Fundamentally, a quantum computer works on qubits whereas today’s computer works on bits. A single bit can be in a state of 1 or 0, where 1 means positive and 0 means negative. These arrangements of bits give a computer ‘on’ or ‘off’ state, and similarly programs on modern day computers which are also known as the binary system, work on following the same principle. But ‘qubits’ can represent 0, 1 and quantum superposition of various combinations. Thus, two qubits can represent 4 different states and three qubits can represent 8 different states i.e. n qubits can represent an arbitrary superposition of 2ndifferent states simultaneously, whereas a modern transistor based computer can represent any one of this 2n state on any given time. So, theoretically it is possible to work extremely faster using quantum computer, almost at the speed of light. Thus, a quantum computer can work on all the 2n numbers parallel which the present binary system cannot do. Though one may not be able to boost performance while working on word processing or internet browsing, but when one tries to work on cryptography, scientific problems, indexing a huge database, then the real power of a quantum computer can be achieved.