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17 papers · 2 filters
Idealization Second Quantization of Composite Particles
D. L. Zhou, S. Y. Yu, C. P. Sun
A practical method is developed to deal with the second quantization of the many-body system containing the composite particles. In our treatment, the modes associated with composi…
Theoretical efficient high capacity Quantum Key Distribution Scheme
Gui Lu Long, Xiao Shu Liu
A theoretical quantum key distribution scheme using EPR pairs is presented. This scheme is efficient in that it uses all EPR pairs in distributing the key except those chosen for c…
Analysis of Density Matrix reconstruction in NMR Quantum Computing
G. L. Long, H. Y. Yan, Yang Sun
Reconstruction of density matrices is important in NMR quantum computing. An analysis is made for a 2-qubit system by using the error matrix method. It is found that the state tomo…
Creating Bell states and decoherence effects in quantum dots system
X. X. Yi, G. R. Jin, D. L. Zhou
We show how to improve the efficiency for preparing Bell states in coupled two quantum dots system. A measurement to the state of driven quantum laser field leads to wave function…
Localization of Macroscopic Object Induced by the Factorization of Internal Adiabatic Motion
C. P. Sun, X. F. liu, D. L. Zhou +1
To account for the phenomenon of quantum decoherence of a macroscopic object, such as the localization and disappearance of interference, we invoke the adiabatic quantum entangleme…
Experimental NMR Realization of A Generalized Quantum Search Algorithm
G. L. Long, H. Y. Yan, Y. S. Li +8
A generalized quantum search algorithm, where phase inversions for the marked state and the prepared state are replaced by phase rotations, is realized in a 2-qubit NMR heter…