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| 1 | An N/4 fixed-point duality quantum search algorithm显示文摘Here a fixed-point duality quantum search algorithm is proposed.This algorithm uses iteratively non-unitary operations and measurements to search an unsorted database.Once the marked item is found,the algorithm stops automatically.This algorithm uses a constant non-unitary operator,and requires N/4 steps on average(N is the number of data from the database) to locate the marked state.The implementation of this algorithm in a usual quantum computer is also demonstrated. | HAO Liang1,LIU Dan2 & LONG GuiLu1,3 1Key Laboratory for Atomic and Molecular NanoSciences and Department of Physics,Tsinghua University,Beijing 100084,China 2School of Sciences,Dalian Nationalities University,Dalian 116600,China 3Tsinghua National Laboratory for Information Science and Technology,Beijing 100084,China | 2010 | Science China(Physics,Mechanics & Astronomy)2010，53，9： | 8 |
| 2 | Implementing two optimal economical quantum cloning with superconducting quantum interference devices in a cavity显示文摘We propose a unified scheme to implement the optimal 1→ 3economical phase-covariant quantum cloning and optimal 1→3 economical real state cloning with superconducting quantum interference devices (SQUIDs) in a cavity.During this process,no transfer of quantum information between the SQUIDs and cavity is required.The cavity field is only virtually excited.The scheme is insensitive to cavity decay.Therefore,the scheme can be experimentally realized in the range of current cavity QED techniques. | YE Liu HU GuiYu LI AiXia | 2011 | Science China(Physics,Mechanics & Astronomy)2011，54，1： | 3 |
| 3 | On the developments and applications of optical microcavities: an overview显示文摘Devices based on the optical microcavities which confne light to small volumes by resonant recirculation are already indispensable for a wide range of studies and applications.This article provides an overview of the development and application of optical microcavities.We frst give a pedagogical introduction to the interaction between a two-level system and a quantized electromagnetic feld in the cavity,based on the so-called Jaynes-Cummings model,which is basic and important theory model in the cavity quantum electrodynamics,and various quantum phenomena and applications of it.Then,we overview three basic types of the microcavity structures,and also highlight the progress achieved so far in these systems.Based on these three structures,we give an account of three representative applications of optical microcavities,and explain their microcavity requirements and the state of the art for these devices,before outlining the challenges for the future. | WANG TieJun CAO Cong WANG Chuan | 2013 | Science China(Information Sciences)2013，56，12： | 0 |
| 4 | 最优1→3对称型经济实态量子克隆的固态电路实现方案显示文摘提出一种最优1→3对称型经济实态量子克隆的固态电路实现方案.在方案中,通过利用磁脉冲控制磁通量、电荷和穿过约瑟夫森结的相位差来实现最优1→3对称型经济实态量子克隆.经济实态量子克隆只需要对比特进行操作,不需要其它辅助操作,实验上简化了量子克隆的实现过程.由于超导比特具有耦合强度强,又没有非线性电感和能量的耗散等优点.相比于腔QED系统,固态系统在实验上便于集成和操作. | 赵英燕 王辉 陈娟 姜年权 | 2013 | 温州大学学报(自然科学版)2013，34，4： | 0 |
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