Multi-loop atomic Sagnac interferometry

Schubert, Christian; Abend, Sven; Gersemann, Matthias; Gebbe, Martina; Schlippert, Dennis; Berg, P.; Rasel, Ernst M.

doi:10.1038/s41598-021-95334-7

Cited by 20 publications

(12 citation statements)

References 82 publications

(151 reference statements)

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“…Note that the initial mean atomic density at a s = 1.7a 0 is estimated as 2.9E13 − 4.5E13 /cm 3 , depending on the initial loading condition. The mirror pulse efficiency 1 − b has the highest value at a s < 6a 0 , and gradually reduces at larger a s because of the enlarged interaction-induced momentum width [15,22,23]. Note that the initial center-of-mass momentum also degrades the mirror efficiency but the theoretical upper bound for our case is 99.98%, which is negligible degradation.…”

Section: Scaling Behavior Of Cold Collisionsmentioning

confidence: 61%

“…We have also demonstrated quantum lock-in amplification [18]. The system may be useful for multiple-loop Sagnac interferometry [15], for noise spectrum analysis [35] and, perhaps, for resonant detection of gravitational waves [41].…”

mentioning

confidence: 95%

“…That is a very desirable characteristic for an atom interferometer that is practical to use outside of the laboratory. The interferometer is particularly well-suited to measuring rotation through the Sagnac effect [15,16] and to probing interesting weak interactions [19,20] on micron-scale distances.…”

mentioning

confidence: 99%

“…We report a guided atom interferometer exhibiting high contrast fringes with an interrogation time of over one second in a waveguide with significant curvature. Using a non-interacting Bose-Einstein condensate as the matter wave source enables a multiple loop scheme [14][15][16] involving hundreds of short round trips in the guide because the contrast-degrading scattering that occurs when the wavepackets pass through each other is suppressed. The fast modulation of wavepacket momentum by the high reflection rate implements a form of dynamic decoupling [17] or phase sensitive detection [18] that greatly reduces the effect of technical phase noise in the interferometer, to the point where the instrument operates in a noisy environment with no vibration isolation or stabilization of the inertial reference mirror.…”

mentioning

confidence: 99%

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One second interrogation time in a 200 round-trip waveguide atom interferometer

Kim¹,

Krzyżanowska²,

Henderson³

et al. 2022

Preprint

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We report a multiple-loop guided atom interferometer in which the atoms make 200 small-amplitude roundtrips, instead of one large single orbit. The approach is enabled by using ultracold 39 K gas and a magnetic Feshbach resonance that can tune the s-wave scattering length across zero to significantly reduce the atom loss from cold collisions. This scheme is resilient against noisy environments, achieving 0.9 s interrogation time without any vibration noise isolation or cancellation. A form of quantum lock-in amplification can be used with the device to measure localized potentials with high sensitivity. We used this technique to measure the dynamic polarizability of the 39 K ground state at 1064 nm. The interferometer may also be a useful approach to building a compact multiple-loop Sagnac atom interferometer for rotation sensing.

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Section: Scaling Behavior Of Cold Collisionsmentioning

confidence: 61%

mentioning

confidence: 95%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

One second interrogation time in a 200 round-trip waveguide atom interferometer

Kim¹,

Krzyżanowska²,

Henderson³

et al. 2022

Preprint

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“…Furthermore, freespace cold atom interferometers are currently quite large, heavy, consume significant power, are expensive, and are technologically complex [5]. However, a new multi-loop concept which can significantly improve the performance of free-space interferometers was recently proposed [11].…”

Section: Introductionmentioning

confidence: 99%

Multi-pass guided atomic Sagnac interferometer for high-performance rotation sensing

Moukouri,

Japha,

Keil

et al. 2021

Preprint

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Matter-wave interferometry with atoms propagating in a guiding potential is expected to provide compact, scalable and precise inertial sensing. However, a rotation sensing device based on the Sagnac effect with atoms guided in a ring has not yet been implemented despite continuous efforts during the last two decades. Here we discuss some intrinsic effects that limit the coherence in such a device and propose a scheme that overcomes these limitations and enables a multi-pass guiding Sagnac interferometer with a Bose-Einstein condensate (BEC) on a chip in a ring potential. We analyze crucial dephasing effects: potential roughness, phase diffusion due to atom-atom interactions and number uncertainty, and phase fluctuations. Owing to the recent progress in achieving high momentum beam splitting, creating smooth guides, and manipulating the matter-wavepacket propagation, guided interferometry can be implemented within the coherence time allowed by phase diffusion. Despite the lower particle flux in a guided Sagnac ring and the miniaturization of the interferometer, the estimated sensitivity, for reasonable and practical realizations of an atom chipbased gyroscope, is comparable to that of free-space interferometers, reaching 45 nrad s -1 Hz -1/2 . A significant improvement over state-of-the-art free-space gyrocope sensitivities can be envisioned by using thermal atoms instead of a BEC, whereby the interferometer can be operated in a continuous fashion with the coherence limited by the scattering rate of the atoms with the background gas. Taking into account the sensitivity times length of the interferometer as the figure of merit which takes into account compactness, our configuration is expected to deliver a potential improvement of 2-4 orders of magnitude over state-of-the-art free-space gyroscopes for a BEC, and 4-6 orders of magnitude for thermal atoms.

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Toward atom interferometer gyroscope built on an atom chip

Kim²,

Kim

2023

J. Korean Phys. Soc.

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Multi-loop atomic Sagnac interferometry

Cited by 20 publications

References 82 publications

One second interrogation time in a 200 round-trip waveguide atom interferometer

One second interrogation time in a 200 round-trip waveguide atom interferometer

Multi-pass guided atomic Sagnac interferometer for high-performance rotation sensing

Toward atom interferometer gyroscope built on an atom chip

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