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# Synthetic electric fields

The researchers create a synthetic electric field (E*) in an ultracold gas of several hundred thousand rubidium atoms (BEC) immersed in a constant magnetic field (B0). Using lasers (red arrows), the team alters the atoms energy-momentum relationship, which causes the atoms to move in a way that is physically identical and mathematically equivalent to how a charged particle would move in an electric field.

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April 1, 2011

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