Fast long-distance transport of cold cesium atoms

Klostermann, Till; Cabrera, Cesar R.; Raven, Hendrik von; Wienand, Julian F.; Schweizer, C.; Bloch, Immanuel; Aidelsburger, Monika

doi:10.1103/physreva.105.043319

Cited by 14 publications

(6 citation statements)

References 63 publications

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“…TAI differs from cold-atom free-space, point-source, and guided-wave AI in that the interfering atomic wave-packet components are transported in conservative, sub-micron to mm-sized, 3D traps that are formed by tractor potentials that move on predetermined trajectories [42][43][44]. The traps can be implemented via optical tweezers (tractor beams) [45][46][47][48], optical lattices [49][50][51][52], RF-dressed potentials [53][54][55][56][57] (including ring potentials [57,58]), optical or magnetic potentials on atom chips [59][60][61], etc, and any combination of these [62][63][64]. Uninterrupted 3D confinement in tractor traps (1) guarantees recombination, (2) allows arbitrary holding times, directional reversal, complex trajectory patterns for cancellation of sensitivities to inertial forces that are not of interest, and (3) addresses signal degradation caused by wave-function dispersion and limitations in recombination control.…”

Section: Conceptmentioning

confidence: 99%

Principles of tractor atom interferometry

Raithel

Duspayev

Dash

et al. 2022

Quantum Sci. Technol.

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We present possible design concepts for a tractor atom interferometer (TAI) based on three-dimensional confinement and transport of ultracold atoms. The confinement reduces device size and wave-packet dispersion, enables arbitrary holding times, and facilitates control to create complex trajectories that allow for optimization to cancel unwanted sensitivity, fast splitting and recombination, and suppression of detrimental nonadiabatic excitation. Thus, the design allows for further advancement of compact, high-sensitivity, quantum sensing technology. In particular, we focus on the implementation of quantum-enhanced accelerometers and gyroscopes. We discuss TAI protocols for both spin-dependent and scalar trapping potentials. Using optimal control theory, we demonstrate the splitting of the wave function on a time scale two orders of magnitude shorter than the previous proposal using adiabatic dynamics, thus maximizing the time spent at full separation, where the interferometric phase is accumulated. The performance estimates for TAI give a promising perspective for atom-interferometry-based sensing, significantly exceeding the sensitivities of current state-of-the-art devices.

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Section: Conceptmentioning

confidence: 99%

Principles of tractor atom interferometry

Raithel

Duspayev

Dash

et al. 2022

Quantum Sci. Technol.

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“…Magnetic traps have proven to be a suitable solution for moving thermal clouds at temperatures above the micro-Kelvin range over long distances of tens of centimeters, but at the cost of heating up the sample [2][3][4][5][6][7]. On the other hand, trapping the atomic cloud in optical lattices has proven to be a solution of choice for precise displacement of single atoms over distances of the order of the centimeter [8,9], for adiabatic centimeter-long transport of ultracold atoms [10], or fast transport of cold atoms in the decimeter range using Bessel beams [11]. Other solutions involving the use of a focus-tunable moiré lens [12], other optical systems of tunable-zoom [13] or optical tweezers [14] have also shown their interest to transport atomic cloud either on short distances with reasonably small heating or, on long distances, with more consequent warm-up of the atomic cloud and a weak confinement in the direction of transport.…”

Section: Introductionmentioning

confidence: 99%

“…We start with a cloud of a few micrometers [15]. To ensure an accurate control of the distance covered by the atoms and their vertical confinement throughout transport, we chose to transport them using a moving lattice [1,10,11].…”

Section: Introductionmentioning

confidence: 99%

Long-range temperature-controlled transport of ultra-cold atoms with an accelerated lattice

2023

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We report our method for transporting ultracold atoms over macroscopic distances and trapping them back in a vertical mixed trap, consisting of the superposition of a vertical lattice and a transverse confinement beam. The transport is performed with Bloch oscillations allowing us to move up to $25\%$ of a sub-micro-Kelvin atomic cloud on a distance of the order of 30 cm, without excessive heating and with an excellent control of its final position. The efficiency is lowered to about $10\%$ after trapping them in the vertical mixed trap during extended times.

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“…These methods are often speed limited ultimately by the low axial trap frequency of the ODT. There are also demonstrations of using moving 1D optical lattice to shuttle atoms [32][33][34], where one beam is a zero-order Bessel beam to maintain constant waist size over long distance.…”

Section: Introductionmentioning

confidence: 99%

Fast optical transport of ultracold molecules over long distances

Bao

Anderegg

et al. 2022

New J. Phys.

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Optically trapped laser-cooled polar molecules hold promise for new science and technology in quantum information and quantum simulation. Large numerical aperture optical access and long trap lifetimes are needed for many studies, but these requirements are challenging to achieve in a magneto-optical trap (MOT) vacuum chamber that is connected to a cryogenic buffer gas beam source, as is the case for all molecule laser cooling experiments so far. Long distance transport of molecules greatly eases fulfilling these requirements as molecules are placed into a region separate from the MOT chamber. We realize a fast transport method for ultracold molecules based on an electronically focus-tunable lens combined with an optical lattice. The high transport speed is achieved by the 1D red-detuned optical lattice, which is generated by interference of a focus-tunable laser beam and a focus-fixed laser beam. Efficiency of 48(8)% is realized in the transport of ultracold calcium monofluoride (CaF) molecules over 46 cm distance in 50 ms, with a moderate heating from 32(2) μK to 53(4) μK. Positional stability of the molecular cloud allows for stable loading of an optical tweezer array with single molecules.

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Fast long-distance transport of cold cesium atoms

Cited by 14 publications

References 63 publications

Principles of tractor atom interferometry

Principles of tractor atom interferometry

Long-range temperature-controlled transport of ultra-cold atoms with an accelerated lattice

Fast optical transport of ultracold molecules over long distances

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