Delta-Kick Squeezing

verfasst von
Robin Corgier, Naceur Gaaloul, Augusto Smerzi, Luca Pezzè
Abstract

We explore the possibility to overcome the standard quantum limit (SQL) in a free-fall atom interferometer using a Bose-Einstein condensate (BEC) in either of the two relevant cases of Bragg or Raman scattering light pulses. The generation of entanglement in the BEC is dramatically enhanced by amplifying the atom-atom interactions via the rapid action of an external trap focusing the matter-waves to significantly increase the atomic densities during a preparation stage -- a technique we refer to as delta-kick squeezing (DKS). The action of a second DKS operation at the end of the interferometry sequence allows to implement a non-linear readout scheme making the sub-SQL sensitivity highly robust against imperfect atom counting detection. We predict more than 30 dB of sensitivity gain beyond the SQL for the variance, assuming realistic parameters and \(10^6\) atoms.

Organisationseinheit(en)
Institut für Quantenoptik
QuantumFrontiers
SFB 1227: Designte Quantenzustände der Materie (DQ-mat)
Externe Organisation(en)
QSTAR
Università degli Studi di Firenze (UniFi)
Typ
Artikel
Journal
Physical Review Letters
Band
127
ISSN
0031-9007
Publikationsdatum
29.10.2021
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Physik und Astronomie (insg.)
Elektronische Version(en)
http://arxiv.org/abs/2103.10896v1 (Zugang: Offen)
https://doi.org/10.1103/PhysRevLett.127.183401 (Zugang: Geschlossen)