Generation of Quantum Correlation by the Environment

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Rezazadeh, Fatemeh | 2014

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 46503 (04)
University: Sharif University of Technology
Department: Physics
Advisor(s): Memarzadeh, Laleh
Abstract:
In most of quantum information protocols, entanglement or, in general expression, quantum correlation, plays the major role. So it is very important to know the ways of generating entanglement and protecting it against noise.
In a general view, environment is usually known as a destructive agent for entangled states. Being exposed to environment, non-diagonal elements of an entangled state’s density matrix would tend to zero, because of decoherence effect. Thus, the entanglement would be disappear. But, recent studies have shown that, this destructive agent can be convert to a useful agent for generating entanglement between system components.
In this thesis, at first, the possibility of generating entanglement in relation with environment will be reviewed. Then, we would survey producing quantum correlations in relation with environment for two qubits that haven`t any direct intraction. And finally, in a survey on local generating quantum correlations, we would introduce a necessary condition for generating quantum correlation between two qubits by local markovian environment. Then, this results will be compared with the results gained about channals
Keywords:
Quantum Correlation ; Entanglement ; Open Quantum System ; Markovian Evolution ; Quantum Correlation Beyond Entanglement

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