Details
| Original language | English |
|---|---|
| Article number | 043813 |
| Journal | Physical Review A |
| Volume | 97 |
| Issue number | 4 |
| Early online date | 9 Apr 2018 |
| Publication status | Published - Apr 2018 |
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.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
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In: Physical Review A, Vol. 97, No. 4, 043813, 04.2018.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Phase magnification by two-axis countertwisting for detection-noise robust interferometry
AU - Anders, Fabian
AU - Pezzè, Luca
AU - Smerzi, Augusto
AU - Klempt, Carsten
N1 - 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.
PY - 2018/4
Y1 - 2018/4
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85045337784&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.97.043813
DO - 10.1103/PhysRevA.97.043813
M3 - Article
AN - SCOPUS:85045337784
VL - 97
JO - Physical Review A
JF - Physical Review A
SN - 2469-9926
IS - 4
M1 - 043813
ER -