Engineering
The terahertz frequency range—which sits in the middle of the electromagnetic spectrum between microwaves and infrared light—offers the potential for high-bandwidth communications, ultrahigh-resolution imaging, precise ...
Nov 18, 2019
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Telecom
Fraunhofer ISI and Saarland University have analyzed three generations of quantum communication in a new study. The study's quantitative monitoring gives insights into patent development, projects future growth, and compares ...
16 hours ago
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In quantum information theory, a quantum channel is a communication channel which can transmit quantum information, as well as classical information. An example of quantum information is the state of a qubit. An example of classical information is a text document transmitted over the internet.
More formally, quantum channels are completely positive, trace preserving maps between spaces of operators, as defined more precisely below.
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