Marking a century since the birth of Quantum Mechanics, this book explores the enduring impact of the ideas that transformed modern science. Bringing together leading research in quantum information, precision measurement, and many-body dynamics, it highlights how foundational concepts such as superposition, entanglement, and quantum statistics continue to drive innovation. From quantum randomness and weak measurements to advanced metrology, multipartite entanglement, and trapped-ion sensing, the volume showcases contemporary breakthroughs while offering a glimpse into the future of quantum discovery.