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arXiv quant-ph/0205160quant-ph
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几何相位到完全正映射的推广

Generalization of geometric phase to completely positive maps

Marie Ericsson, Erik Sjöqvist, Johan Brännlund, Daniel K. L. Oi, Arun K. Pati

摘要:

我们推广的概念,相对相位的完全正的地图与已知的酉表示,基于干涉。平行运输条件,定义的几何相位,这样的地图。干扰效应体现在通过翻转两条路径之一中的环境状态而定义的一组干扰模式中。我们表明,这种结构引起有趣的额外信息的CP地图定义的演化的几何形状的量子位。

英文摘要:

We generalize the notion of relative phase to completely positive maps with known unitary representation, based on interferometry. Parallel transport conditions that define the geometric phase for such maps are introduced. The interference effect is embodied in a set of interference patterns defined by flipping the environment state in one of the two paths. We show for the qubit that this structure gives rise to interesting additional information about the geometry of the evolution defined by the CP map.

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