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.
Details
- Organisationseinheit(en)
-
Institut für Quantenoptik
Institut für Theoretische Physik
SFB 1227: Designte Quantenzustände der Materie (DQ-mat)
- Externe Organisation(en)
-
DLR-Institut für Satellitengeodäsie und Inertialsensorik
- Typ
- Artikel
- Journal
- Physical Review Letters
- Band
- 127
- ISSN
- 0031-9007
- Publikationsdatum
- 01.10.2021
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Allgemeine Physik und Astronomie
- Elektronische Version(en)
-
https://arxiv.org/abs/2010.15796 (Zugang:
Offen
)
https://doi.org/10.1103/PhysRevLett.127.140402 (Zugang: Geschlossen )
