Experimental creation of entanglement using separable state
  We experimentally demonstrate the entanglement can be created on two distant particles using separate state. We show that two data particles can share some entanglement while one ancilla particle always remains separable from them during the experimental evolution of the system. Our experiment can be viewed as a benchmark to illustrate the idea that no prior entanglement is necessary to create entanglement. 
Xiaodong Yang, An Min Wang, Xiaosan Ma, Feng Xu, Hao You, and Wanqing   Niu