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Measurements of gravitational acceleration from an echo atom interferometer

Carson Mok, Adam C. Carew, B. Barrett +2 more

Bulletin of the American Physical SocietyJun 8, 20120 citations

Techniques for sensitive measurements of gravitational acceleration using single state echo atom interferometers

Gehrig Carlse, Jaskaran Randhawa, Alexander Pouliot +3 more

Optical and Quantum Sensing and Precision Metrology IIMar 19, 20251 citation

Atom-Based Test of the Equivalence Principle

Sebastian Fray, Martin Weitz

We describe a test of the equivalence principle with quantum probe particles based on atom interferometry. For the measurement, a light pulse atom interferometer based on the diffraction of atoms from effective absorption gratings of light has been developed. A differential measurement of the Earth’s gravitational acceleration g for the two rubidium isotopes 85 Rb and 87 Rb has been performed, yielding a difference Δ g / g =(1.2±1.7)×10 −7 . In addition, the dependence of the free fall on the relative orientation of the electron to the nuclear spin was studied by using atoms in two different hyperfine states. The determined difference in the gravitational acceleration is Δ g / g =(0.4±1.2)×10 −7 . Within their experimental accuracy, both measurements are consistent with a free atomic fall that is independent from internal composition and spin orientation.We describe a test of the equivalence principle with quantum probe particles based on atom interferometry. For the measurement, a light pulse atom interferometer based on the diffraction of atoms from effective absorption gratings of light has been developed. A differential measurement of the Earth’s gravitational acceleration g for the two rubidium isotopes 85 Rb and 87 Rb has been performed, yielding a difference Δ g / g =(1.2±1.7)×10 −7 . In addition, the dependence of the free fall on the relative orientation of the electron to the nuclear spin was studied by using atoms in two different hyperfine states. The determined difference in the gravitational acceleration is Δ g / g =(0.4±1.2)×10 −7 . Within their experimental accuracy, both measurements are consistent with a free atomic fall that is independent from internal composition and spin orientation.

Space Science ReviewsJul 24, 200911 citations

Measurement of gravitational acceleration by dropping atoms

Achim Peters, Keng Yeow Chung, Steven Chu

NatureAug 1, 1999927 citations

Gravity field measurements using cold atoms with direct optical readout

Andrey B. Matsko, Nan Yu, Lute Maleki

We show theoretically that measuring an optimum observable of an electromagnetic wave propagating in an atomic medium moving freely in a gravitational field results in a sensitive detection of the acceleration of gravity and its gradient. The best achievable sensitivity of such a measurement is comparable with that of light-pulse atom interferometers based on measuring the atomic internal state. This optical technique is useful for nondestructive detection of ultracold atoms in atomic interferometers.We show theoretically that measuring an optimum observable of an electromagnetic wave propagating in an atomic medium moving freely in a gravitational field results in a sensitive detection of the acceleration of gravity and its gradient. The best achievable sensitivity of such a measurement is comparable with that of light-pulse atom interferometers based on measuring the atomic internal state. This optical technique is useful for nondestructive detection of ultracold atoms in atomic interferometers.

Physical Review AApr 28, 20038 citations

Experimental progress in gravity measurement with an atom interferometer

Min-Kang Zhou, Zhong-Kun Hu, Xiao‐Chun Duan +3 more

物理学前沿：英文版May 4, 200915 citations

Measurement of the gravitational acceleration of an atom with a light-pulse atom interferometer

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