约瑟夫逊电荷量子比特纠缠的实现
张秀;惠小强
【期刊名称】《西安邮电学院学报》 【年(卷),期】2012(017)002
【摘要】In order to fully understand the implementation and control of the entanglement of solid quantum system in a superconducting Josephson charge qubit system,for a given initial state,solving the equation of evolution to study the entanglement of final-state.Then using frequency conversion manipulation to couple the two charge qubits,and choosing proper frequency Ω and interbit coupling χ,one can make a separate state or non-maximally entangled state to evolve as a maximally entangled state.This kind of super conductor Josephson junction circuit system can be acted as quantum channel to realize teleportation or acted as quantum repeater.%为了充分理解固体量子系统中量子纠缠的实现和调控,针对一种超导约瑟逊电荷量子比特电路系统,给定初态,求解演化方程研究末态的纠缠情况。通过变频操作来开关电荷量子比特之间的耦合,选择合适的调节频率Ω和耦合能χ,可以保证无纠缠或非最大纠缠的初态都能演化为最大纠缠态。这种超导约瑟夫逊电荷量子比特电路系统可以用来充当量子纠缠通道,实现信息的隐形传输,也可以充当量子中继器。 【总页数】7页(37-42,56)
【关键词】约瑟夫逊电荷比特;量子纠缠;变频操作 【作者】张秀;惠小强
约瑟夫逊电荷量子比特纠缠的实现
