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Part I Basic Concepts in Quantum Information Theory |
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1 Correlation and Entanglement |
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3 | (34) |
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3 | (1) |
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1.2 Correlations in Classical Probability Theory |
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4 | (9) |
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1.2.1 Joint Probability Without Correlations |
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5 | (3) |
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1.2.2 Correlation Functions |
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8 | (2) |
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10 | (3) |
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13 | (13) |
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1.3.1 Pure and Mixed Quantum States |
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13 | (4) |
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1.3.2 Composite Quantum Systems and Tensor Product Structure |
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17 | (2) |
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1.3.3 Pure Bipartite State, Schmidt Decomposition |
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19 | (2) |
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1.3.4 Mixed Bipartite State |
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21 | (1) |
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1.3.5 Bell's Inequalities |
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22 | (1) |
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23 | (3) |
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1.4 Correlation and Entanglement in Many-Body Quantum Systems |
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26 | (7) |
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27 | (1) |
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1.4.2 Many-Body Correlation |
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28 | (3) |
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1.4.3 Many-Body Entanglement |
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31 | (2) |
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1.5 Summary and Further Reading |
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33 | (1) |
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34 | (3) |
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2 Evolution of Quantum Systems |
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37 | (26) |
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37 | (2) |
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39 | (7) |
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2.2.1 Single Qubit Unitary |
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39 | (2) |
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41 | (2) |
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43 | (3) |
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46 | (4) |
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50 | (2) |
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52 | (7) |
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52 | (2) |
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2.5.2 Master Equations for a Single Qubit |
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54 | (5) |
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2.6 Summary and Further Reading |
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59 | (2) |
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61 | (2) |
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3 Quantum Error-Correcting Codes |
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63 | (22) |
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63 | (1) |
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3.2 Basic Idea of Error Correction |
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64 | (5) |
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64 | (3) |
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67 | (1) |
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68 | (1) |
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3.3 Quantum Error-Correcting Criteria, Code Distance |
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69 | (3) |
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3.4 The Stabilizer Formalism |
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72 | (6) |
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73 | (3) |
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3.4.2 The Stabilizer Formalism |
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76 | (1) |
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3.4.3 Stabilizer States and Graph States |
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77 | (1) |
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78 | (2) |
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3.6 Summary and Further Reading |
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80 | (2) |
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82 | (3) |
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Part II Local Hamiltonians, Ground States, and Many-Body Entanglement |
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4 Local Hamiltonians and Ground States |
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85 | (30) |
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85 | (3) |
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4.2 Many-Body Hilbert Space |
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88 | (1) |
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89 | (3) |
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90 | (1) |
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4.3.2 The Effect of Locality |
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91 | (1) |
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4.4 Ground-State Energy of Local Hamiltonians |
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92 | (12) |
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4.4.1 The Local Hamiltonian Problem |
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93 | (2) |
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4.4.2 The Quantum Marginal Problem |
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95 | (4) |
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4.4.3 The N-Representability Problem |
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99 | (1) |
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4.4.4 De Finetti Theorem and Mean-Field Bosonic Systems |
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100 | (4) |
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4.5 Frustration-Free Hamiltonians |
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104 | (6) |
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4.5.1 Examples of Frustration-Free Hamiltonians |
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104 | (2) |
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4.5.2 The Frustration-Free Hamiltonians Problem |
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106 | (1) |
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4.5.3 The 2-Local Frustration-Free Hamiltonians |
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107 | (3) |
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4.6 Summary and Further Reading |
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110 | (2) |
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112 | (3) |
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5 Gapped Quantum Systems and Entanglement Area Law |
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115 | (42) |
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115 | (2) |
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5.2 Quantum Many-Body Systems |
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117 | (6) |
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5.2.1 Dimensionality and Locality |
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117 | (1) |
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5.2.2 Thermodynamic Limit and Universality |
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118 | (1) |
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118 | (2) |
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120 | (2) |
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122 | (1) |
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5.3 Entanglement Area Law in Gapped Systems |
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123 | (6) |
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5.3.1 Entanglement Area Law |
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123 | (2) |
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5.3.2 Topological Entanglement Entropy |
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125 | (4) |
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5.4 Generalizations of Topological Entanglement Entropy |
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129 | (17) |
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5.4.1 Quantum Conditional Mutual Information |
