dorsal/arxiv
View SchemaFaithful and deterministic teleportation of an arbitrary $N$-qubit state using and identifying only Bell states
| Authors | Zhan-jun Zhang |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0504126 |
| URL | https://arxiv.org/abs/quant-ph/0504126 |
Abstract
First, I show explicitly a scheme to {\it faithfully} and {\it deterministically} teleport an arbitrary 2-qubit state from Alice to Bob. In this scheme two same Bell states are sufficient for use. Bob can recover the 2-qubit state by performing at most 4 single-qubit unitary operations conditioned on Alice's 4-bit classical public message corresponding to her two Bell-state measurement outcomes. Then I generalize the 2-qubit teleportation scheme to an aribitrary $N(N\ge 3)$-qubit state teleportation case by using $N$ same Bell states. In the generalized scheme, Alice only needs to identify $N$ Bell states after quantum swapping and then publish her measurement outcomes ($2N$-bit classical message). Conditioned on Alice's $2N$-bit classical message, Bob only needs to perform at most $2N$ single-qubit unitary operations to {\it fully} recover the arbitrary state. By comparing with the newest relevant work [Phys. Rev. A{\bf 71}, 032303(2005)], the advantages of the present schemes are revealed, respectively.
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"abstract": "First, I show explicitly a scheme to {\\it faithfully} and {\\it\ndeterministically} teleport an arbitrary 2-qubit state from Alice to Bob. In\nthis scheme two same Bell states are sufficient for use. Bob can recover the\n2-qubit state by performing at most 4 single-qubit unitary operations\nconditioned on Alice\u0027s 4-bit classical public message corresponding to her two\nBell-state measurement outcomes. Then I generalize the 2-qubit teleportation\nscheme to an aribitrary $N(N\\ge 3)$-qubit state teleportation case by using $N$\nsame Bell states. In the generalized scheme, Alice only needs to identify $N$\nBell states after quantum swapping and then publish her measurement outcomes\n($2N$-bit classical message). Conditioned on Alice\u0027s $2N$-bit classical\nmessage, Bob only needs to perform at most $2N$ single-qubit unitary operations\nto {\\it fully} recover the arbitrary state. By comparing with the newest\nrelevant work [Phys. Rev. A{\\bf 71}, 032303(2005)], the advantages of the\npresent schemes are revealed, respectively.",
"arxiv_id": "quant-ph/0504126",
"authors": [
"Zhan-jun Zhang"
],
"categories": [
"quant-ph"
],
"title": "Faithful and deterministic teleportation of an arbitrary $N$-qubit state using and identifying only Bell states",
"url": "https://arxiv.org/abs/quant-ph/0504126"
},
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