Momentum Entanglement for Atom Interferometry

authored by: F. Anders, A. Idel, P. Feldmann, D. Bondarenko, S. Loriani, K. Lange, J. Peise, M. Gersemann, B. Meyer-Hoppe, S. Abend, N. Gaaloul, C. Schubert, D. Schlippert, L. Santos, E. Rasel, C. Klempt
Abstract: The Standard Quantum Limit (SQL) restricts the sensitivity of atom interferometers employing unentangled ensembles. Inertially sensitive light-pulse atom interferometry beyond the SQL requires the preparation of entangled atoms in different momentum states. So far, such a source of entangled atoms that is compatible with state-of-the-art interferometers has not been demonstrated. Here, we report the transfer of entanglement from the spin degree of freedom of a Bose-Einstein condensate to well-separated momentum modes. A measurement of number and phase correlations between the two momentum modes yields a squeezing parameter of -3.1(8) dB. The method is directly applicable for a future generation of entanglement-enhanced atom interferometers as desired for tests of the Einstein Equivalence Principle and the detection of gravitational waves.
Organisation(s): Institute of Quantum Optics
Institute of Theoretical Physics
CRC 1227 Designed Quantum States of Matter (DQ-mat)
External Organisation(s): DLR-Institute for Satellite Geodesy and Inertial Sensing
Type: Article
Journal: Physical Review Letters
Volume: 127
ISSN: 0031-9007
Publication date: 01.10.2021
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: General Physics and Astronomy
Electronic version(s): https://arxiv.org/abs/2010.15796 (Access: Open)
https://doi.org/10.1103/PhysRevLett.127.140402 (Access: Closed)

BibTeX

@article{cff1be8f65c7490e8b98bdfda75c0401,
title = "Momentum Entanglement for Atom Interferometry",
abstract = "The Standard Quantum Limit (SQL) restricts the sensitivity of atom interferometers employing unentangled ensembles. Inertially sensitive light-pulse atom interferometry beyond the SQL requires the preparation of entangled atoms in different momentum states. So far, such a source of entangled atoms that is compatible with state-of-the-art interferometers has not been demonstrated. Here, we report the transfer of entanglement from the spin degree of freedom of a Bose-Einstein condensate to well-separated momentum modes. A measurement of number and phase correlations between the two momentum modes yields a squeezing parameter of -3.1(8) dB. The method is directly applicable for a future generation of entanglement-enhanced atom interferometers as desired for tests of the Einstein Equivalence Principle and the detection of gravitational waves.",
author = "F. Anders and A. Idel and P. Feldmann and D. Bondarenko and S. Loriani and K. Lange and J. Peise and M. Gersemann and B. Meyer-Hoppe and S. Abend and N. Gaaloul and C. Schubert and D. Schlippert and L. Santos and E. Rasel and C. Klempt",
note = "Funding Information: We thank A. Smerzi and G. T{\'o}th for valuable discussions and J. Arlt for a critical review of the Letter. We acknowledge support from the European Union through the QuantERA Grant No. 18-QUAN-0012-01 (CEBBEC). The work is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany{\textquoteright}s Excellence Strategy—EXC-2123 QuantumFrontiers—390837967, and through CRC 1227 (DQ-mat), projects A02 and B07. F. A. acknowledges support from the Hannover School for Nanotechnology (HSN). D. S. acknowledges support by the Federal Ministry of Education and Research (BMBF) through the funding program Photonics Research Germany under Contract No. 13N14875.",
year = "2021",
month = oct,
day = "1",
doi = "10.1103/PhysRevLett.127.140402",
language = "English",
volume = "127",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "14",
}