基于低品质腔,我们提出了一个光子系统的多体纠缠纯化方案(multipartite entanglement purification protocol,简称MEPP)。在这个方案中,通过执行比特反转纠错和相位反转纠错这两个步骤,多光子缠态就能够被纯化。而且可以重复这两步,来得到一个高保真度的纠缠光子态。通过光子在低品质腔中的输入输出过程,光子极化态的宇称能被非破坏性的探测。不同于其他的MEPP,这个方案在目前的实验条件下是非破坏性的而且是可行的。
We propose a multipartite entanglement purification protocol(MEPP) for photonic entangled states using low-Q cavities.In our MEPP,the multipartite photonic entangled states can be purified with the two steps,i.e.,bit-flip error correction and phase-flip error correction.We can repeat these two steps to get a hight-fidelity entangled photonic states.By the single photon input-output process regarding the low-Q cavity containing an atom,the parity of photonic polarization state can be nondestructive detect.Different from other photonic MEPPs,Our MEPP are nondestructive and feasible in current experiment conditions.