Polarization entangled photons from quantum dots embedded in nanowires
  We present a first measurement of photon polarization entanglement from the biexciton to ground state cascade of a single InAsP quantum dot embedded in an InP nanowire. We observe a fidelity of 0.76(2) to a reference maximally entangled state as well as a concurrence of 0.57(6). 
Tobias Huber, Ana Predojevi\'c, Milad Khoshnegar, Dan Dalacu, Philip   J. Poole, Hamed Majedi, and Gregor Weihs
quant-ph cond-mat.mes-hall