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arXiv · 1512.02772

Entanglement between Lowly and Highly Lying Atomic Spin Waves

D. S. Ding·K. Wang·W. Zhang·S. Shi·M. X. Dong·Y. C. Yu·Z. Y. Zhou·B. S. Shi·G. C. Guo
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Abstract

Establishing a quantum interface between different physical systems is of special importance for developing the practical versatile quantum networks. Entanglement between low- and high-lying atomic spin waves is essential for building up Rydberg-based quantum information engineering, otherwhile be more helpful to study the dynamics behavior of entanglement under external pertur- bations. Here, we report on the successful storage of a single photon as a high-lying atomic spin wave in quantum regime. Via storing a K-vector entanglement between single photon and lowly lying spin wave, we thereby experimentally realize the entanglement between low- and high-lying atomic spin waves in two separated atomic systems. This makes our experiment the primary demonstration of Rydberg quantum memory of entanglement, making a primary step toward the construction of a hybrid quantum interface.

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D. S. Ding, K. Wang, W. Zhang, S. Shi, M. X. Dong, Y. C. Yu, Z. Y. Zhou, B. S. Shi, G. C. Guo. 2015-12-09. Entanglement between Lowly and Highly Lying Atomic Spin Waves. https://doi.org/10.1103/physreva.94.052326

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