What is Quantum Computing? Definition and Examples

Quantum computing, which utilizes the strange properties of quantum mechanics, is a new type of computer technology. With quantum computing, we can perform complicated calculations significantly faster than with our current computers.

The computers you and I use today use binary bits to store data, as either a 0 or a 1. Quantum computers use qubits, i.e., quantum bits, which can exist in different states simultaneously.

IBM Osprey - Quantum Computing
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According to IBM, one of the world’s leading technology corporations:

“Quantum computing is a rapidly-emerging technology that harnesses the laws of quantum mechanics to solve problems too complex for classical computers.”

Quantum computers – speed

By using qubits, quantum computers can process a large number of solutions to a problem at the same time. They are especially well suited for physicists, mathematicians, and other number crunchers for whom computers today are too slow.

Quantum computers are ideal for, for example, optimization, cryptography, and simulating the behavior of quantum systems.

Manipulating qubits

  • Superposition

Quantum computers use superposition and other techniques to manipulate qubits. Superposition allows qubits to exist in many different states simultaneously.

  • Entanglement

These futuristic computers also use entanglement, where one qubit’s state correlates with that of another.

Thanks to superposition and entanglement, quantum computers can perform certain types of calculations at incredible speed.

Definition of Quantum Mechanics
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Where are not there yet

To be able to use quantum computing technology on a large scale, we still need to overcome some challenges. For example, the qubits’ delicate quantum state is easily disrupted by temperature and noise, which makes it extremely difficult to build a large-scale quantum computer.

Experts say that they have made significant progress in recent years and hope to have usable quantum computers on the market in the not-so-distant future.

These amazing machines could one day revolutionize how we solve complex problems. They could also bring an explosion of new scientific breakthroughs.


There is no doubt that when we have overcome the challenges and have quantum computers in the mass market, they will have a profound impact on science, mathematics, business operations, and other aspects of human life.