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129 | (3) |
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5.4.2 Toric Code in a Magnetic Field |
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132 | (4) |
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5.4.3 The Transverse-Field Ising Model |
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136 | (3) |
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5.4.4 The Transverse-Field Cluster Model |
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139 | (4) |
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5.4.5 Systems with Mixed Orders |
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143 | (1) |
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5.4.6 I(A:C\B) as a Detector of Nontrivial Many-Body Entanglement |
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143 | (3) |
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5.5 Gapped Ground States as Quantum Error-Correcting Codes |
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146 | (2) |
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5.6 Entanglement in Gapless Systems |
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148 | (2) |
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5.7 Summary and Further Reading |
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150 | (2) |
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152 | (5) |
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Part III Topological Order and Long-Range Entanglement |
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6 Introduction to Topological Order |
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157 | (34) |
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157 | (5) |
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6.1.1 Phases of Matter and Landau's Symmetry-Breaking Theory |
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157 | (2) |
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6.1.2 Quantum Phases of Matter and Transverse-Field Ising Model |
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159 | (1) |
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6.1.3 Physical Ways to Understand Symmetry Breaking in Quantum Theory |
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160 | (2) |
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6.1.4 Compare a Finite-Temperature Phase with a Zero-Temperature Phase |
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162 | (1) |
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162 | (2) |
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6.2.1 The Discovery of Topological Order |
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162 | (2) |
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6.3 A Macroscopic Definition of Topological Order |
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164 | (3) |
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6.3.1 What is "Topological Ground-State Degeneracy" |
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166 | (1) |
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6.3.2 What is "Non-Abelian Geometric Phase of Topologically Degenerate States" |
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167 | (1) |
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6.4 A Microscopic Picture of Topological Orders |
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167 | (4) |
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6.4.1 The Essence of Fractional Quantum Hall States |
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167 | (1) |
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6.4.2 Intuitive Pictures of Topological Order |
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168 | (3) |
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6.5 What is the Significance of Topological Order? |
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171 | (1) |
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6.6 Quantum Liquids of Unoriented Strings |
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172 | (2) |
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6.7 The Emergence of Fractional Quantum Numbers and Fermi/Fractional Statistics |
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174 | (2) |
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6.7.1 Emergence of Fractional Angular Momenta |
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174 | (1) |
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6.7.2 Emergence of Fermi and Fractional Statistics |
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175 | (1) |
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6.8 Topological Degeneracy of Unoriented String Liquid |
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176 | (2) |
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6.9 Topological Excitations and String Operators |
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178 | (7) |
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6.9.1 Toric Code Model and String Condensation |
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178 | (2) |
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6.9.2 Local and Topological Excitations |
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180 | (1) |
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6.9.3 Three Types of Quasiparticles |
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181 | (1) |
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6.9.4 Three Types of String Operators |
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181 | (3) |
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6.9.5 Statistics of Ends of Strings |
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184 | (1) |
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6.10 Summary and Further Reading |
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185 | (1) |
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186 | (5) |
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7 Local Transformations and Long-Range Entanglement |
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191 | (42) |
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191 | (1) |
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7.2 Quantum Phases and Phase Transitions |
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192 | (3) |
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7.3 Quantum Phases and Local Unitary Transformations |
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195 | (8) |
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7.3.1 Quantum Phases and Local Unitary Evolutions in Ground States |
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195 | (2) |
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7.3.2 Local Unitary Evolutions and Local Unitary Quantum Circuits |
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197 | (3) |
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7.3.3 Local Unitary Quantum Circuits and Wave Function Renormalization |
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200 | (3) |
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7.4 Gapped Hamiltonians and Topological Order |
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203 | (7) |
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7.4.1 Gapped Quantum Systems and Gapped Quantum Phases |
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204 | (1) |
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7.4.2 Gapped Quantum Liquid System and Gapped Quantum Liquid Phase |
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205 | (3) |
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208 | (2) |
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7.5 Universality Classes of Many-Body Wave Functions |
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210 | (11) |
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7.5.1 Gapped Quantum Liquid |
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210 | (2) |
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7.5.2 Symmetry-Breaking Order |
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212 | (2) |
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7.5.3 Stochastic Local Transformations and Long-Range Entanglement |
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214 | (7) |
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7.6 Symmetry-Protected Topological Order |
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221 | (2) |
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7.7 A New Chapter in Physics |
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223 | (1) |
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7.8 Summary and Further Reading |
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224 | (2) |
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226 | (7) |
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Part IV Gapped Topological Phases and Tensor Networks |
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8 Matrix Product State and ID Gapped Phases |
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233 | (22) |
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233 | (1) |
