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quant-ph2005★ 199 cited
Feedback cooling of a single trapped ion
Pavel Bushev, Daniel Rotter, Alex Wilson +7
Based on a real-time measurement of the motion of a single ion in a Paul trap, we demonstrate its electro-mechanical cooling below the Doppler limit by homodyne feedback control (c…
quant-ph2005★ 121 cited
Robust entanglement
H. Haeffner, F. Schmidt-Kaler, W. Haensel +8
It is common belief among physicists that entangled states of quantum systems loose their coherence rather quickly. The reason is that any interaction with the environment which di…