In this paper the conventional electronic spin echo technique is proposed to detect the macroscopic quantum coherence of a Bose-Einstein condensate. In this technique, a $pi@/2 microwave pulse followed by a $pi pulse with an appropriate delay is used to excite the Zeeman levels of a Bose condensed gas. After the two pulses, a spin echo pulse is generated due to the dephasing and rephasing processes in the gas. We show that the properties of the spin echo signal depends on the temperature of the gas. If a condensate exists in the gas, the echo signal can reflect the macroscopic quantum coherence of the Bose-Einstein condensate. The detection technique doesn't destroy the sample.
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机译：在本文中，提出了传统的电子旋转回波技术以检测Bose-Einstein冷凝物的宏观量子相干性。在这种技术中，$ PI @ / 2微波脉冲随后是一个$ PI脉冲，使用适当的延迟来激发母猪凝聚气体的塞曼水平。在两个脉冲之后，由于气体中的除去和重新分析过程而产生自旋回波脉冲。我们表明旋转回波信号的特性取决于气体的温度。如果气体中存在冷凝物，则回波信号可以反映Bose-Einstein冷凝物的宏观量子相干性。检测技术不会破坏样本。
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