Nanoscience, nanotechnologies and the laws of quantum physics are sources of disruptive innovation that open up new fields of application. Quantum engineering enables the development of very sensitive materials, sensor measurement systems and computers. Quantum computing, which is based on two-level systems, makes it possible to manufacture computers with high computational power.
This book provides essential knowledge and culminates with an industrial application of quantum engineering and nanotechnologies. It presents optical systems for measuring at the nanoscale, as well as quantum physics models that describe how a two-state system interacts with its environment. The concept of spin and its derivation from the Dirac equation is also explored, while theoretical foundations and example applications aid in understanding how a quantum gate works. Application of the reliability-based design optimization (RBDO) method of mechanical structures is implemented, in order to ensure reliability of estimates from the measurement of mechanical properties of carbon nanotube structures.
This book provides valuable support for teachers and researchers but is also intended for engineering students, working engineers and Masters students.
Preface ix
Introduction xiii
Chapter 1. Measurement Systems Using Polarized Light 1
1.1. Introduction 1
1.2. Matrix optics 2
1.3. Photon emission and detection 12
1.4. Application exercises on interferometry 16
1.4.1. Propagation of electromagnetic waves in a FabryPérot cavity 18
1.4.2. Propagation of electromagnetic waves in a material 19
1.4.3. Interferometry and optical lambda meter 21
1.4.4. The homodyne interferometer and refractometer 34
1.4.5. The heterodyne interferometer 40
1.4.6. Application exercises on ellipsometry 51
1.5. Appendices 56
1.5.1. Conventions used for Jones vectors and Jones ABCD matrices 56
1.5.2. 2×2 transfer dies 59
1.5.3. 2×2 matrix multiplication 59
1.5.4. Trigonometric forms 60
1.5.5. Solution by MATLAB (exercises 1.4.3, 1.4.4 and 1.4.5) 61
1.6. Conclusion 66
Chapter 2. Quantum-scale Interaction 67
2.1. Introduction 67
2.2. The spin through the Dirac equation 69
2.2.1. Theoretical background 69
2.2.2. Application: the Dirac equation and Pauli matrices 74
2.3. The density matrix for a two-level laser system 105
2.3.1. Definition of the density matrix 106
2.3.2. Density matrix properties 110
2.3.3. Equation of motion of the density matrix 113
2.3.4. Application to a two-level system 116
2.4. Isings phenomenological model for cooperative effects 123
2.4.1. The Ising 1D model 124
Chapter 3. Quantum Optics and Quantum Computers 135
3.1. Introduction 135
3.2. Polarized light in quantum mechanics 136
3.3. Introduction to quantum computers 140
3.4. Preparing a qubit 158
3.4.1. Application of the Bloch sphere 158
3.5. Application: interaction of a qubit with a classical field 172
3.5.1. Answer to question 1 173
3.5.2. Answer to question 2 176
3.6. Applying Ramsey fringes to evaluate the duration of phase coherence 181
3.6.1. Answer to question 1 181
3.6.2. Answer to question 2 183
Chapter 4. Reliability-based Design Optimization of Structures 185
4.1. Introduction 185
4.2. Deterministic optimization 186
4.3. Reliability analysis 187
4.3.1. Optimal conditions 189
4.4. Reliability-based design optimization 191
4.4.1. The objective function 192
4.4.2. Taking into account the total cost 192
4.4.3. Design variables 193
4.4.4. Response of a system by RBDO 193
4.4.5. Limit states 194
4.4.6. Solving methods 194
4.5. Applications 194
4.5.1. Application on a bending beam 194
4.5.2. Application on a circular plate with different thicknesses 196
4.5.3. Application: hook A 201
4.5.4. Application: optimization of the materials of an electronic board 211
4.6. Reliability-based design optimization in nanotechnology 222
4.6.1. Thin-film SWCNT structures 222
4.6.2. Digital model of thin-film SWCNT structures 224
4.6.3. Numerical results 225
4.7. Conclusion 231
Appendix 233
References 237
Index 245
