Note: Intro -- Preface -- Contents -- Control of Spin Coherence and Quantum Sensing in Diamond -- 1 Extension of Coherence Times of NV Centers in Diamond -- 1.1 Long Coherence Times and High Magnetic Sensitivity with NV Centres in Phosphorus-Doped n-type Diamond -- 1.2 Extension of the Coherence Time by Generating MW Dressed States in a Single NV Centre in Diamond -- 2 Electrical Control and Detection of Spin Coherence in Diamond -- 2.1 Electrical Control for Extension of Spin Coherence Times of NV Centers in Diamond -- 2.2 Room Temperature Electrically Detected Nuclear Spin Coherence of NV Centres in Diamond -- 2.3 Ferromagnetic-Resonance Induced Electromotive Forces in Ni81Fe19|p-Type Diamond -- 3 Quantum Hybrid Sensors -- 3.1 Hybrid Quantum Magnetic-Field Sensor with an Electron Spin and a Nuclear Spin in Diamond -- 3.2 ODMR of High-Density Ensemble of NV− Centers in Diamond -- 3.3 Optimization of Temperature Sensitivity Using the ODMR Spectrum of a NV Center Ensemble -- References -- Wide-Field Imaging Using Ensembles of NV Centers in Diamond -- 1 Introduction -- 2 Experimental Techniques for Wide-Field Imaging -- 2.1 Diamond Samples Used for Wide-Field Imaging -- 2.2 Experimental Technique -- 3 Optically Detected Magnetic Resonance -- 4 Ramsey Fringe -- 5 Frequency Modulation -- 6 Imaging of Microwave Intensity -- 7 Summary and Outlook -- References -- Collective Effects in Hybrid Quantum Systems -- 1 Introduction -- 2 Non-linear Effects -- 2.1 Amplitude Bistability in a HQS -- 2.2 Superradiance in a HQS -- 3 Quantum Effects -- 3.1 Applications -- 4 Summary and Perspectives -- References -- Rare Earth Non-spin-bath Crystals for Hybrid Quantum Systems -- 1 Rare-Earth Doped Crystals as Platform for Hybrid Quantum Systems -- 2 Magnetic Purification of Guest Ions -- 2.1 Growth of 167Er3+ Doped Y2SiO5 -- 2.2 Spectral Hole Burning. , 2.3 Coherent Transients -- 3 Magnetic Purification of Host Crystal -- 3.1 (ErSc)2O3 Grown on Si Substrates -- 3.2 Er-Doped CeO2 Grown on Si Substrates -- 3.3 Photonic Structures on Epitaxial RE Oxide -- 4 Summary -- References -- Electron Spin Resonance Detected by Superconducting Circuits -- 1 Introduction -- 1.1 Superconducting Quantum Circuits -- 1.2 Local Electron Spin Resonance -- 2 ESR Using dc-SQUID -- 2.1 Experimental Setup -- 2.2 Magnetometry -- 2.3 ESR Spectroscopy -- 2.4 Estimation of Sensing Volume and Sensitivity -- 3 ESR Using a Josephson Bifurcation Amplifier -- 3.1 Josephson Bifurcation Amplifiers -- 3.2 ESR Spectroscopy Setup -- 3.3 ESR Spectroscopy of Er:YSO Using a JBA -- 3.4 Measurement Sensitivity -- 4 ESR Detected by a Flux Qubit with Switching Readout -- 4.1 Experimental Setup -- 4.2 Magnetometry -- 4.3 ESR Spectroscopy -- 4.4 Estimation of Sensitivity -- 5 ESR Detected by a Flux Qubit with JBA Readout -- 5.1 ESR Spectroscopy Setup -- 5.2 ESR Spectroscopy of Er:YSO -- 5.3 Measurement Sensitivity and 1/f Flux Noise -- 6 Summary and Perspectives -- References -- Hybrid Quantum Systems with Spins in Diamond Crystals and Superconducting Circuits -- 1 Introduction -- 2 Impurity Spins in Diamond -- 2.1 NV Centers in Diamond -- 3 Circuit Quantum Electrodynamics -- 3.1 Superconducting Resonators: Quantum