摘要
研究了去高斯双模压缩真空场的光子分布,并以J-C模型计算分析了场到量子比特的纠缠传输.采用负度表征纠缠.研究表明减光子双模压缩真空场在较低压缩度下产生高纠缠度,场的光子分布随光子数减小向贝尔基趋近,传递到量子比特的纠缠相应提高;加光子双模压缩真空场的光子分布在压缩度趋于0的极限下变为贝尔基,连续变量系统演化为离散变量系统,纠缠可以完全传递到量子比特.
We researched the photon distribution of de-Gaussian two-mode squeezed vacuum field, analyzed the transferred entanglement between the field and Qubits based on J-C model, characterize entanglement by logarithmic negativity. The results show that the photon-subtracted field can achieve high entanglement at lower squeezing degree, photon distribution will change to Bell-basis with subtracting photon and enhance the transferred entanglement; the photon-added ones will be Bell-basis when squeezing degree is O, and the entanglement can be completely transferred.
出处
《哈尔滨理工大学学报》
CAS
2013年第5期108-110,114,共4页
Journal of Harbin University of Science and Technology
基金
黑龙江省教育厅科学技术研究项目(12511119)
关键词
双模压缩真空场
去高斯
光子分布
纠缠传输
two-mode squeezed field
de-Gaussian
photon distribution
entanglement transfer
