期望值量子计算机的缩短Grover搜索算法
Shortening Grover's search algorithm for an expectation value quantum computer
摘要：
量子算法通常被公式化用于在服从投影测量的单个量子位系统上实现。然而，在期望值量子计算中，例如核磁共振实现，计算机由仅服从期望值测量的相同量子位系统的集合组成。在量子算法的这种期望值实现中，普遍的策略是保留传统公式的酉运算，但适当地修改其初始化和测量步骤。这种天真的方法是不是最佳的Grover算法和缩短版本的期望值量子计算机。
英文摘要：
Quantum algorithms are conventionally formulated for implementation on a single system of qubits amenable to projective measurements. However, in expectation value quantum computation, such as nuclear magnetic resonance realizations, the computer consists of an ensemble of identical qubit-systems amenable only to expectation value measurements. The prevalent strategy in such expectation value implementations of quantum algorithms has been to retain the conventional formulation's unitary operations but modify its initialization and measurement steps appropriately. This naive approach is not optimal for Grover's algorithm and a shortened version for expectation value quantum computers is presented.
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