LC Oscillators -- 3.2 Superconducting Qubits -- 4 Spin Ensemble Quantum Memories for Microwave Photons -- 4.1 Strong Coupling of a Spin Ensemble to a Superconducting Resonator -- 4.2 Coherent Coupling of a Superconducting Qubit and a Spin Ensemble -- 4.3 Towards a Spin-Ensemble Quantum RAM -- 5 Summary and Perspective -- References -- High-Temperature Spin Qubit in Silicon Tunnel Field-Effect Transistors -- 1 Background and Core Technology -- 2 Electrically Accessing a Deep Impurity -- 3 Device and Measurement. , 4 Single Electron Transport at Room Temperature -- 5 Double-Quantum-Dot Transport -- 6 Spin Blockade and Qubit -- 7 Quantum Interference -- 8 Other Devices -- 9 Outlook -- References -- Ge/Si Core-Shell Nanowires for Hybrid Quantum Systems -- 1 Introduction -- 2 Evaluation of the Strength of Spin-Orbit Interaction -- 2.1 Spin-Orbit Interaction in a Ge/Si Nanowire -- 2.2 Weak (Anti-)localization -- 2.3 Dual Gated Device -- 2.4 Electrical Modulation of Spin-Orbit Interaction -- 3 Detection of Helical Spin State in Ge/Si Core/Shell Nanowire -- 3.1 Principle -- 3.2 Experimental Considerations -- 3.3 Helical State Studies in III-V Nanowires -- 3.4 Hole Helical State Detection in Ge/Si Nanowires -- 4 Toward Spin-Photon Coupling -- 4.1 Double Quantum Dot Embedded in a Superconducting Cavity -- 4.2 Model -- 4.3 Charge Stability in a Double Quantum Dot -- 4.4 Tunable Charge Dipolar Coupling -- 5 Summary -- References -- Photonic Quantum Interfaces Among Different Physical Systems -- 1 Introduction -- 2 Quantum Frequency Conversion (QFC) -- 2.1 Second-Order Nonlinear Optical Interaction -- 2.2 Theory and Background for QFC -- 2.3 QFC for Optical-Fiber-Based Quantum Network -- 3 Atom-Photon Quantum Interface -- 3.1 Atomic Ensemble Quantum Memory -- 3.2 Atom-Photon Entanglement -- 3.3 Summary -- 4 Optomechanical Interface -- 4.1 Basic Optomechanical Operation -- 4.2 Composite Cavity Optomechanical Architecture -- 4.3 External Cavity Architecture -- 4.4 Summary -- 5 Conclusions -- References -- Hybrid Quantum System of Fermionic Neutral Atoms in a Tunable Optical Lattice -- 1 Introduction -- 1.1 Outline of This Chapter -- 2 Spatial Adiabatic Passage in a Lieb Lattice -- 2.1 Three-Level System with Λ-type Transition -- 2.2 Lieb Lattice -- 2.3 Optical Lieb Lattice -- 2.4 Correspondence Between a Three-Level System and Lieb Lattice. , 2.5 Spatial Adiabatic Passage (SAP) -- 2.6 Autler-Townes Doublet -- 2.7 Conclusion -- 3 Antiferromagnetic Spin Correlation of SU(N) Fermi Gas in an Optical Dimerized Lattice -- 3.1 Local Entropy Redistribution -- 3.2 SU(mathcalN) Fermi-Hubbard Hamiltonian in a Dimerized Cubic Lattice -- 3.3 Optical Dimerized Lattice Potential -- 3.4 Spin Manipulation by Optical Pumping -- 3.5 Singlet-Triplet Oscillation (STO) in Dimer -- 3.6 Comparison Between SU(4) and SU(2) Systems -- 3.7 Conclusion -- 4 Summary and Outlook -- 4.1 Outlook -- References -- Phonon-Electron-Nuclear Spin Hybrid Systems in an Electromechanical Resonator -- 1 Introduction -- 2 Experimental Methods -- 2.1 Fabrication of an Electromechanical Resonator -- 2.2 Transport Measurements for an Electromechanical Resonator -- 3 Displacement Sensing with Quantum Dot