title: Controlled Photon Switch Assisted by Coupled Quantum Dots.
abstract: Quantum switch is a primitive element in quantum network communication. In contrast to previous switch schemes on one degree of freedom (DOF) of quantum systems, we consider controlled switches of photon system with two DOFs. These controlled photon switches are constructed by exploring the optical selection rules derived from the quantum-dot spins in one-sided optical microcavities. Several double controlled-NOT gate on different joint systems are greatly simplified with an auxiliary DOF of the controlling photon. The photon switches show that two DOFs of photons can be independently transmitted in quantum networks. This result reduces the quantum resources for quantum network communication.
authors.affiliation: 1] Information Security and National Computing Grid Laboratory, Southwest Jiaotong University, Chengdu 610031, China [2] State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China.
authors.forename: Ming-Xing
authors.initials: MX
authors.lastname: Luo
authors.affiliation: School of Mathematics and Statistics, Henan University, Kaifeng 475004, China.
authors.forename: Song-Ya
authors.initials: SY
authors.lastname: Ma
authors.affiliation: State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China.
authors.forename: Xiu-Bo
authors.initials: XB
authors.lastname: Chen
authors.affiliation: School of Electronic Engineering, Dublin City University, Dublin 9, Ireland.
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Wang