Properties on the distant distribution of entanglement for arbitrary two-qubit pure states via noisy quantum channels |
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| Authors: | Wang Qiong Li Ji-Xin Zeng Hao-Sheng |
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| Affiliation: | Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education,and Department of Physics, Hunan Normal University, Changsha 410081, China |
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| Abstract: | ![]()
This paper investigates the change of entanglement for transmittingan arbitrarily entangled two-qubit pure state via one of threetypical kinds of noisy quantum channels: amplitude dampingquantum channel, phase damping quantum channel and depolarizingquantum channel. It finds, in all these three cases, that the outputdistant entanglement (measured by concurrence) reducesproportionately with respect to its initial amount, and the decayingratio is determined only by the noisy characteristics of quantumchannels and independent of the form of initial input state. |
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| Keywords: | entanglement distribution quantum noisy channel concurrence |
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