Test of the Universality of Free Fall with Atoms in Different Spin Orientations.

@article{Duan2015TestOT,
  title={Test of the Universality of Free Fall with Atoms in Different Spin Orientations.},
  author={Xiao-chun Duan and Xiao-Bing Deng and Min-Kang Zhou and Ke Zhang and Wenlan Xu and Feng Xiong and Yao-Yao Xu and Cheng-Gang Shao and Jun Luo and Zhongkun Hu},
  journal={Physical review letters},
  year={2015},
  volume={117 2},
  pages={
          023001
        }
}
We report a test of the universality of free fall by comparing the gravity acceleration of the ^{87}Rb atoms in m_{F}=+1 versus those in m_{F}=-1, of which the corresponding spin orientations are opposite. A Mach-Zehnder-type atom interferometer is exploited to alternately measure the free fall acceleration of the atoms in these two magnetic sublevels, and the resultant Eötvös ratio is η_{S}=(0.2±1.2)×10^{-7}. This also gives an upper limit of 5.4×10^{-6}  m^{-2} for a possible gradient field… 

Figures and Tables from this paper

Quantum test of the equivalence principle for atoms in coherent superposition of internal energy states

A novel WEP test for atoms is reported: a Bragg atom interferometer in a gravity gradiometer configuration compares the free fall of rubidium atoms prepared in two hyperfine states and in their coherent superposition, using the use of the superposition state.

United test of the equivalence principle at $10^{-10}$ level using mass and internal energy specified atoms

We use both mass and internal energy specified rubidium atoms to jointly test the weak equivalence principle (WEP). We improve the four-wave double-diffraction Raman transition method (FWDR) we

Bragg gravity-gradiometer using the 1S0–3P1 intercombination transition of 88Sr

We present a gradiometer based on matter-wave interference of alkaline-earth-metal atoms, namely 88Sr. The coherent manipulation of the atomic external degrees of freedom is obtained by

Test of the Equivalence Principle with Chiral Masses Using a Rotating Torsion Pendulum.

This is the first reported experimental test of the equivalence principle for chiral masses and opens a new way to the search for the possible parity-violating gravitation.

Establishing the quasi-inertial reference system based on free-falling atom and its application on gravity experiments

We construct a quasi-inertial reference system for the atom interferometer in terms of the light-field compensation, which is equivalent to the establishment of a quantum drag-free system. The

Measurement of a Li7 tune-out wavelength by phase-patterned atom interferometry

Atom interferometers typically use the total populations the interferometer's output ports as the signal, but finer spatial structure can contain useful information. We pattern a matter-wave phase

Sr atom interferometry with the optical clock transition as a gravimeter and a gravity gradiometer

We characterize the performance of a gravimeter and a gravity gradiometer based on the 1S0–3P0 clock transition of strontium atoms. We use this new quantum sensor to measure the gravitational

Lorentz-violating scalar Hamiltonian and the equivalence principle in a static metric

In this paper, we obtain a nonrelativistic Hamiltonian from the Lorentz-violating (LV) scalar Lagrangian in the minimal SME. The Hamiltonian is obtained by two different methods. One is through the

A Mass-Energy United Test of the Equivalence Principle

The equivalence principle (EP) is one of the basic assumptions of general relativity. Almost all new theories[1] that attempt to unify gravity with the standard model[2] require the EP be broken.

Spinning particles coupled to gravity and the validity of the universality of free fall

Recent experimental work has determined that free falling 87Rb atoms on Earth, with vertically aligned spins, follow geodesics, thus apparently ruling out spin-gravitation interactions. It is showed
...

References

SHOWING 1-10 OF 139 REFERENCES

STE-QUEST—test of the universality of free fall using cold atom interferometry

The theory of general relativity describes macroscopic phenomena driven by the influence of gravity while quantum mechanics brilliantly accounts for microscopic effects. Despite their tremendous

Test of Einstein equivalence principle for 0-spin and half-integer-spin atoms: search for spin-gravity coupling effects.

This is the first reported experimental test of the equivalence principle for bosonic and fermionic particles and opens a new way to the search for the predicted spin-gravity coupling effects.

Measurement of gravitational acceleration by dropping atoms

Laser-cooling of atoms and atom-trapping are finding increasing application in many areas of science. One important use of laser-cooled atoms is in atom interferometers. In these devices, an atom is

General Relativity with Spin and Torsion: Foundations and Prospects

A generalization of Einstein's gravitational theory is discussed in which the spin of matter as well as its mass plays a dynamical role. The spin of matter couples to a non-Riemannian structure in

ROTATABLE-TORSION-BALANCE EQUIVALENCE PRINCIPLE EXPERIMENT FOR THE SPIN-POLARIZED HoFe3

We use a rotatable torsion balance to perform an equivalence principle test on a magnetically shielded spin-polarized body of HoFe3. With a rotation period of one hour, the period of possible signal

Testing the universality of free fall with rubidium and ytterbium in a very large baseline atom interferometer

We propose a very long baseline atom interferometer test of Einstein’s equivalence principle (EEP) with ytterbium and rubidium extending over 10 m of free fall. In view of existing parametrizations

Ultra-sensitive magnetometry based on free precession of nuclear spins

AbstractWe discuss the design and performance of a very sensitive low-field magnetometer based on the detection of free spin precession of gaseous, nuclear polarized 3He or 129Xe samples with a SQUID

Precisely mapping the magnetic field gradient in vacuum with an atom interferometer

The magnetic field gradient has been measured with an atom interferometer using the magnetic sublevels of {sup 87}Rb atoms. The Doppler-insensitive measurement effectively eliminates the contribution

Rotation, the equivalence principle, and the Gravity Probe B experiment.

  • W. Ni
  • Physics
    Physical review letters
  • 2011
The ultraprecise Gravity Probe B experiment measured the frame-dragging effect and geodetic precession on four quartz gyros. We use this result to test WEP II (weak equivalence principle II) which

Atomic interferometer with amplitude gratings of light and its applications to atom based tests of the equivalence principle.

A matter wave interferometer based on the diffraction of atoms from effective absorption gratings of light is developed and used in a setup with cold rubidium atoms in an atomic fountain to carry out tests of the equivalence principle on an atomic basis.
...