A quantum computer is a highly-advanced computer system that works exponentially faster than today’s conventional computers. Quantum computing is the practice of studying quantum computers and their potential. This practice is growing and has caused the rapid decrease in the size of computers at the same time as these systems are rapidly increasing in their capability. However, quantum computers are still being developed and have not yet become accessible.
What is a quantum computer?
A quantum computer is an advanced computer system. Quantum computing studies theoretical computation systems which use quantum-mechanical phenomena (e.g., superposition, entanglement) to perform data operations. While the average computer’s memory is made up of bits, a quantum computer’s memory is made up of qubits. A regular computer saves information in binary form using zeroes and ones, which are called bits. These strings of numbers, which are comprised of 0s and 1s, create codes that instruct the computer on how to proceed. However, a qubit in a quantum computer is a particle (e.g., atom, electron, photon) which is manipulated to store information. It is a two-state quantum-mechanical system, such as the polarization of a single photon, which can be vertical and horizontal polarization. So, the particle is manipulated in its quantum properties, like its spin or polarization, and can have multiple properties. Because of the flexibility and variation of qubits, more information can be stored on a quantum computer. Most importantly, information can be processed at an exponentially faster rate. For example, a problem that would take a conventional computer several minutes to solve due it its complexity, could be solved in less than a second by a quantum computer. This is because today’s conventional computers must go through each problem one step at a time, where a quantum computer has the ability to solve multiple problems instantaneously.