We propose a scheme for teleportation of an unknown N-atom state using a two-atom entangled state within a cavity QED and show the feasibility in experiment. Our scheme does not involve the Bell-state measurement and ...We propose a scheme for teleportation of an unknown N-atom state using a two-atom entangled state within a cavity QED and show the feasibility in experiment. Our scheme does not involve the Bell-state measurement and is insensitive to the cavity decay, which is important from the experimental point of view. Another feature of the scheme is that teleporting a N-atom state just requires a small amount of entanglement （i,e. a two-atom entangled state） and less classical bits （two bits）.展开更多
We experimentally investigate the optical cavity tor various coupled regimes wltn an mjectea squeezeo vacuum state. We measure the quantum fluctuation spectra of the reflected field of an optical cavity using the homo...We experimentally investigate the optical cavity tor various coupled regimes wltn an mjectea squeezeo vacuum state. We measure the quantum fluctuation spectra of the reflected field of an optical cavity using the homodyne detection and present the spectral dependence on the absorption and dispersion properties of the cavity in the under-coupled, critically-coupled, and over-coupled regimes. The spectra lineshape is phase sensitive with the phase shift induced by the cavity. Moreover, we find that the over-coupled optical cavity has obvious advantage in the manipulation of quantum fluctuation.展开更多
基金Project supported by the National Natural Science Foundation of China （Grant No 10374025） and the Scientific Research Fund of Hunan Provincial Education Department （Grant No 01c260）.
文摘We propose a scheme for teleportation of an unknown N-atom state using a two-atom entangled state within a cavity QED and show the feasibility in experiment. Our scheme does not involve the Bell-state measurement and is insensitive to the cavity decay, which is important from the experimental point of view. Another feature of the scheme is that teleporting a N-atom state just requires a small amount of entanglement （i,e. a two-atom entangled state） and less classical bits （two bits）.
基金supported in part by the National "973"Program of China (No. 2011CB921601)NSFC Project for Excellent Research Team (No. 61121064)the Doctoral Program Foundation of Ministry of Education China (No. 20111401130001)
文摘We experimentally investigate the optical cavity tor various coupled regimes wltn an mjectea squeezeo vacuum state. We measure the quantum fluctuation spectra of the reflected field of an optical cavity using the homodyne detection and present the spectral dependence on the absorption and dispersion properties of the cavity in the under-coupled, critically-coupled, and over-coupled regimes. The spectra lineshape is phase sensitive with the phase shift induced by the cavity. Moreover, we find that the over-coupled optical cavity has obvious advantage in the manipulation of quantum fluctuation.
