Dependence of Fidelity of Quantum Teleportation for Pure State on Degree of Entanglement

Abstract

Quantum information and computation has been a rapidly evolving field. As Landauer pointed out, information is physical, so it should not look strange to try to bring together quantum mechanics and information theory. Indeed, it was soon realized that it was possible to use the laws of quantum physics to perform tasks which are unconceivable within the framework of classical physics like quantum teleportation, superdense coding, quantum cryptography, Shor’s factorization algorithm or Grover’s searching algorithm. Here, quantum teleportation has been discussed in a different way for two qubit pure state. It is a well-known fact that any two qubit pure states can be decomposed into two parts – pure entangled part and factorizable part. The square of the weightage of entangled part (p) gives the amount of entanglement in the state. It has been shown that the fidelity of quantum teleportation is a function of p and its variation with p has been plotted for all the possible outcomes.

Keywords:quantum mechanics, teleportation, Fidelity