Capacity of Memory Quantum Channels

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Mani Varnoosfaderani, Azam | 2009

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 39117 (04)
University: Sharif University of Technology
Department: Physics
Advisor(s): Karimipour, Vahid
Abstract:
One of the most important problems of quantum information theory is to try to determine the channel capacity of noisy quantum channels. Alice would like to send Bob information over many uses of a noisy quantum communication link. As the line is usually noisy, this cannot be done perfectly, and so they must use suitable coding methods to minimize the error. Different coding methods yield different rates of information transition and different errors, the channel capacity is defined as the maximum rate at which information may be transferred with vanishing error in the limit of a large number of channel uses. There are a variety of different capacities, depending upon whether Alice and Bob are interested in transmitting classical or quantum information, and whether they have extra resources such as prior entanglement. In this thesis we will be concerned with the capacity for sending quantum information through memory quantum channels, and by introducing a model for these channels, we find a formula for their capacity. Finally in chapter seven by use of this formula we consider changes of the capacity with temprature for some quantum channels
Keywords:
Information ; Quantum Channel ; Channel Capacity

No TOC