Progress towards a test of the universality of free fall using a $^6$ Li/ $^7$ Li atom interferometerProgress towards a test of the universality of free fall using a $^6$Li/$^7$Li atom interferometer

Paul Hamilton, Tom Barter, Geena Kim +2 more

Bulletin of the American Physical SocietyJun 14, 20112 citations

Testing the Equivalence Principle with a two-species atom interferometer in free fall

Patrick Cheinet

Jun 1, 20100 citations

Testing the universality of free fall with atoms in different quantum states

Zhong-Kun Hu, Xiao-Chun Duan, Min-Kang Zhou +1 more

Bulletin of the American Physical SocietyJun 7, 20170 citations

Atom interferometry in free fall

Arnaud Landragin

May 22, 20130 citations

Testing the Universality of Free Fall at ${10^{ - 10}}$ level by Comparing the Atoms in Different Hyperfine States with Bragg DiffractionTesting the Universality of Free Fall at ${10^{ - 10}}$ level by Comparing the Atoms in Different Hyperfine States with Bragg Diffraction

Ke Zhang, Min-Kang Zhou, Yuan Sheng Cheng +6 more

We have performed a precision atomic interferometry experiment on testing the universality of free fall (UFF) considering atoms' spin degree of freedom. Our experiment employs the Bragg atom interferometer with $^{87}$ Rb atoms either in hyperfine state $\left| {F = 1,{m_F} = 0} \right\rangle $ or $\left| {F = 2,{m_F} = 0} \right\rangle $, and the wave packets in these two states are diffracted in one pair of Bragg beams alternatively, which can help suppress the common-mode systematic errors. We have obtained an E$ \rm{\ddot{o}} $tv$ \rm{\ddot{o}}$s ratio $η= \left( { 0.9 \pm 2.7} \right) \times {10^{ - 10}}$ , and set a new record on the precision with a nearly 5 times improvement. Our experiment gives stronger restrictions on the possible UFF breaking mechanism.We have performed a precision atomic interferometry experiment on testing the universality of free fall (UFF) considering atoms' spin degree of freedom. Our experiment employs the Bragg atom interferometer with $^{87}$Rb atoms either in hyperfine state $\left| {F = 1,{m_F} = 0} \right\rangle $ or $\left| {F = 2,{m_F} = 0} \right\rangle $, and the wave packets in these two states are diffracted in one pair of Bragg beams alternatively, which can help suppress the common-mode systematic errors. We have obtained an E$\rm{\ddot{o}}$tv$\rm{\ddot{o}}$s ratio $η= \left( { 0.9 \pm 2.7} \right) \times {10^{ - 10}}$, and set a new record on the precision with a nearly 5 times improvement. Our experiment gives stronger restrictions on the possible UFF breaking mechanism.

arXiv:1805.07758May 20, 20185 citations

Testing the Universality of Free Fall by Comparing the Atoms in Different Hyperfine States with Bragg Diffraction*

Ke Zhang, Min-Kang Zhou, Yuan Sheng Cheng +6 more

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 , m F = 0 or F = 2 , m F = 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 Eötvös ratio η 1 − 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.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 , m F = 0 or F = 2 , m F = 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 Eötvös ratio η 1 − 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.

Chinese Physics LettersApr 1, 202030 citations

Progress towards a test of the universality of free fall using a

^6

Li/

^7

Li atom interferometer

Testing the Universality of Free Fall at

{10^{ - 10}}

level by Comparing the Atoms in Different Hyperfine States with Bragg Diffraction

^{87}

Rb atoms either in hyperfine state $\left| {F = 1,{m_F} = 0} \right\rangle $ or $\left| {F = 2,{m_F} = 0} \right\rangle

, and the wave packets in these two states are diffracted in one pair of Bragg beams alternatively, which can help suppress the common-mode systematic errors. We have obtained an E

\rm{\ddot{o}}

tv

\rm{\ddot{o}}$s ratio

η= \left( { 0.9 \pm 2.7} \right) \times {10^{ - 10}}

, and set a new record on the precision with a nearly 5 times improvement. Our experiment gives stronger restrictions on the possible UFF breaking mechanism.