Details
| Original language | English |
|---|---|
| Article number | 140402 |
| Journal | Physical Review Letters |
| Volume | 127 |
| Issue number | 14 |
| Early online date | 29 Sept 2021 |
| Publication status | Published - 1 Oct 2021 |
Abstract
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In: Physical Review Letters, Vol. 127, No. 14, 140402, 01.10.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Momentum Entanglement for Atom Interferometry
AU - Anders, F.
AU - Idel, A.
AU - Feldmann, P.
AU - Bondarenko, D.
AU - Loriani, S.
AU - Lange, K.
AU - Peise, J.
AU - Gersemann, M.
AU - Meyer-Hoppe, B.
AU - Abend, S.
AU - Gaaloul, N.
AU - Schubert, C.
AU - Schlippert, D.
AU - Santos, L.
AU - Rasel, E.
AU - Klempt, C.
N1 - Funding Information: We thank A. Smerzi and G. Tóth 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’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.
PY - 2021/10/1
Y1 - 2021/10/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85116351320&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.127.140402
DO - 10.1103/PhysRevLett.127.140402
M3 - Article
VL - 127
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 14
M1 - 140402
ER -