15 citations · 21 across the 3 of their papers we have counts for
3 papers
quant-ph2012
A sufficient condition of violating the SPA conjecture
Bang-Hai Wang, Dong-Yang Long
Based on the general form of entanglement witnesses constructed from separable states, we first show a sufficient condition of violating the structural physical approximation (SPA)…
quant-ph2011★ 6 cited
Constructing all entanglement witnesses from density matrices
Bang-Hai Wang, Dong-Yang Long
We demonstrate a general procedure to construct entanglement witnesses for any entangled state. This procedure is based on the trace inequality and a general form of entanglement w…
quant-ph2011★ 15 cited
Structural physical approximations and entanglement witnesses
Bang-Hai Wang, Dong-Yang Long
The structural physical approximation (SPA) to a positive map is considered to be one of the most important method to detect entanglement in the real physical world. We first show…