Coherent control of BEC tunneling and generation of macroscopic entangled states

BEC 隧道效应的相干控制和宏观纠缠态的产生

• 批准号: 5454635
• 负责人: Privatdozent Dr. Christoph Weiß
• 金额: --
• 依托单位: Institut für Physik (IFP)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5454635?language=en
• 关键词: Coherent; control; BEC; tunneling; generation

This project aims, from a theoretical viewpoint, at the controlled manipulation of Bose-Einstein condensates in double well potentials, and the preparation of entangled many-body states, such as high-fidelity Schrödinger cat states. These states are of principal interest for fundamental physics, for exploring the boundary between classical and quantum physics and for shedding light on the measurement process. They are also important for practical applications, such as interferometry, frequency standards, and possibly quantum information processing. In a first step, the concept of coherent destruction of tunneling, previously discussed for single particles, will be applied to Bose-Einstein condensates. While this effect requires a periodic, monochromatic modulation of the trapping potential, we will consider more general variations of the system parameters in a second step, in order to reach specific target states. In a third step, we will include decoherence mechanisms, such as atom loss, and optimize our schemes.

该项目的目标是，从理论的角度来看，在双阱势中的玻色-爱因斯坦凝聚体的受控操纵，以及纠缠多体态的制备，如高保真薛定谔猫态。这些状态是基础物理学的主要兴趣，用于探索经典和量子物理学之间的边界，并揭示测量过程。它们对于实际应用也很重要，例如干涉测量、频率标准，以及可能的量子信息处理。在第一步中，先前讨论的单个粒子的隧穿相干破坏的概念将被应用于玻色-爱因斯坦凝聚。虽然这种效应需要一个周期性的，单色调制的捕获势，我们将考虑更一般的系统参数的变化，在第二步中，为了达到特定的目标状态。在第三步中，我们将包括退相干机制，如原子损失，并优化我们的方案。