Phase magnification by two-axis countertwisting for detection-noise robust interferometry

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Anders, Fabian; Pezze, Luca; Smerzi, Augusto; Klempt, Carsten: Phase magnification by two-axis countertwisting for detection-noise robust interferometry. In: Physical Review A 97 (2018), Nr. 4, 43813. DOI: https://doi.org/10.1103/PhysRevA.97.043813

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Sum total of downloads: 172




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Abstract: 
Entanglement-enhanced atom interferometry has the potential of surpassing the standard quantum limit and eventually reaching the ultimate Heisenberg bound. The experimental progress is, however, hindered by various technical noise sources, including the noise in the detection of the output quantum state. The influence of detection noise can be largely overcome by exploiting echo schemes, where the entanglement-generating interaction is repeated after the interferometer sequence. Here, we propose an echo protocol that uses two-axis countertwisting as the main nonlinear interaction. We demonstrate that the scheme is robust to detection noise and its performance is superior compared to the already demonstrated one-axis twisting echo scheme. In particular, the sensitivity maintains the Heisenberg scaling in the limit of a large particle number. Finally, we show that the protocol can be implemented with spinor Bose-Einstein condensates. Our results thus outline a realistic approach to mitigate the detection noise in quantum-enhanced interferometry.
License of this version: Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2018
Appears in Collections:Fakultät für Mathematik und Physik

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downloads by country:

pos. country downloads
total perc.
1 image of flag of Germany Germany 86 50.00%
2 image of flag of United States United States 25 14.53%
3 image of flag of Denmark Denmark 23 13.37%
4 image of flag of China China 22 12.79%
5 image of flag of No geo information available No geo information available 2 1.16%
6 image of flag of Netherlands Netherlands 2 1.16%
7 image of flag of Ireland Ireland 2 1.16%
8 image of flag of France France 2 1.16%
9 image of flag of Iran, Islamic Republic of Iran, Islamic Republic of 1 0.58%
10 image of flag of Belgium Belgium 1 0.58%
    other countries 6 3.49%

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