dorsal/arxiv
View SchemaTransfer of nonclassical features in quantum teleportation via a mixed quantum channel
| Authors | Jinhyoung Lee, M. S. Kim, Hyunseok Jeong |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0003078 |
| URL | https://arxiv.org/abs/quant-ph/0003078 |
| DOI | 10.1103/PhysRevA.62.032305 |
| Journal | Phys. Rev. A 62, 032305 (2000) |
Abstract
Quantum teleportation of a continuous-variable state is studied for the quantum channel of a two-mode squeezed vacuum influenced by a thermal environment. Each mode of the squeezed vacuum is assumed to undergo the same thermal influence. It is found that when the mixed two-mode squeezed vacuum for the quantum channel is separable, any nonclassical features, which may be imposed in an original unknown state, cannot be transferred to a receiving station. A two-mode Gaussian state, one of which is a mixed two-mode squeezed vacuum, is separable if and only if a positive well-defined $P$ function can be assigned to it. The fidelity of teleportation is considered in terms of the noise factor given by the imperfect channel. It is found that quantum teleportation may give more noise than direct transmission of a field under the thermal environment, which is due to the fragile nature of quantum entanglement of the quantum channel.
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"abstract": "Quantum teleportation of a continuous-variable state is studied for the\nquantum channel of a two-mode squeezed vacuum influenced by a thermal\nenvironment. Each mode of the squeezed vacuum is assumed to undergo the same\nthermal influence. It is found that when the mixed two-mode squeezed vacuum for\nthe quantum channel is separable, any nonclassical features, which may be\nimposed in an original unknown state, cannot be transferred to a receiving\nstation. A two-mode Gaussian state, one of which is a mixed two-mode squeezed\nvacuum, is separable if and only if a positive well-defined $P$ function can be\nassigned to it. The fidelity of teleportation is considered in terms of the\nnoise factor given by the imperfect channel. It is found that quantum\nteleportation may give more noise than direct transmission of a field under the\nthermal environment, which is due to the fragile nature of quantum entanglement\nof the quantum channel.",
"arxiv_id": "quant-ph/0003078",
"authors": [
"Jinhyoung Lee",
"M. S. Kim",
"Hyunseok Jeong"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.62.032305",
"journal_ref": "Phys. Rev. A 62, 032305 (2000)",
"title": "Transfer of nonclassical features in quantum teleportation via a mixed quantum channel",
"url": "https://arxiv.org/abs/quant-ph/0003078"
},
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