Importance of quantum entanglement

Abstract

An electron has a binary intrinsic property (spin “up” and “down”) and can have binary shifts (move to the right or left). Its spin can be combination of these two, and can have moves that can be combinations of those two. It can also be formed four pairs (intrinsic property, motion): up-left, up-right, down-left, down right. Even combinations of these four possibilities, which is an example of quantum entanglement. Similarly, photons have a binary intrinsic property, polarization. John Clauser and Alain Aspect experimentally observed that photon pairs can be in quantum entangled states formed with their polarization states. The third 2022 Nobel laureate in physics, along with the above researchers, Anton Zeilinger, experimentally demonstrated that quantum entanglement is applicable in information and quantum communication. Such applications, along with the quantum computing, quantum metrology, quantum microscopy, and others technologies, are called the “second quantum revolution”.