Dresden 2011 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie
Q 57.25: Poster
Donnerstag, 17. März 2011, 16:30–19:30, P1
An atomic parametic amplifier for the production of non-classical States — Manuel Scherer1, •Bernd Lücke1, Jens Kruse1, Jan Peise1, Oliver Topic1, Frank Deuretzbacher2, Wolfgang Ertmer1, Jan Arlt3, Luis Santos2, and Carsten Klempt1 — 1Institut für Quantenoptik, Leibniz Universität Hannover, — 2Institut für Theoretische Physik, Leibniz Universität Hannover — 3QUANTOP, Department of Physics and Astronomy, University of Aarhus
In optics, parametric amplification is one of the most important tools to prepare non-classical states and investigate phenomena like squeezing and entanglement. In our experiment, we expand this process to the field of ultra cold atoms where we observe non-classical states of matter.
We use the non-linearity of the interactions in Bose-Einstein-Condensates with a spin degree of freedom to generate two entangled ensembles of atoms in the magnetic states mF=± 1. These ensembles are analog to the signal and idler beam of an optical parametric amplifier and thus show non-classical correlations.
One effect of these correlations is a reduced fluctuation of the population of the magnetic sub-states. We measured the corresponding variance to be well below the shot-noise limit. The measurements are consistent with the properties of a twin Fock-state with exactly the same number of atoms in both sub-states. Such twin-Fock states may be used to perform interferometric measurements at the Heisenberg-limit.