and Point Contact -- 3.1 Displacement Transducers with QPC and QD -- 3.2 Thermal Motion Measurements and Displacement Sensitivity -- 4 Nuclear Spin Manipulation with an Electromechanical Resonator -- 4.1 Mechanical Resonator Quadrupole-Coupled with Nuclear Spins -- 4.2 Experimental Observation of Mechanical ac-Stark Shift -- References -- Cavity Quantum Electrodynamics with Laser-Cooled Atoms and Optical Nanofibers -- 1 Introduction -- 2 Cavity QED -- 2.1 Jaynes-Cummings Model -- 2.2 Dissipations -- 2.3 Dynamics -- 2.4 Deterministic Generation of Single Photons -- 2.5 Input and Output -- 2.6 Transfer Matrix Method -- 3 Nanofiber Cavity QED -- 3.1 Strong Coupling with a Nanofiber Cavity and Single Trapped Atoms -- 3.2 Fabrication of Low-Loss Tapers -- 3.3 Fabrication of Low-Loss FBGs -- 4 Coupled Cavities QED -- 5 Outlook -- References -- Robust Quantum Sensing -- 1 Introduction -- 2 Magnetic Field Sensing with Qubits Without Decoherence -- 3 Magnetic Field Sensing with Entangled States Without Decoherence -- 4 Dephasing on the Qubit. , 5 Magnetic Field Sensing with Separable States Under the Effect of Dephasing -- 6 Magnetic Field Sensing with Entangled States Under the Effect of Dephasing -- 7 Suppression of the Dephasing by Quantum Teleportation -- 8 Magnetic Field Sensing with Quantum Teleportation Under the Effect of Dephasing Using Separable States -- 9 Magnetic Field Sensing with Quantum Teleportation Under the Effect of Dephasing Using Entangled States -- 10 Magnetic Field Sensing with Imperfect Quantum Teleportation Under the Effect of Dephasing Using Separable States -- 11 Magnetic Field Sensing with Imperfect Quantum Teleportation Under the Effect of Dephasing Using Entangled States -- 12 Conclusion -- References -- Transferring Quantum Information in Hybrid Quantum Systems Consisting of a Quantum System with Limited Control and a Quantum Computer -- 1 Introduction -- 2 Settings -- 2.1 Assumptions for a Physical System Coupling to a Quantum Computer -- 3 Approximate IO Operations Evaluated in Terms of the Diamond Norm -- 4 The LS Algorithm -- 4.1 Quantum Circuit Representation of the Algorithm -- 4.2 Necessary Conditions for SN(Uint) -- 4.3 Implementing WN(Uint) by Applying Uint -- 5 The CS Algorithm -- 5.1 Algorithm -- 5.2 Conditions for Interface Unitary Operators -- 6 Final Adjustment of Input-Output Algorithms -- 6.1 Corrections for the Effects of HS -- 6.2 Designing Input Operations -- 7 Effective Interface -- 8 Conclusion -- 9 Appendix -- 9.1 Proof of Lemma 1 -- 9.2 The Details of the CS Algorithm -- References.

Note: Intro -- Preface -- Contents -- Diversity of Hybrid Quantum Systems -- 1 Introduction -- 2 Various Hybridizations -- 3 Sharpening of Each Technology -- 4 Importance of Material Development -- 5 Development of New Metrology -- 6 Concluding Remarks -- References -- Phonon Engineering for Quantum Hybrid Systems -- 1 Introduction -- 2 Fundamentals -- 3 Advanced Researches -- References -- Phonon Engineering of Graphene by Structural Modifications -- 1 Introduction -- 2 Phonon Dispersion in Graphene -- 3 Thermal Conductivity Measurement of 2D Materials by Raman Spectroscopy -- 4 Phonon Engineering of Graphene by Isotope