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arXiv · 1307.5291

Spin squeezing and EPR entanglement of two bimodal condensates in state-dependent potentials

Hadrien Kurkjian·Krzysztof Pawlowski·Philipp Treutlein·Alice Sinatra
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Abstract

We propose and analyze a scheme to entangle the collective spin states of two spatially separated bimodal Bose-Einstein condensates. Using a four-mode approximation for the atomic field, we show that elastic collisions in a state-dependent potential simultaneously create spin-squeezing in each condensate and entangle the collective spins of the two condensates. We investigate mostly analytically the non-local quantum correlations that arise in this system at short times and show that Einstein-Podolsky-Rosen (EPR) entanglement is generated between the condensates. At long times we point out macroscopic entangled states and explain their structure. The scheme can be implemented with condensates in state-dependent microwave potentials on an atom chip.

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Hadrien Kurkjian, Krzysztof Pawlowski, Philipp Treutlein, Alice Sinatra. 2013-11-22. Spin squeezing and EPR entanglement of two bimodal condensates in state-dependent potentials. https://doi.org/10.1103/physreva.88.043605

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