Entanglement generation between two spinor Bose-Einstein condensates with cavity QED
Daniel Rosseau, Qianqian Ha, Tim Byrnes · Physical Review A · 2014
We analyze a scheme for generating entanglement between two spinor Bose-Einstein condensates (BECs). The BECs are off-resonantly coupled to a common photon mode and are controlled by external lasers to induce a ${S}^{z}{S}^{z}$ interaction, where ${S}^{z}$ is the total spin of the BEC. We directly simulate the scheme numerically for small systems and show the performance of the scheme. The scaling of the entanglement to large-scale systems under realistic conditions of spontaneous emission and cavity photon loss is analyzed. It is shown that both entanglement in the beyond-continuous-variable regime can be generated, where the entanglement is of the order of the maximal entanglement between the systems.