dorsal/arxiv
View SchemaControlled quantum teleportation and secure direct communication
| Authors | T Gao, F L Yan, Z X Wang |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0403155 |
| URL | https://arxiv.org/abs/quant-ph/0403155 |
| DOI | 10.1088/1009-1963/14/5/006 |
| Journal | Chinese Physics, 14 (2005) 893. |
Abstract
We present a controlled quantum teleportation protocol. In the protocol, quantum information of an unknown state of a 2-level particle is faithfully transmitted from a sender (Alice) to a remote receiver (Bob) via an initially shared triplet of entangled particles under the control of the supervisor Charlie. The distributed entangled particles shared by Alice, Bob and Charlie function as a quantum information channel for faithful transmission. We also propose a controlled and secure direct communication scheme by means of this teleportation. After insuring the security of the quantum channel, Alice encodes the secret message directly on a sequence of particle states and transmits them to Bob supervised by Charlie using this controlled quantum teleportation. Bob can read out the encoded message directly by the measurement on his qubit. In this scheme, the controlled quantum teleportation transmits Alice's message without revealing any information to a potential eavesdropper. Because there is not a transmission of the qubit carrying the secret message between Alice and Bob in the public channel, it is completely secure for controlled and direct secret communication if perfect quantum channel is used. The feature of this scheme is that the communication between two sides depends on the agreement of the third side.
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"abstract": "We present a controlled quantum teleportation protocol. In the protocol,\nquantum information of an unknown state of a 2-level particle is faithfully\ntransmitted from a sender (Alice) to a remote receiver (Bob) via an initially\nshared triplet of entangled particles under the control of the supervisor\nCharlie. The distributed entangled particles shared by Alice, Bob and Charlie\nfunction as a quantum information channel for faithful transmission. We also\npropose a controlled and secure direct communication scheme by means of this\nteleportation. After insuring the security of the quantum channel, Alice\nencodes the secret message directly on a sequence of particle states and\ntransmits them to Bob supervised by Charlie using this controlled quantum\nteleportation. Bob can read out the encoded message directly by the measurement\non his qubit. In this scheme, the controlled quantum teleportation transmits\nAlice\u0027s message without revealing any information to a potential eavesdropper.\nBecause there is not a transmission of the qubit carrying the secret message\nbetween Alice and Bob in the public channel, it is completely secure for\ncontrolled and direct secret communication if perfect quantum channel is used.\nThe feature of this scheme is that the communication between two sides depends\non the agreement of the third side.",
"arxiv_id": "quant-ph/0403155",
"authors": [
"T Gao",
"F L Yan",
"Z X Wang"
],
"categories": [
"quant-ph"
],
"doi": "10.1088/1009-1963/14/5/006",
"journal_ref": "Chinese Physics, 14 (2005) 893.",
"title": "Controlled quantum teleportation and secure direct communication",
"url": "https://arxiv.org/abs/quant-ph/0403155"
},
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