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arXiv 0906.0962quant-ph
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量子极限计量学与玻色-爱因斯坦凝聚体

Quantum-limited metrology and Bose-Einstein condensates

Sergio Boixo, Animesh Datta, Matthew J. Davis, Anil Shaji, Alexandre B. Tacla, Carlton M. Caves

摘要:

我们讨论了一个量子计量学协议,旨在估计一个物理参数的玻色-爱因斯坦凝聚体的N原子,我们表明,测量不确定度可以降低速度超过1/N。1/N比例通常被认为是任何测量方案中最好的。从量子信息理论的角度,我们概述了导致测量不确定度优于1/N的主要思想。我们详细研究了一些潜在的问题和挑战,出现在实施这样的测量协议使用玻色-爱因斯坦凝聚体。我们将讨论如何处理这些问题中的一些可以通过使用低维凝聚被困在非谐势。

英文摘要:

We discuss a quantum-metrology protocol designed to estimate a physical parameter in a Bose-Einstein condensate of N atoms, and we show that the measurement uncertainty can decrease faster than 1/N. The 1/N scaling is usually thought to be the best possible in any measurement scheme. From the perspective of quantum information theory, we outline the main idea that leads to a measurement uncertainty that scales better than 1/N. We examine in detail some potential problems and challenges that arise in implementing such a measurement protocol using a Bose-Einstein condensate. We discuss how some of these issues can be dealt with by using lower-dimensional condensates trapped in nonharmonic potentials.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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