Generation and complete nondestructive analysis of hyperentanglement assisted by nitrogen-vacancy centers in resonators

被引:76
作者
Liu, Qian [1 ]
Zhang, Mei [1 ]
机构
[1] Beijing Normal Univ, Dept Phys, Appl Opt Beijing Area Major Lab, Beijing 100875, Peoples R China
来源
PHYSICAL REVIEW A | 2015年 / 91卷 / 06期
基金
中国国家自然科学基金;
关键词
SINGLE SPINS; ENTANGLEMENT; PHOTON; COHERENCE; DYNAMICS; QUBITS; SERVER;
D O I
10.1103/PhysRevA.91.062321
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We present two efficient schemes for the deterministic generation and the complete nondestructive analysis of hyperentangled Bell states in both the polarization and spatial-mode degrees of freedom (DOFs) of two-photon systems, assisted by the nitrogen-vacancy (NV) centers in diamonds coupled to microtoroidal resonators as a result of cavity quantum electrodynamics. With the input-output process of photons, two-photon polarization-spatial hyperentangled Bell states can be generated in a deterministic way and their complete nondestructive analysis can be achieved. These schemes can be generalized to generate and analyze hyperentangled Greenberger-Horne-Zeilinger states of multiphoton systems as well. Compared with previous works, these two schemes relax the difficulty of their implementation in experiment as it is not difficult to obtain the pi phase shift in single-sided NV-cavity systems, but difficult in single-sided quantum-dot-cavity systems. Moreover, our schemes do not require that the transmission for the uncoupled cavity is balanceable with the reflectance for the coupled cavity and they can be operated at room temperature. Our calculations show that these schemes can reach a high fidelity and efficiency with current technology, which may be a benefit to long-distance high-capacity quantum communication with two DOFs of photon systems.
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页数:9
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