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The power of entangled quantum channels
Seth Lloyd
abstract: All communication channels are at bottom quantum mechanical. Quantum
mechanics contributes both obstacles to communication in the form of noise, and
opportunities in the use of intrinsically quantum representations for
information. This paper investigates the trade-off between power and
communication rate for coupled quantum channels. By exploiting quantum
correlations such as entanglement, coupled quantum channels can communicate at
a potentially higher rate than unentangled quantum channels given the same
power. In particular, given the same overall power, M coupled, entangled
quantum channels can send M bits in the same time it takes a single channel to
send a single bit, and in the same time it takes M unentangled channels to send
$\sqrt M$ bits.
- oai_identifier:
- oai:arXiv.org:quant-ph/0112034
- categories:
- quant-ph
- comments:
- 12 pages, 2 figures
- arxiv_id:
- quant-ph/0112034
- created:
- 2001-12-06
Full article ▸
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