Abstract
Quantum information processing exploits the quantum nature of information. It offers fundamentally new solutions in the field of computer science and extends the possibilities to a level that cannot be imagined in classical communication systems. For quantum communication channels, many new capacity definitions were developed in comparison to classical counterparts. A quantum channel can be used to realize classical information transmission or to deliver quantum information, such as quantum entanglement. Here we review the properties of the quantum communication channel, the various capacity measures and the fundamental differences between the classical and quantum channels.
Highlights
A CCORDING to Moore’s Law [322], the physical limitations of classical semiconductor-based technologies could be reached within the few years
1) Discussion: Before starting the discussion on various capacities of quantum channels and the related consequences we summarize the basic definitions and formulas of quantum information theory intended to represent the information stored in quantum states
2) Density Matrix and Trace Operator: we introduce a basic concept of quantum information theory, called the density matrix
Summary
Laszlo Gyongyosi , Member, IEEE, Sandor Imre, Senior Member, IEEE, and Hung Viet Nguyen, Member, IEEE. Abstract—Quantum information processing exploits the quantum nature of information. It offers fundamentally new solutions in the field of computer science and extends the possibilities to a level that cannot be imagined in classical communication systems. Many new capacity definitions were developed in comparison to classical counterparts. A quantum channel can be used to realize classical information transmission or to deliver quantum information, such as quantum entanglement. We review the properties of the quantum communication channel, the various capacity measures and the fundamental differences between the classical and quantum channels
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