What are the key theoretical problems? Security proof of coherent state and squeezed state CV protocols for bare CVQKD system: What's the measure of security and so what's the absolute secure case (criterion)? How to provethe absolutesecurity of squeezed state andcoher ...
What are the key theoretical problems? Security proof of BB84 and E91, etc., protocols for bare QKD system: What's the measure of security and so what's the absolute secure case (criterion)? How to provethe absolutesecurity of BB84 and E91 protocol using a general approach? ...
The following is the key for the optical buffer using QCI mechanism: bandwidth-delay-product (BDP): Hence, we need not only more delay, but alsobigger bandwidth of the QCI (EIT, CPO, or whatever) window. how about gaseous medium: too narrow bandwidth but the delay is very go ...
1) Some basics: So far, how many kninds of entanglement are there? I mean, for multipartite entangled states, we know both W state and GHZ state. I just want to know their properties. 2) How to generate photon-photon pair? How many methods are there available so far? At least for SSPDC method, w ...
The following questions are those related to quantum entanglement in my mind: 1) What's the general definition of the measure of entanglement? so, far, we have got to know several items, such as Schmidt number, von Neumann entropy (compare with Shannon entropy), and concurrence. 2)  ...
JOURNAL OF PHYSICS B: ATOMIC, MOLECULAR AND OPTICAL PHYSICS 38, S589S604 (2005). Quantum control of light using electromagnetically induced transparency