双粒子量子干涉在隧道耦合光镊中。

Two-particle quantum interference in tunnel-coupled optical tweezers.

机构信息

JILA, National Institute of Standards and Technology and University of Colorado, Boulder, CO 80309, USA. Department of Physics, University of Colorado, Boulder, CO 80309, USA.

Joint Quantum Institute and the National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.

出版信息

Science. 2014 Jul 18;345(6194):306-9. doi: 10.1126/science.1250057. Epub 2014 Jun 26.

DOI:10.1126/science.1250057

PMID:24968938

Abstract

The quantum statistics of atoms is typically observed in the behavior of an ensemble via macroscopic observables. However, quantum statistics modifies the behavior of even two particles. Here, we demonstrate near-complete control over all the internal and external degrees of freedom of two laser-cooled (87)Rb atoms trapped in two optical tweezers. This controllability allows us to observe signatures of indistinguishability via two-particle interference. Our work establishes laser-cooled atoms in optical tweezers as a promising route to bottom-up engineering of scalable, low-entropy quantum systems.

摘要

原子的量子统计通常通过宏观可观测量来观察到集体的行为。然而，量子统计甚至会改变两个粒子的行为。在这里，我们展示了对两个被困在两个光镊中的激光冷却（87）Rb 原子的所有内部和外部自由度的近乎完全控制。这种可控性使我们能够通过双粒子干涉观察到不可分辨性的特征。我们的工作确立了在光镊中的激光冷却原子作为一种有前途的自下而上工程可扩展、低熵量子系统的途径。