Atoms -- 5 Graphene Isotopic Heterostructures -- 6 Heat Conduction of Graphene Isotopic Heterostructures -- 7 Isotopic Superlattice for Further Reduction in Heat Conduction -- 8 Phonon Engineering of Graphene by Defects -- 9 Electron-phonon Interaction of Graphene with Defects -- 10 Heat Conduction of Graphene with Defects -- 11 Concluding Remarks -- References -- On-Chip Wave Manipulations Enabled by Electromechanical Phononic-Crystal Waveguides -- 1 Introduction -- 1.1 Nano-/Micro-electromechanical Systems (N/MEMS) -- 1.2 Phononic Crystal (PnC) -- 1.3 Phononic Technology for Hybrid Quantum Systems -- 1.4 Electromechanical PnC -- 2 Device and Properties -- 2.1 Fabrication -- 2.2 Spectral Transmission Properties -- 2.3 Temporal Transmission Property -- 3 Temporal and Dynamic Control of Acoustic Waves -- 3.1 Waveform Engineering via Group Velocity Dispersion -- 4 Conclusion -- References -- Electron and Phonon Transport Simulation for Quantum Hybrid System -- 1 Introduction -- 2 Phonon Transport Simulation -- 2.1 NEGF Method -- 2.2 R-matrix Method -- 2.3 Simulation Examples -- 3 Electron Transport Simulation -- 3.1 NEGF Method -- 3.2 Equivalent Model -- 3.3 Simulation Example -- 4 Electron and Phonon Transport Simulation. , 4.1 NEGF Method -- 4.2 Simulation Example -- References -- Suspended Carbon Nanotubes for Quantum Hybrid Electronics -- 1 Introduction -- 2 Synthesis and Evaluation of Suspended Carbon Nanotube -- 2.1 Synthesis -- 2.2 Evaluation -- 3 Lattice Vibration Properties of Suspended Carbon Nanotubes -- 3.1 Radial Breathing Mode -- 3.2 Intermediate Frequency Mode -- 3.3 G Mode -- 4 Thermal Conductivity Measurement -- 4.1 Method -- 4.2 Analysis of Thermal Conductivity -- 5 Summary -- References -- Quantum Effects in Carbon Nanotubes: Effects of Curvature, Finite-Length and Topological Property -- 1 Introduction -- 2 Basics of Electronic Property of Carbon Nanotubes -- 2.1 Geometrical Structure of Nanotubes -- 2.2 Electronic Property of a Graphene -- 2.3 Cutting Lines and Electronic Property of a Nanotube -- 2.4 Angular Momentum and Cutting Line -- 2.5 1D Lattice Model -- 3 Curvature Induced Effects -- 3.1 Curvature-Induced Energy Gap in the Metallic Nanotubes -- 3.2 Spin-Orbit Interaction -- 3.3 Asymmetric Velocities -- 4 Electrons in Finite-Length Nanotubes -- 4.1 Discrete Energy Levels -- 4.2 Nanotubes as Topological Matters -- References -- Synthesis and Transport Analysis of Turbostratic Multilayer Graphene -- 1 Introduction -- 2 Multilayer Graphene Fabricated by the Solid-Template Process -- 3 Multilayer Graphene Nanoribbon -- 4 Multilayer Graphene Synthesized from Graphene Oxide Materials -- 5 Conclusion and Future Perspectives -- References -- Quantum Anomalous Hall Effect in Magnetic Topological Insulator -- 1 Introduction -- 2 Topological Insulator -- 3 Experimental Observation of Quantum Anomalous Hall Effect -- 4 Various Phases of Magnetic Topological Insulator -- 5 Future Prospective -- References -- Transport Properties and Terahertz Dynamics of Single Molecules -- 1 Introduction -- 2 Forming Electrical Access to Single Molecules. , 2.1 Scanning Tunneling Microscopy -- 2.2 Mechanical Break Junction Method -- 2.3 Electrical