We design and implement a live migration acceleration system (LMAS) that supports long distance live migration by using parallel TCP. Our prototype system works perfectly for VMware VMotion and Citrix XenMotion withou...
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作者：
Li, JunhuiYu, QuanfuLiu, YuGuo, HongCREAM Group
State Key Lab. of Advanced Optical Communication Systems and Networks Inst. of Quantum Electronics School of Electronics Engineering and Computer Science Peking University Beijing 100871 China
Violation of Bell inequality cannot guarantee non-locality, thus an applicable hacking scheme on device-independent Bell test based quantum randomness expansion is given, together with a more secure upper bound on gen...
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We demonstrate polarization-based binary all-optical logic functions, such as controlled-NOT, AND and OR gates through electro-optic Pockels effect of PPLN. By using these gates with others, Complicated Boolean calcul...
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We propose and demonstrate a cost-effective wireless over optical fiber access system using frequency quintupling technique. A 2.5-Gb/s OOK signal at 60-GHz is successfully transmitted through 30-km SSMF and 10-ft air...
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We design and implement a live migration acceleration system (LMAS) that supports long distance live migration by using parallel TCP. Our prototype system works perfectly for VMware VMotion and Citrix XenMotion withou...
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We design and implement a live migration acceleration system (LMAS) that supports long distance live migration by using parallel TCP. Our prototype system works perfectly for VMware VMotion and Citrix XenMotion without modifying the hypervisors. Experiments show that LMAS reduces total time of long distance live migration effectively.
A series of quantum voting protocols of continuous variables is proposed. Three methods are employed to ensure that the quantum voting obeys some desirable rules. Entanglement is used to keep voters away from the voti...
A series of quantum voting protocols of continuous variables is proposed. Three methods are employed to ensure that the quantum voting obeys some desirable rules. Entanglement is used to keep voters away from the voting results. We enable voters to operate identically to represent the same vote to prevent the tallyman from gaining information about individual voters. We also propose an effective scheme to prevent voters from voting more than once. In both two-valued and multivalued ballot protocols, several specific constraints are set to meet the rules.
作者：
谢俊陈玉萍陆闻杰陈险峰Department of Physics
State Key Laboratory on Fiber-Optic Local Area Network and Advanced Optical Communication SystemsShanghai Jiaotong University
Based on the second-order nonlinearity, we present a bidirectional tunable all-optical switch at C-band by introducing backward quasi-phase-matching technique in Mg-doped periodically poled lithium niobate （MgO：PPLN...
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Based on the second-order nonlinearity, we present a bidirectional tunable all-optical switch at C-band by introducing backward quasi-phase-matching technique in Mg-doped periodically poled lithium niobate （MgO：PPLN） waveguide with a nano-structure called multiple resonators. Two injecting forward lights and one backward propagating light interact with difference frequency generations. The transmission of forward signal and backward idler light can be modulated simultaneously with the variation of control light power based on the basic ＂phase shift＂ structure of a single resonator. In this scheme, all the results come from our simulation. The speed of this bidirectional optical switch can reach to femtosecond if a femtosecond laser is used as the control light.
An effective signal detection algorithm with low complexity is presented for MIMO-OFDM systems. The proposed technique combines a dynamic QR decomposition based M-Algorithm (QRDM) and Zero-Forcing (ZF) detection. In t...
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ISBN:
(纸本)9781612846842
An effective signal detection algorithm with low complexity is presented for MIMO-OFDM systems. The proposed technique combines a dynamic QR decomposition based M-Algorithm (QRDM) and Zero-Forcing (ZF) detection. In the systems, QRDM is executed for the first N_T-[N_T/3]+1 layers, ZF detection is used for the last [N_r/3]-1 layers, where N_T means the number of transmitter antennas. Compared with the conventional QRDM algorithm, this approach is simple and has low complexity because not all branches are searched. Furthermore, the performance of this algorithm is similar to that of the conventional QRDM algorithm. The receiver detection simulation is based on five paths Rayleigh fading environment without channel coding, assuming the channel matrix H is perfectly known by the detector. From simulation results, the complexity of QRDM-ZF detection algorithm for 4 transmitter antennas and 4 receiver antennas systems with quadra-binary-shift-keying (QBSK) modulation is reduced by 29.41% on average and it is reduced by 30.08% on average for 16-quadra-amplitude-modulation (QAM). The performance degradation is about 2dB at BER=10~(-3). The proposed hybrid QRDM-ZF detection can be used for a MIMO-OFDM receiver requiring not very high performance but needing very low complexity.
In this paper, we investigate experimentally an integrated quantum secure communication system using weak coherent state. Two modules are involved in the presented system. One is used for generating the secret key whi...
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In this paper, we investigate experimentally an integrated quantum secure communication system using weak coherent state. Two modules are involved in the presented system. One is used for generating the secret key which is obtained using continuous variable quantum key distribution scheme, and the other serves to encrypt and decrypt the real-time private data using a pure quantum cryptographic algorithm. The sifted key rate with reverse reconciliation is 8.6 and 3.9 kb/s in the quantum key distribution scheme under the individual attack and the collective attack, respectively. The system uses an all-fiber dual unbalance beam Mach-Zehnder interferometer, and is implemented with a 500 kb/s modulation rate over 27.2 km of optical fiber.
We propose to use SBS effect to enable high speed data security. A 10.86-Gb/s NRZ -OOK data is encrypted by a SBS loss and decrypted by a corresponding SBS gain with 1-dB power penalty.
ISBN:
(纸本)9781467362740
We propose to use SBS effect to enable high speed data security. A 10.86-Gb/s NRZ -OOK data is encrypted by a SBS loss and decrypted by a corresponding SBS gain with 1-dB power penalty.
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