1)
2-Dimensional Space: Exploring the Geometry of Flatland
265(2)
Euclidean geometry: Think back to high school geometry
265(1)
Cartesian geometry: Merging algebra and Euclidean geometry
266(1)
Three Dimensions of Space
267(5)
A straight line in space: Vectors
267(1)
Twisting 2-dimensional space in three dimensions: The Mobius strip
268(2)
More twists in three dimensions: Non-Euclidean geometry
270(2)
Four Dimensions of Space-Time
272(1)
Adding More Dimensions to Make a Theory Work
273(1)
Sending Space and Time on a Bender
274(1)
Are Extra Dimensions Really Necessary?
275(4)
Offering an alternative to multiple dimensions
276(1)
Weighing fewer dimensions against simpler equations
277(2)
Chapter 16 Our Universe - String Theory, Cosmology, and Astrophysics
279(18)
The Start of the Universe with String Theory
280(6)
What was before the bang?
280(2)
What banged?
282(4)
Explaining Black Holes with String Theory
286(3)
String theory and the thermodynamics of a black hole
286(2)
String theory and the black hole information paradox
288(1)
The Evolution of the Universe
289(4)
The swelling continues: Eternal inflation
289(2)
The hidden matter and energy
291(2)
The Undiscovered Country: The Future of the Cosmos
293(1)
A universe of ice: The big freeze
293(1)
From point to point: The big crunch
294(1)
A new beginning: The big bounce
294(1)
Exploring a Finely Tuned Universe
294(3)
Chapter 17 Have Time, Will Travel
297(20)
Temporal Mechanics 101: How Time Flies
298(5)
The arrow of time: A one-way ticket
298(1)
Relativity, worldlines, and worldsheets: Moving through space-time
299(3)
Hawking's chronology protection conjecture: You're not going anywhere
302(1)
Slowing Time to a Standstill with Relativity
303(2)
Time dilation: Sometimes even the best watches run slow
303(1)
Black hole event horizons: An extra-slow version of slow motion
304(1)
General Relativity and Wormholes: Doorways in Space and Time
305(5)
Taking a shortcut through space and time with a wormhole
306(2)
Overcoming a wormhole's instability with negative energy
308(2)
Crossing Cosmic Strings to Allow Time Travel
310(1)
A Two-Timing Science: String Theory Makes More Time Dimensions Possible
310(3)
Adding a new time dimension
311(1)
Reflecting two-time physics onto a one-time universe
311(1)
Does two-time physics have any real applications?
312(1)
Sending Messages through Time
313(4)
Part 5: What The Other Guys Say: Criticisms And Alternatives 317(48)
Chapter 18 Taking a Closer Look at the String Theory Controversy
319(20)
The String Wars: Outlining the Arguments
320(4)
50 years and counting: Framing the debate from the skeptic's point of view
321(2)
A rise of criticisms
323(1)
Is String Theory Scientific?
324(5)
Argument No. 1: String theory explains nothing
324(1)
Argument No. 2: String theory explains too much
325(4)
Turning a Critical Eye on String Theorists
329(3)
Hundreds of physicists just can't be wrong
329(2)
Holding the keys to the academic kingdom
331(1)
Does String Theory Describe Our Universe?
332(3)
Making sense of extra dimensions
333(1)
Space-time should be fluid
333(1)
The ever-elusive superpartners
334(1)
How finite is string theory?
335(1)
A String Theory Rebuttal
335(2)
What about the extra dimensions?
336(1)
Space-time fluidity?
337(1)
Does string theory need to be finite?
337(1)
Trying to Make Sense of the Controversy
337(2)
Chapter 19 Loop Quantum Gravity: String Theory's Biggest Competitor
339(10)
Taking the Loop: Introducing Another Road to Quantum Gravity
340(3)
The great background debate
340(1)
What is looping anyway?
341(2)
Making Predictions with Loop Quantum Gravity
343(1)
Gravity exists (Duh!)
343(1)
Black holes contain only so much space
343(1)
Gamma ray burst radiation travels at different speeds
344(1)
Finding Favor and Flaw with Loop Quantum Gravity
344(2)
The benefit of a finite theorem
344(1)
Spending some time focusing on the flaws
345(1)
So Are These Two Theories the Same with Different Names?
346(3)
Chapter 20 Considering Other Ways to Explain the Universe
349(16)
Taking Other Roads to Quantum Gravity
350(4)
CDT: If you've got the time, I've got the space
351(1)
Quantum Einstein gravity: Too small to tug
352(1)
Quantum graphity: Disconnecting nodes
352(1)
Tensor models: gluing the space-time together
353(1)
Newton and Einstein Don't Make All the Rules: Modifying the Law of Gravity
354(6)
DSR: Twice as many limits as ordinary relativity
355(1)
MOND: Disregarding dark matter
355(1)
VSL: Light used to travel even faster
356(2)
MOG: The bigger the distance, the greater the gravity
358(1)
Massive gravity and bimetric theory: making the graviton heavy
359(1)
Rewriting the Math Books and Physics Books at the Same Time
360(3)
Compute this: Quantum information theory
360(1)
Looking at relationships: Twistor theory
361(1)
Uniting mathematical systems: Noncommutative geometry
362(1)
Mathematics All the Way Down: Are We Living in a Simulation?
363(2)
Part 6: The Part Of Tens 365(8)
Chapter 21 Ten Tests for a Theory of Quantum Gravity
367(6)
Reproduce Gravity
368(1)
Compute Quantum Corrections
368(1)
Describe How Gravity and Matter Interact
368(1)
Explain Inflation
369(1)
Explain What Happens When Someone Enters a Black Hole
369(1)
Explain Whether Singularities Are Allowed
369(1)
Explain the Birth and Death of Black Holes
370(1)
Explain the Holographic Principle
370(1)
Provide Testable Predictions
371(1)
Describe Its Own Limitations
371(2)
Index 373
Andrew Zimmerman Jones, PhD, is the physics guide at About.com, where he writes lessons and explanations for common physics problems and questions. Andrew earned his degree in physics from Wabash College and his PhD in mathematics from Purdue University. He is the author of the previous edition of String Theory For Dummies.

Alessandro Sfondrini is a theoretical physicist. He obtained his bachelors and masters degrees in physics from the University of Padova. He is currently a Rita Levi-Montalcini Fellow and assistant professor in theoretical physics and mathematical methods and models at the University of Padova, as well as a member and IBM Einstein Fellow at the Institute for Advanced Study in Princeton, New Jersey.