Preparation of pseudo-pure states by line-selective pulses in nuclear magnetic resonance

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• 作者：Peng ; Xinhua ; Zhu ; Xiwen ; Fang ; Ximing ; Feng ; Mang ; Gao ; Kelin ; Yang ; Xiaodong ; Liu ; Maili
• 刊名：Chemical Physics Letters
• 出版年：2001
• 出版时间：June 8, 2001
• 年：2001
• 卷：340
• 期：5-6
• 页码：509-516
• 全文大小：99.7 K

文摘

An alternative method of preparing the pseudo-pure state of a spin system for quantum computation in liquid-state nuclear magnetic resonance (NMR) is demonstrated experimentally. Applying specific line-selective pulses with appropriately chosen flipping angles simultaneously and then a field gradient pulse we acquire straightforwardly all pseudo-pure states for two qubits in a single experiment quite efficiently. The signal intensity from the pseudo-pure state prepared in this way is the same as that of temporal averaging. As an example of an application, a highly structured search algorithm – Hogg's algorithm – is also performed on the pseudo-pure state |00 prepared by the method.