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8.2 Matrix Product States |
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234 | (13) |
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8.2.1 Definition and Examples |
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234 | (2) |
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236 | (2) |
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8.2.3 Calculation of Norm and Physical Observables |
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238 | (1) |
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239 | (1) |
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8.2.5 Entanglement Area Law |
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240 | (1) |
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8.2.6 Gauge Degree of Freedom |
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241 | (1) |
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8.2.7 Projected Entangled Pair Picture |
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242 | (1) |
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243 | (1) |
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244 | (2) |
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8.2.10 Parent Hamiltonian |
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246 | (1) |
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8.3 Renormalization Group Transformation on MPS |
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247 | (2) |
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8.4 No Intrinsic Topological Order in ID Bosonic Systems |
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249 | (3) |
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8.5 Summary and Further Reading |
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252 | (1) |
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253 | (2) |
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9 Tensor Product States and 2D Gapped Phases |
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255 | (26) |
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255 | (1) |
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9.2 Tensor Product States |
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256 | (7) |
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9.2.1 Definition and Examples |
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256 | (3) |
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259 | (4) |
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9.3 Tensor Network for Symmetry-Breaking Phases |
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263 | (3) |
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264 | (1) |
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9.3.2 Structural Properties |
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264 | (1) |
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9.3.3 Symmetry Breaking and the Block Structure of Tensors |
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265 | (1) |
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9.4 Tensor Network for Topological Phases |
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266 | (9) |
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267 | (1) |
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9.4.2 Structural Properties |
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267 | (2) |
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9.4.3 Topological Property from Local Tensors |
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269 | (2) |
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9.4.4 Stability Under Symmetry Constraint |
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271 | (4) |
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9.5 Other Forms of Tensor Network Representation |
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275 | (2) |
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9.5.1 Multiscale Entanglement Renormalization Ansatz |
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275 | (1) |
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9.5.2 Tree Tensor Network State |
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276 | (1) |
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9.6 Summary and Further Reading |
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277 | (1) |
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278 | (3) |
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10 Symmetry-Protected Topological Phases |
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281 | (54) |
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281 | (1) |
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10.2 Symmetry-Protected Topological Order in ID Bosonic Systems |
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282 | (21) |
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282 | (3) |
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10.2.2 On-Site Unitary Symmetry |
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285 | (9) |
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10.2.3 Time Reversal Symmetry |
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294 | (2) |
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10.2.4 Translation Invariance |
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296 | (7) |
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10.2.5 Summary of Results for Bosonic Systems |
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303 | (1) |
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10.3 Topological Phases in ID Fermion Systems |
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303 | (7) |
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10.3.1 Jordan-Wigner Transformation |
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304 | (1) |
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10.3.2 Fermion Parity Symmetry Only |
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305 | (2) |
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10.3.3 Fermion Parity and T2 = 1 Time Reversal |
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307 | (1) |
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10.3.4 Fermion Parity and T2 ≠ 1 Time Reversal |
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308 | (1) |
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10.3.5 Fermion Number Conservation |
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309 | (1) |
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10.4 2D Symmetry-Protected Topological Order |
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310 | (15) |
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310 | (4) |
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314 | (11) |
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10.5 General Construction of SPT Phases |
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325 | (4) |
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325 | (2) |
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10.5.2 SPT Model from Group Cohomology |
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327 | (2) |
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10.6 Summary and Further Reading |
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329 | (1) |
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330 | (5) |
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11 A Unification of Information and Matter |
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335 | |
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11.1 Four Revolutions in Physics |
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335 | (9) |
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11.1.1 Mechanical Revolution |
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336 | (2) |
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11.1.2 Electromagnetic Revolution |
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338 | (1) |
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11.1.3 Relativity Revolution |
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339 | (3) |
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11.1.4 Quantum Revolution |
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342 | (2) |
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11.2 It from Qubit, Not Bit |
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344 | (3) |
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347 | (14) |
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347 | (2) |
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11.3.2 Principle of Emergence |
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349 | (3) |
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11.3.3 String-Net Liquid of Qubits Unifies Light and Electrons |
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352 | (5) |
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11.3.4 Evolving Views for Light and Gauge Theories |
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357 | (2) |
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11.3.5 Where to Find Long-Range Entangled Quantum Matter? |
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359 | (2) |
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361 | |