Symmetric Telecloning and Entanglement Distribution of Spin Quantum States
WANG Qiong, LI Ji-Xin, ZANG Hao-Sheng
Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, Changsha 410081
Symmetric Telecloning and Entanglement Distribution of Spin Quantum States
WANG Qiong, LI Ji-Xin, ZANG Hao-Sheng
Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, and Department of Physics, Hunan Normal University, Changsha 410081
摘要We propose a physical realization of symmetric telecloning machine for spin quantum states. The concept of area average fidelity is introduced to describe the telecloning quality. It is indicated that for certain input states this quantity may come to an enough high level to satisfy the need of quantum information processing. We also study the properties of entanglement distribution via the spin chain for arbitrary two-qubit entangled pure states as inputs and find that the decay ratio of entanglement for the output states is only determined by the parameters of spin chain and waiting time, independent of the initial input states.
Abstract:We propose a physical realization of symmetric telecloning machine for spin quantum states. The concept of area average fidelity is introduced to describe the telecloning quality. It is indicated that for certain input states this quantity may come to an enough high level to satisfy the need of quantum information processing. We also study the properties of entanglement distribution via the spin chain for arbitrary two-qubit entangled pure states as inputs and find that the decay ratio of entanglement for the output states is only determined by the parameters of spin chain and waiting time, independent of the initial input states.
(Quantum computation architectures and implementations)
引用本文:
WANG Qiong;LI Ji-Xin;ZANG Hao-Sheng. Symmetric Telecloning and Entanglement Distribution of Spin Quantum States[J]. 中国物理快报, 2008, 25(8): 2770-2773.
WANG Qiong, LI Ji-Xin, ZANG Hao-Sheng. Symmetric Telecloning and Entanglement Distribution of Spin Quantum States. Chin. Phys. Lett., 2008, 25(8): 2770-2773.