What is quantum teleportation

" Classical information (or state), such as the content of this abstract or the genetic information contained in a human embryo, canbe copied or cloned. Quantum information (or state), however, cannot be cloned with perfect fidelity since measurement in quantum mechanics inevitably disrupts the state of the measured system. Therefore, under the presence of environmental decoherence, if Alice transmits a quantum bit or a qubit (with unknown quantum state) to Bob, there is no way to check if the received qubit is indeed the same as what Alice had sent. This would present a serious problem to quantum information processing. It is, however, possible to "teleport" Alices qubit to Bob without actually sending the qubit itself. The essence of quantum teleportation is the entangled qubit pairs shared a priori between Alice and Bob. In this talk, after a brief introduction to quantum no-cloning theorem and the teleportation protocol, I will discuss how quantum teleportation is actually implemented in laboratory. "