Chapter 1: Quantum hybrid sensor by NV centers in diamond
Authored by Norikazu MIZUOCHI

Chapter 2: Magnetic Field Sensing using Nitrogen-Vacancy Centers in Diamond
Authored by Junko Ishi-Hayase and Yuichiro Matsuzaki

Chapter 3: Wide-field imaging using ensembles of NV centers in diamond
Authored by Shintaro Nomura

Chapter 4: Collective behaviour in hybrid quantum systems
Authored by Yusuke Hama, Andreas Angerer, Emi Yukawa, W. J. Munro and Kae Nemoto

Chapter 5: Rare earth "non-spin-bath" crystals for hybrid quantum coupling
Authored by Takehiko Tawara

Chapter 6: Electron spin resonances detected by superconducting circuits
Authored by Rangga P. Budoyo, Hiraku Toida, Shiro Saito

Chapter 7: Quantum information and technologies with spin-based hybrid systems
Authored by Yuimaru Kubo

Chapter 8: Spins in silicon field-effect transistors
Authored by Keiji Ono

Chapter 9: Ge/Si core-shell nanowires for hybrid quantum systems
Authored by Rui Wang, Jian Sun, Russell S. Deacon and Koji Ishibashi

Chapter 10: Photonic quantum interfaces among different physical systems
Authored by Rikizo Ikuta, Motoki Asano, Sahin K. Ozdemir, Takashi Yamamoto

Chapter 11: Hybrid quantum system of photons and nuclear spins of fermionic neutral atoms in a tunable optical lattice
Authored by Hideki Ozawa, Shintaro Taie, Yosuke Takasu, and Yoshiro Takahashi

Chapter 12: Phonon-electron-nuclear spin hybrid systems in an electromechanical resonator
Authored by Yuma Okazaki and Hiroshi Yamaguchi

Chapter 13: Cavity Quantum Electrodynamics with Laser-Cooled Atoms and Optical Nanofibers
Authored by Takao Aoki

Chapter 14: Robust quantum sensing
Authored by Yuichiro Matsuzaki

Chapter 15: Transferring quantum information in hybrid quantum systems consisting of a quantum system with limited control and a quantum computer
Authored by Ryosuke Sakai, Akihito Soeda, Mio Murao