We propose a scenario to increase the probability of probabilistic quantum deletion and to enhance the fidelity of approximate quantum deletion for two non-orthogonal states via weak measurement. More interestingly, by pretreating the given non-orthogonal states, the probability of probabilistic quantum deletion and fidelity of approximate quantum deletion can reach 1. Since outcomes of the weak measurement that we required are probabilistic, we perform the subsequent deleting process only when the outcome of weak measurement is "yes". Remarkably, we find that our scenario has better performance in quantum information process; for example, it costs less quantum resources and time.

中文翻译：

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通过弱测量对两个非正交量子态的副本进行量子删除

我们提出了一种方案，通过弱测量来增加概率量子缺失的概率并提高两个非正交状态的近似量子缺失的保真度。更有趣的是，通过对给定的非正交状态进行预处理，概率量子缺失的概率和近似量子缺失的保真度可以达到1。 由于我们要求的弱测量的结果是概率性的，我们只有在结果为弱测量是“是”。值得注意的是，我们发现我们的场景在量子信息处理方面有更好的表现；例如，它花费更少的量子资源和时间。