Details
| Original language | English |
|---|---|
| Article number | 013139 |
| Journal | Physical Review Research |
| Volume | 6 |
| Issue number | 1 |
| Publication status | Published - 2 Feb 2024 |
Abstract
Atom interferometers allow determining inertial effects to high accuracy. Quantum-projection noise as well as systematic effects impose demands on large atomic flux as well as ultralow expansion rates. Here we report on a high-flux source of ultracold atoms with free expansion rates near the Heisenberg limit directly upon release from the trap. Our results are achieved in a time-averaged optical dipole trap and enabled through dynamic tuning of the atomic scattering length across two orders of magnitude interaction strength via magnetic Feshbach resonances. We demonstrate Bose-Einstein condensates with more than 6×104 particles after evaporative cooling for 170 ms and their subsequent release with a minimal expansion energy of 4.5 nK in one direction. Based on our results we estimate the performance of an atom interferometer and compare our source system to a high performance chip trap, as readily available for ultraprecise measurements in microgravity environments.
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In: Physical Review Research, Vol. 6, No. 1, 013139, 02.02.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - High-flux source system for matter-wave interferometry exploiting tunable interactions
AU - Herbst, A.
AU - Estrampes, T.
AU - Albers, H.
AU - Vollenkemper, V.
AU - Stolzenberg, K.
AU - Bode, S.
AU - Charron, E.
AU - Rasel, E. M.
AU - Gaaloul, N.
AU - Schlippert, D.
PY - 2024/2/2
Y1 - 2024/2/2
N2 - Atom interferometers allow determining inertial effects to high accuracy. Quantum-projection noise as well as systematic effects impose demands on large atomic flux as well as ultralow expansion rates. Here we report on a high-flux source of ultracold atoms with free expansion rates near the Heisenberg limit directly upon release from the trap. Our results are achieved in a time-averaged optical dipole trap and enabled through dynamic tuning of the atomic scattering length across two orders of magnitude interaction strength via magnetic Feshbach resonances. We demonstrate Bose-Einstein condensates with more than 6×104 particles after evaporative cooling for 170 ms and their subsequent release with a minimal expansion energy of 4.5 nK in one direction. Based on our results we estimate the performance of an atom interferometer and compare our source system to a high performance chip trap, as readily available for ultraprecise measurements in microgravity environments.
AB - Atom interferometers allow determining inertial effects to high accuracy. Quantum-projection noise as well as systematic effects impose demands on large atomic flux as well as ultralow expansion rates. Here we report on a high-flux source of ultracold atoms with free expansion rates near the Heisenberg limit directly upon release from the trap. Our results are achieved in a time-averaged optical dipole trap and enabled through dynamic tuning of the atomic scattering length across two orders of magnitude interaction strength via magnetic Feshbach resonances. We demonstrate Bose-Einstein condensates with more than 6×104 particles after evaporative cooling for 170 ms and their subsequent release with a minimal expansion energy of 4.5 nK in one direction. Based on our results we estimate the performance of an atom interferometer and compare our source system to a high performance chip trap, as readily available for ultraprecise measurements in microgravity environments.
UR - http://www.scopus.com/inward/record.url?scp=85183967538&partnerID=8YFLogxK
U2 - 10.1103/physrevresearch.6.013139
DO - 10.1103/physrevresearch.6.013139
M3 - Article
VL - 6
JO - Physical Review Research
JF - Physical Review Research
SN - 2643-1564
IS - 1
M1 - 013139
ER -