The entanglement characteristics including the so-called sudden death effect between two identical two-levelatoms trapped in two separate cavities connected by an optical fiber are studied.The results show that the ti...The entanglement characteristics including the so-called sudden death effect between two identical two-levelatoms trapped in two separate cavities connected by an optical fiber are studied.The results show that the timeevolution of entanglement is sensitive not only to the degree of entanglement of the initial state but also to the ratiobetween cavity-fiber coupling (v) and atom-cavity coupling (g).This means that the entanglement dynamics can becontrolled by choosing specific v and g.展开更多
fn this paper we propose a scheme for transferring quantum states and preparing quantum networks.Compared with the previous schemes,this scheme is more efficient,since three or four-dimensional quantum states canbe tr...fn this paper we propose a scheme for transferring quantum states and preparing quantum networks.Compared with the previous schemes,this scheme is more efficient,since three or four-dimensional quantum states canbe transferred with a single step and information interchange of three-dimensional quantum states can be realized,whichis a significant improvement,ft is based on the resonant interaction of a three-mode cavity Geld with an atom.As aconsequence,the interaction time is shortened greatly.Furthermore,we give some discussions about the feasibility ofthe scheme.展开更多
We investigate the entanglement dynamics of two initially entangled atoms each interacting with a thermal field.We show that the two entangled atoms become completely disentangled in a finite time and that the lost in...We investigate the entanglement dynamics of two initially entangled atoms each interacting with a thermal field.We show that the two entangled atoms become completely disentangled in a finite time and that the lost information cannot return to the atomic system when the mean photon number of the thermal field exceeds a critical value (3.3584),even though the whole system is lossless.Then we study how the detuning between the atomic transition frequency and the field frequency and the disparity between two coupling rates would affect the evolution of the entanglement of the atomic system.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.10974028 Fujian Provincial Natural Science Foundation under Grant No.2009J06002
文摘The entanglement characteristics including the so-called sudden death effect between two identical two-levelatoms trapped in two separate cavities connected by an optical fiber are studied.The results show that the timeevolution of entanglement is sensitive not only to the degree of entanglement of the initial state but also to the ratiobetween cavity-fiber coupling (v) and atom-cavity coupling (g).This means that the entanglement dynamics can becontrolled by choosing specific v and g.
基金Supported by the National Natural Science Foundation of China under Grant No.10974028Fujian Provincial Natural Science Foundation of China under Grant No.2009J06002
文摘fn this paper we propose a scheme for transferring quantum states and preparing quantum networks.Compared with the previous schemes,this scheme is more efficient,since three or four-dimensional quantum states canbe transferred with a single step and information interchange of three-dimensional quantum states can be realized,whichis a significant improvement,ft is based on the resonant interaction of a three-mode cavity Geld with an atom.As aconsequence,the interaction time is shortened greatly.Furthermore,we give some discussions about the feasibility ofthe scheme.
基金Project supported by the National Natural Science Foundation of China (Grant No.10974028)the Natural Science Foundation of Fujian Province of China (Grant No.2009J06002)the Funds from the State Key Laboratory Breeding Base of Photocatalysis
文摘We investigate the entanglement dynamics of two initially entangled atoms each interacting with a thermal field.We show that the two entangled atoms become completely disentangled in a finite time and that the lost information cannot return to the atomic system when the mean photon number of the thermal field exceeds a critical value (3.3584),even though the whole system is lossless.Then we study how the detuning between the atomic transition frequency and the field frequency and the disparity between two coupling rates would affect the evolution of the entanglement of the atomic system.
