以混合态为初态实现Deutsch-Josza量子算法

USING MIXED INITIAL STATE TO REALIZE DEUTSCH-JOZSA ALGORITHM

给出了一种以混合态为初态实现Deutsch-Josza(D-J)量子算法的方法。根据这种方法,需要引入一个辅助量子比特,而且不必制备纯态就可以实现D-J算法,并且读出结果时只需对辅助量子比特进行测量,这样其结果的读出过程比一般的D-J量子算法的读出过程简单,因此这种方法更容易在实验上实现。

This paper presents a scheme for realizing Deutsch -Josza quantum algorithm by using one mixed state as initial state whose preparation process is easier than that of the pure state. In terms of this scheme, we have to add one qubit as ancillary qubit, but needn＇t prepare a pure state. Moreover, the process of result out - reading can be completed by only measuring the ancillary qubit. Due to its simple preparation process of initial state and convenient result out -reading process, this scheme is very easy to be experimentally implemented.