Quantum 2.0 is a new OSA conference focusing on the development and use of many-body quantum superposition, entanglement, and measurement to advance science and technology. Examples are quantum computing and simulation, quantum communications, and quantum sensing. New resulting technologies will potentially go far beyond the (quantum 1.0) capabilities offered by systems without the conceptual need for large-scale superposition or entanglement, examples of which are conventional semiconductor electronics, laser-based communication systems and magnetic-resonance medical imagers.