dorsal/arxiv
View SchemaQuantum Feedback Channels
| Authors | Garry Bowen |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0209076 |
| URL | https://arxiv.org/abs/quant-ph/0209076 |
| DOI | 10.1109/TIT.2004.834749 |
| Journal | IEEE Trans. Inform. Theory 50, 2429-2433 (2004) |
Abstract
In Shannon information theory the capacity of a memoryless communication channel cannot be increased by the use of feedback. In quantum information theory the no-cloning theorem means that noiseless copying and feedback of quantum information cannot be achieved. In this paper, quantum feedback is defined as the unlimited use of a noiseless quantum channel from receiver to sender. Given such quantum feedback, it is shown to provide no increase in the entanglement--assisted capacities of a memoryless quantum channel, in direct analogy to the classical case. It is also shown that in various cases of non-assisted capacities, feedback may increase the capacity of memoryless quantum channels.
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"abstract": "In Shannon information theory the capacity of a memoryless communication\nchannel cannot be increased by the use of feedback. In quantum information\ntheory the no-cloning theorem means that noiseless copying and feedback of\nquantum information cannot be achieved. In this paper, quantum feedback is\ndefined as the unlimited use of a noiseless quantum channel from receiver to\nsender. Given such quantum feedback, it is shown to provide no increase in the\nentanglement--assisted capacities of a memoryless quantum channel, in direct\nanalogy to the classical case. It is also shown that in various cases of\nnon-assisted capacities, feedback may increase the capacity of memoryless\nquantum channels.",
"arxiv_id": "quant-ph/0209076",
"authors": [
"Garry Bowen"
],
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"quant-ph"
],
"doi": "10.1109/TIT.2004.834749",
"journal_ref": "IEEE Trans. Inform. Theory 50, 2429-2433 (2004)",
"title": "Quantum Feedback Channels",
"url": "https://arxiv.org/abs/quant-ph/0209076"
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