Parallel Photonic Quantum Computation Assisted by Quantum Dots in One-Side Optical Microcavities

被引：38
作者：
Luo, Ming-Xing [1 ,2 ,3 ]
Wang, Xiaojun [4 ]
机构：
[1] Southwest Jiaotong Univ, Informat Secur & Natl Comp Grid Lab, Chengdu 610031, Peoples R China
[2] Beijing Univ Posts & Telecommun, State Key Lab Networking & Switching Technol, Beijing 100876, Peoples R China
[3] Grad Univ Chinese Acad Sci, State Key Lab Informat Secur, Beijing 100049, Peoples R China
[4] Dublin City Univ, Sch Elect Engn, Dublin 9, Ireland
来源：
SCIENTIFIC REPORTS | 2014年 / 4卷
基金：
中国国家自然科学基金; 爱尔兰科学基金会;
关键词：
SPIN; GATE; RESONANCE; STATE;
D O I：
10.1038/srep05732
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Universal quantum logic gates are important elements for a quantum computer. In contrast to previous constructions on one degree of freedom (DOF) of quantum systems, we investigate the possibility of parallel quantum computations dependent on two DOFs of photon systems. We construct deterministic hyper-controlled-not (hyper-CNOT) gates operating on the spatial-mode and the polarization DOFs of two-photon or one-photon systems by exploring the giant optical circular birefringence induced by quantum-dot spins in one-sided optical microcavities. These hyper-CNOT gates show that the quantum states of two DOFs can be viewed as independent qubits without requiring auxiliary DOFs in theory. This result can reduce the quantum resources by half for quantum applications with large qubit systems, such as the quantum Shor algorithm.
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页数：8
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