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Faithful quantum entanglement sharing based on linear optics with additional qubits |
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| Authors: | Li Xi-Han Duan Xiao-Jiao Sheng Yu-Bo Zhou Hong-Yu and Deng Fu-Guo |
| Affiliation: | The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875, China; Institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875, China; Beijing Radiation Center, Beijing 100875, China; Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875, China |
| Abstract: | This paper presents a scheme for faithfully distributing a pure entanglement between two parties over an arbitrary collective-noise channel with linear optics. The transmission is assisted by an additional qubit against collective noise. The receiver can take advantage of the time discrimination and the measurement results of the assistant qubit to reconstruct a pure entanglement with the sender. Although the scheme succeeds probabilistically, the resource used to get a pure entanglement state is finite, and so is easier to establish entanglement in practice than quantum entanglement purification. |
| Keywords: | entanglement sharing quantum communication linear optics |
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