Quantum computing is gaining traction, with over $55 billion in global investments. China, Germany, France, and the United States are at the forefront of these efforts. Quantum computers, which use qubits, promise exponential processing performance, with possible corporate gains ranging from $500 million to $1 billion within 15 years. The technology, which is still in its early stages, makes use of sophisticated physics such as superconductivity and photonics to realise its full potential.