What is a Qubit?
The qubit is an example of a quantum bit. In quantum computing, the qubit serves as the counterpart to the binary digit, which is normally known as a bit. A binary digit serves as the most basic unit of information in a classical computer. In like manner, the qubit serves as the most basic unit of information in a quantum computer. With a quantum computer, these quantum bits or qubits are essentially photon or electron particles that carry a polarization or charge that is either positive or negative. The charge of the qubit is read in the actual programming as either a “0” or a “1.” It is the interrelation and performance of these charged particles that provide the basic functionality of quantum computing, as the function is based in quantum theory. The function of the qubit is governed by two principles that are basic to the idea of quantum physics. One of these principles is superposition. In terms of the qubit, superposition has to do with how the qubit performs within a magnetic fi
A Qubit is the basic unit of information in a quantum computer. While a bit can represent just one of two possibilities such as 0 or 1, or yes or not, a Qubit can represent more: 0 or 1, 1 and 0, the probability of any occurrence when combined with more Qubits, and all that simultaneously. So, while a bit represents just 1 or 0, one Qubit represents an array of possibilities and all can be calculated simultaneously taking probabilities in account. What is its scientific explanation ? The Qubit concept came from Quantum Mechanics that deals with very small particles (subatomic particles). It has been proven that a subatomic particle can have different states simultaneously because when the particle momentum (mass and velocity) is measured, the particle changes. This is evident for particles moving very fast, close to light velocity So, a particle momentum looks different to different observers and the particle has several states simultaneously. For one observer, the probability of the p