Quantum Gates and Small Cluster States with Trapped Neutral Atoms

量子门和具有俘获中性原子的小团簇态

• 批准号: 21727045
• 负责人: Professor Dr. Dieter Meschede
• 金额: --
• 依托单位: Institut für Angewandte Physik
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/21727045?language=en
• 关键词: Quantum; Gates; Small; Cluster; States

We plan to investigate small strings of neutral atoms for applications in quantum information processing. The atoms are stored, one by one, in a standing wave dipole trap and the interaction between the atoms, necessary for the implementation of quantum gates, will be realized through controlled cold collisions. For this, we will employ the technique of spin dependent transport. This technique will allows us to manually split the wave functions of the trapped atoms in a deterministic and fully controlled single atom Stern-Gerlach experiment, where the dipole trap provides the effective magnetic field. By recombining the atomic wave function, we will then realize a single atom interferometer and directly measure the coherence properties of the splitting process. A sequence of splitting operations, carried out on a single atom, will result in a quantum analogue of the Gallon board, where the atom carries out a quantum walk. Such quantum walks have recently been proposed as an alternative approach to quantum computing. Our ultimate goal is the implementation of fundamental quantum gates using controlled cold collisions within a register of 2-10 trapped neutral atoms. A parallel application of such quantum gates should then open the route towards the preparation of small cluster states consisting of up to 10 individually addressable qubits.

我们计划研究中性原子的小串在量子信息处理中的应用。原子一个接一个地存储在驻波偶极子阱中，原子之间的相互作用是实现量子门所必需的，将通过受控的冷碰撞来实现。为此，我们将采用自旋相关输运技术。这项技术将允许我们在确定性和完全控制的单原子斯特恩-格拉赫实验中手动分裂被困原子的波函数，其中偶极子陷阱提供有效磁场。通过重组原子波函数，我们将实现单原子干涉仪，并直接测量分裂过程的相干性。在单个原子上执行的一系列分裂操作将导致量子模拟的加仑板，其中原子进行量子行走。这种量子行走最近被提议作为量子计算的一种替代方法。我们的最终目标是在2-10个被捕获的中性原子的寄存器中使用受控的冷碰撞来实现基本量子门。这种量子门的并行应用将为制备由多达10个单独可寻址量子比特组成的小簇态开辟道路。