Kaolinite(and dickite)is dioctahedral 1:1 layer silicate.Owing to the influence ofdifferent geological conditions on the mineral during and after its formation,naturalkaolinite,in general,possesses different degrees o...Kaolinite(and dickite)is dioctahedral 1:1 layer silicate.Owing to the influence ofdifferent geological conditions on the mineral during and after its formation,naturalkaolinite,in general,possesses different degrees of internal structural order.Planconand Tchoubar(1977a,1977b),Tchoubar et al.(1982)established that the princi-pal type of disorder in natural kaolinite is the displacement of the vacant展开更多
In this paper, we present a scheme for teleporting multi-qudit quantum state, from the sender Alice to the receiver Charlie via many controllers Bobs, whose control parameters are obtained using entanglement swapping ...In this paper, we present a scheme for teleporting multi-qudit quantum state, from the sender Alice to the receiver Charlie via many controllers Bobs, whose control parameters are obtained using entanglement swapping of maximally d-dimensional EPR pair. In our scheme, Yang＇s qutrit controlled teleportation protocol [Commun. Theor. Phys. 49 （2008） 338] based on Bell-state entanglement swapping is generalized to the qudit case. The scheme of multi-qudit owns the advantage of having higher code capacity and better security than that of multi-qutrit.展开更多
We propose the generation of photonic EPR state from quadratic waveguide array. Both the propagation constant and the nonlinearity in the array are designed to possess a periodical modulation along the propagation dir...We propose the generation of photonic EPR state from quadratic waveguide array. Both the propagation constant and the nonlinearity in the array are designed to possess a periodical modulation along the propagation direction.This ensures that the photon pairs can be generated efficiently through the quasi-phase-matching spontaneous parametric down conversion by holding the spatial EPR entanglement in the fashion of correlated position and anticorrelated momentum. The Schmidt number which denotes the degree of EPR entanglement is calculated and it can approach a high value when the number of illuminated waveguide channels and the length of the waveguide array are properly chosen. These results suggest the quadratic waveguide array as a compact platform for engineering photonic quantum states in a high-dimensional Hilbert space.展开更多
文摘Kaolinite(and dickite)is dioctahedral 1:1 layer silicate.Owing to the influence ofdifferent geological conditions on the mineral during and after its formation,naturalkaolinite,in general,possesses different degrees of internal structural order.Planconand Tchoubar(1977a,1977b),Tchoubar et al.(1982)established that the princi-pal type of disorder in natural kaolinite is the displacement of the vacant
基金supported by Tianjin Natural Science Fund under Grant No.06YFJMJC00800
文摘In this paper, we present a scheme for teleporting multi-qudit quantum state, from the sender Alice to the receiver Charlie via many controllers Bobs, whose control parameters are obtained using entanglement swapping of maximally d-dimensional EPR pair. In our scheme, Yang＇s qutrit controlled teleportation protocol [Commun. Theor. Phys. 49 （2008） 338] based on Bell-state entanglement swapping is generalized to the qudit case. The scheme of multi-qudit owns the advantage of having higher code capacity and better security than that of multi-qutrit.
基金Supported by the State Key Program for Basic Research in China under Grant No.2012CB921802 the National Natural Science Foundations of China under Grant Nos.91321312,11321063 and 11422438
文摘We propose the generation of photonic EPR state from quadratic waveguide array. Both the propagation constant and the nonlinearity in the array are designed to possess a periodical modulation along the propagation direction.This ensures that the photon pairs can be generated efficiently through the quasi-phase-matching spontaneous parametric down conversion by holding the spatial EPR entanglement in the fashion of correlated position and anticorrelated momentum. The Schmidt number which denotes the degree of EPR entanglement is calculated and it can approach a high value when the number of illuminated waveguide channels and the length of the waveguide array are properly chosen. These results suggest the quadratic waveguide array as a compact platform for engineering photonic quantum states in a high-dimensional Hilbert space.
