Developments of the micro-Gal level gravimeter based on atom interferometry are reviewed, and the recent progress and results of our group are also presented. Atom interferometric gravimeters have shown high resolutio...Developments of the micro-Gal level gravimeter based on atom interferometry are reviewed, and the recent progress and results of our group are also presented. Atom interferometric gravimeters have shown high resolution and accuracy for gravity measurements. This kind of quantum sensor has excited world-wide interest for both practical applications and fundamental research.展开更多
High precision atom interferometers have shown attractive prospects in laboratory for testing fundamental physics and inertial sensing.Efforts on applying this innovative technology to field applications are also bein...High precision atom interferometers have shown attractive prospects in laboratory for testing fundamental physics and inertial sensing.Efforts on applying this innovative technology to field applications are also being made intensively.As the manipulation of cold atoms and related matching technologies mature,inertial sensors based on atom interferometry can be adapted to various indoor or mobile platforms.A series of experiments have been conducted and high performance has been achieved.In this paper,we will introduce the principles,the key technologies,and the applications of atom interferometers,and mainly review the recent progress of movable atom gravimeters.展开更多
We perform a precision atom interferometry experiment to test the universality of free fall.Our experiment employs the Bragg atom interferometer with 87Rb atoms either in hyperfine state|F=1,mF=0>or|F=2,mF=0>,an...We perform a precision atom interferometry experiment to test the universality of free fall.Our experiment employs the Bragg atom interferometer with 87Rb atoms either in hyperfine state|F=1,mF=0>or|F=2,mF=0>,and the wave packets in these two states are diffracted by one pair of Bragg beams alternatively,which is helpful for suppressing common-mode systematic errors.We obtain an Eotvos ratioη1-2=(0.9±2.7)×10^-10,and set a new record on the precision with improvement of nearly 5 times.This measurement also provides constraint on the difference of the diagonal terms of the mass-energy operator.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.41127002,11204094,11205064,and 11474115)the National High Technology Research and Development Program of China(Grant No.2011AA060503)
文摘Developments of the micro-Gal level gravimeter based on atom interferometry are reviewed, and the recent progress and results of our group are also presented. Atom interferometric gravimeters have shown high resolution and accuracy for gravity measurements. This kind of quantum sensor has excited world-wide interest for both practical applications and fundamental research.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11625417,91636219,11727809,91736311,and 11922404).
文摘High precision atom interferometers have shown attractive prospects in laboratory for testing fundamental physics and inertial sensing.Efforts on applying this innovative technology to field applications are also being made intensively.As the manipulation of cold atoms and related matching technologies mature,inertial sensors based on atom interferometry can be adapted to various indoor or mobile platforms.A series of experiments have been conducted and high performance has been achieved.In this paper,we will introduce the principles,the key technologies,and the applications of atom interferometers,and mainly review the recent progress of movable atom gravimeters.
基金Supported by the National Natural Science Foundation of China(Grant Nos.11625417,91636219,11727809,91736311,and 11922404).
文摘We perform a precision atom interferometry experiment to test the universality of free fall.Our experiment employs the Bragg atom interferometer with 87Rb atoms either in hyperfine state|F=1,mF=0>or|F=2,mF=0>,and the wave packets in these two states are diffracted by one pair of Bragg beams alternatively,which is helpful for suppressing common-mode systematic errors.We obtain an Eotvos ratioη1-2=(0.9±2.7)×10^-10,and set a new record on the precision with improvement of nearly 5 times.This measurement also provides constraint on the difference of the diagonal terms of the mass-energy operator.
