Call us Commercial Applications. Scientists are working to improve accuracy e. Quantum computers are based on two properties of quantum physics called superposition and entanglement. D isaster management through better prediction, etc. One of the most difficult aspects of building quantum computers is managing or eliminating quantum decoherence Disadvantages:- The main disadvantage of computing is the technology required to implement a quantum computer is not available at present. A computer with N transistors can only encode 2N states.