Break Junction Method -- 2.4 Single Molecule Transistors -- 3 Terahertz Spectroscopy at a Single Molecule Level -- 3.1 Focusing Terahertz Electric Fields by Nanogap Electrodes -- 3.2 Gigantic Enhancement of Terahertz Electric Fields in Nanogaps -- 3.3 Excitation of Molecular Vibrations by Terahertz Radiation in Single Molecule Transistors -- 3.4 Ultrafast Vibration of a Single Fullerene Molecule -- 3.5 Effect of Single Electron Charging on the Electronic Structures of Single Molecules -- 3.6 Rattling Motion of a Single Atom Encapsulated in a Fullerene Cage -- 3.7 Single Molecule Terahertz Spectroscopy Using Scanning Tunneling Probes -- 4 Summary -- References -- Novel Phonon Generator and Photon Detector by Single Electron Transport in Quantum Dots -- 1 Introduction -- 2 Single Phonon Generator by Double Quantum Dot -- 2.1 Electron-Phonon Interaction in Single Quantum Dot -- 2.2 LO Phonon Generator by Double Quantum Dot -- 2.3 Phonon Lasing and Antibunching -- 3 THz Photon Detector by Quantum Dot Array -- 3.1 Electron-Photon Interaction in Quantum Dot -- 3.2 Formulation of Photocurrent Through Single Quantum Dot -- 3.3 Dicke Effect on Photocurrent Through an Array of Quantum Dots -- 4 Conclusions -- References -- Hyperfine-Mediated Transport in a One-Dimensional Channel -- 1 Introduction -- 2 Quantum Point Contacts -- 3 1D Magnetotransport -- 4 Dynamic Nuclear Polarization in GaAs Point Contacts -- 5 RDNMR Lineshapes in a Quantum Point Contact -- 6 Structural Lattice Deformation -- 7 Overtone RDNMR -- 8 Spin Dynamics in 1D Semiconductor Devices -- 9 Electron Spin Polarization in a 1D System -- References -- Microscopic Properties of Quantum Hall Effects -- 1 Introduction -- 1.1 Outline -- 1.2 Quantum Hall Effect. , 1.3 Resistively Detected Nuclear Magnetic Resonance in QH Effect -- 1.4 Nuclear Electric Resonance of Quadrupolar Nuclei -- 1.5 Resistively Detected Knight-Shift Measurement in QH Effect -- 2 Scanning Probe Techniques -- 2.1 Scanning Gate Imaging -- 2.2 Nonequilibrium-Transport-Assisted Scanning Gate Imaging -- 2.3 Scanning Nuclear Resonance Imaging -- 3 Microscopic Properties of Quantum Hall Electronic System -- 4 Microscopic Observation of Hyperfine-Coupled Quantum Hall Systems -- 4.1 Local NR and Resistive Detection -- 4.2 NR Spectroscopy Mapping -- 5 Summary and Outlook -- References -- Semiconductor Chiral Photonic Crystal for Controlling Circularly Polarized Vacuum Field -- 1 Introduction -- 2 Chiral Photonic Crystals -- 3 Three-Dimensional Chiral Woodpile Photonic Crystals -- 3.1 Chiral Woodpile Structures -- 3.2 Fabrication of Semiconductor-Based Chiral Photonic Crystals -- 3.3 Optical Activity -- 4 QD Light Emission in Engineered Circularly Polarized Vacuum Field -- 4.1 Numerical Analysis on the Emission Properties -- 4.2 Measurement Setups -- 4.3 Degree of Circular Polarization in Emission -- 4.4 Radiative Lifetime of Circularly Polarized Components -- 4.5 Discussion -- 5 Summary -- References -- Hybrid Structure of Semiconductor Quantum Well Superlattice and Quantum Dot -- 1 Quantum Well and Quantum Well Superlattice -- 2 Quantum Dot -- 3 Hybrid Structure of Semiconductor Quantum Well Superlattice and Quantum Dot -- References.