dorsal/arxiv
View SchemaAsymmetric quantum channel for quantum teleportation
| Authors | M. S. Kim, Jinhyoung Lee |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0005022 |
| URL | https://arxiv.org/abs/quant-ph/0005022 |
| DOI | 10.1103/PhysRevA.64.012309 |
Abstract
There are a few obstacles, which bring about imperfect quantum teleportation of a continuous variable state, such as unavailability of maximally entangled two-mode squeezed states, inefficient detection and imperfect unitary transformation at the receiving station. We show that all those obstacles can be understood by a combination of an {\it asymmetrically-decohered} quantum channel and perfect apparatuses for other operations. For the asymmetrically-decohered quantum channel, we find some counter-intuitive results; one is that teleportation does not necessarily get better as the channel is initially squeezed more and another is when one branch of the quantum channel is unavoidably subject to some imperfect operations, blindly making the other branch as clean as possible may not result in the best teleportation result. We find the optimum strategy to teleport an unknown field for a given environment or for a given initial squeezing of the channel.
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"abstract": "There are a few obstacles, which bring about imperfect quantum teleportation\nof a continuous variable state, such as unavailability of maximally entangled\ntwo-mode squeezed states, inefficient detection and imperfect unitary\ntransformation at the receiving station. We show that all those obstacles can\nbe understood by a combination of an {\\it asymmetrically-decohered} quantum\nchannel and perfect apparatuses for other operations. For the\nasymmetrically-decohered quantum channel, we find some counter-intuitive\nresults; one is that teleportation does not necessarily get better as the\nchannel is initially squeezed more and another is when one branch of the\nquantum channel is unavoidably subject to some imperfect operations, blindly\nmaking the other branch as clean as possible may not result in the best\nteleportation result. We find the optimum strategy to teleport an unknown field\nfor a given environment or for a given initial squeezing of the channel.",
"arxiv_id": "quant-ph/0005022",
"authors": [
"M. S. Kim",
"Jinhyoung Lee"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.64.012309",
"title": "Asymmetric quantum channel for quantum teleportation",
"url": "https://arxiv.org/abs/quant-ph/0005022"
},
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