We describe a Sagnac interferometer suitable for rotation sensing, implemented using an atomic Bose-Einstein condensate confined in a harmonic magnetic trap. The atom wave packets are split and recombined by standing-wave Bragg lasers, and the trapping potential steers the packets along circular trajectories with a radius of 0.2 mm. Two conjugate interferometers are implemented simultaneously to provide common-mode rejection of noise and to isolate the rotation signal. With interference visibilities of about 50%, we achieve a rotation sensitivity comparable to Earth’s rate in about 10 min of operation. Gyroscope operation was demonstrated by rotating the optical table on which the experiment was performed.

中文翻译：

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原子光学波导中双Sagnac干涉仪的量子旋转传感

我们描述了一种适用于旋转感应的Sagnac干涉仪，该干涉仪使用谐波磁阱中的原子Bose-Einstein冷凝物实现。原子波包被驻波布拉格激光分裂和复合，俘获势使包沿半径为0.2 mm的圆形轨迹转向。同时实现两个共轭干涉仪，以提供共模噪声抑制并隔离旋转信号。在大约50％的干扰可见性下，我们在大约10分钟的运行中就获得了与地球速度相当的旋转灵敏度。通过旋转进行实验的光学平台来演示陀螺仪的操作。