Scalability of Quantum Information Processing
Quantum information processing offers the tantalizing possibility to revolutionize computing by employing fundamentally different physical principles than today's computers. This revolution is made possible by using quantum entanglement and the superposition principle to achieve a parallelism that is intrinsic to the physical device at the lowest level. Thus, the change of paradigm associated with quantum computing compared with present-day processors is more fundamental than the 5000 year-long evolution from the abacus to semiconductor circuits. For certain problems such as prime factorization, solving linear equations or the accurate simulation of quantum dynamics, quantum computing is predicted to offer an exponential speedup and may thus render currently intractable problems solvable. Many further applications will likely be discovered as the field progresses.
Lehrstuhl für Experimentalphysik IIC, RWTH Aachen , Prof. Dr. Hendrik Bluhm
Institut für Quanteninformationen, RWTH Aachen , Prof. Dr. David P. DiVincenzo