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

authored by: Fabian Anders, Luca Pezzè, Augusto Smerzi, Carsten Klempt
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.
Organisation(s): Institute of Quantum Optics
CRC 1227 Designed Quantum States of Matter (DQ-mat)
External Organisation(s): CNR National Institute of Optics (INO)
European Laboratory for Non-linear Spectroscopy (LENS)
QSTAR
Type: Article
Journal: Physical Review A
Volume: 97
ISSN: 2469-9926
Publication date: 04.2018
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Atomic and Molecular Physics, and Optics
Electronic version(s): https://doi.org/10.1103/PhysRevA.97.043813 (Access: Closed)
https://doi.org/10.15488/3591 (Access: Open)

BibTeX

@article{7a01438ee2ed4fc8818d4a2a17533fac,
title = "Phase magnification by two-axis countertwisting for detection-noise robust interferometry",
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.",
author = "Fabian Anders and Luca Pezz{\`e} and Augusto Smerzi and Carsten Klempt",
note = "Funding information: We thank Monika Schleier-Smith for helpful discussions and Marco Gabbrielli for stimulating remarks and for reading the manuscript. We also thank an anonymous referee for important remarks that triggered further analysis. C.K. acknowledges support from the Deutsche Forschungsgemeinschaft (DFG) through CRC 1227 (DQ-mat), Project No. A02. F.A. acknowledges support from the Hannover School for Nanotechnology (HSN) and the ERASMUS+ program.",
year = "2018",
month = apr,
doi = "10.1103/PhysRevA.97.043813",
language = "English",
volume = "97",
journal = "Physical Review A",
issn = "2469-9926",
publisher = "American Physical Society",
number = "4",
}