Quantum communication using quantum teleportation

摘要

A method and apparatus for sending encrypted data across a node in a communications network. In one illustrative embodiment, an apparatus comprises a first communicator, a second communicator, and a number of nodes. The first communicator is configured to encrypt unencrypted data to form the encrypted data using a first quantum key distributor. The second communicator is configured to decrypt the encrypted data using a second quantum key distributor. The number of nodes is configured to receive the encrypted data sent from the first communicator and send the encrypted data to the second communicator using quantum teleportation. The encrypted data remains encrypted as the encrypted data passes through each of the number of nodes.

主权项

1. An apparatus comprising:
a first communicator configured to encrypt unencrypted data to form encrypted data using a first quantum key distributor; a second communicator configured to decrypt the encrypted data using a second quantum key distributor; a node configured to receive the encrypted data sent from the first communicator and send the encrypted data to the second communicator using quantum teleportation, wherein the encrypted data remains encrypted as the encrypted data passes through the node; an entanglement creator configured to create a first photon and a second photon, the first photon and the second photon being in an entangled quantum state, wherein the entanglement creator is configured to transmit the first photon to an entanglement remover and the second photon to one of a next node or the second communicator; and an entanglement remover configured to receive both the first photon and an incoming photon transmitted by the first communicator, wherein the entanglement remover is further figured to cause the incoming photon and the first photon to interfere with each other, thereby generating at least one output photon, and wherein the entanglement remover is further configured to subsequently measure a property of the at least one output photon and thereby remove entanglement between the first photon and the second photon and simultaneously transfer a quantum state of the incoming photon to the second photon.