A quantum computer is a special type of computer that relies on the principles of quantum mechanics to solve mathematical problems. A quantum computer is a new generation of powerful computational machines. With the help of quantum computing, people could transmit data over loosely-coupled fast networks that will resist interference from attackers or eavesdroppers. Quantum computation can also encode information in various modes, which means there are multiple ways to get the same result for any given problem. And finally, it’s possible because quantum computers’ processors use qubit units that exploit the laws of quantum mechanics
A classical (or traditional) data processor, like the ones within your laptop or smartphone, can process two values at any given moment in time. Classical computers use binary digits, orbits, consisting of zeros and ones; they only know what to do if told whether each bit is a one or zero. Quantum computers use qubits which are much more powerful than bits – it’s like comparing letters (ABC) with numbers (1 2 3 4 5).