dorsal/arxiv
View SchemaFidelity of Gaussian channels
| Authors | Carlton M. Caves, Krzysztof Wodkiewicz |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0409063 |
| URL | https://arxiv.org/abs/quant-ph/0409063 |
Abstract
A noisy Gaussian channel is defined as a channel in which an input field mode is subjected to random Gaussian displacements in phase space. We introduce the quantum fidelity of a Gaussian channel for pure and mixed input states, and we derive a universal scaling law of the fidelity for pure initial states. We also find the maximum fidelity of a Gaussian channel over all input states. Quantum cloning and continuous-variable teleportation are presented as physical examples of Gaussian channels to which the fidelity results can be applied.
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"abstract": "A noisy Gaussian channel is defined as a channel in which an input field mode\nis subjected to random Gaussian displacements in phase space. We introduce the\nquantum fidelity of a Gaussian channel for pure and mixed input states, and we\nderive a universal scaling law of the fidelity for pure initial states. We also\nfind the maximum fidelity of a Gaussian channel over all input states. Quantum\ncloning and continuous-variable teleportation are presented as physical\nexamples of Gaussian channels to which the fidelity results can be applied.",
"arxiv_id": "quant-ph/0409063",
"authors": [
"Carlton M. Caves",
"Krzysztof Wodkiewicz"
],
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"title": "Fidelity of Gaussian channels",
"url": "https://arxiv.org/abs/quant-ph/0409063"
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