Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 34: Poster 1

Q 34.25: Poster

Dienstag, 13. März 2012, 16:30–19:00, Poster.I+II

Generation of non-classical states of matter using spinor dynamicsBernd Lücke1, Manuel Scherer1, Jens Kruse1, Luca Pezze2, Frank Deuretzbacher3, Philipp Hyllus4, Oliver Topic1, •Jan Peise1, Wolfgang Ertmer1, Jan Arlt5, Luis Santos3, Augusto Smerzi2, and Carsten Klempt11Institut für Quantenoptik, Leibniz Universität Hannover, Hannover, Germany — 2Istituto Nazionale di Ottica (INO), Consiglio Nazionale delle Ricerche (CNR), and European Laboratory for Non-Linear Spectroscopy (LENS), Firenze, Italy — 3Institut für Theoretische Physik, Leibniz Universität Hannover, Hannover, Germany — 4Department of Theoretical Physics, The University of the Basque Country, Bilbao, Spain — 5Center for Quantum Optics (QUANTOP), Institut for Fysik og Astronomi, Aarhus Universitet, Århus C, Denmark

In optics, parametric amplification is an important tool to generate non-classical states of light and investigate phenomena such as squeezing and entanglement. This technique can be transferred to matter-waves by using spinor dynamics in Bose-Einstein condensates. To generate non-classical states of matter we use spin changing collisions in a BEC initially prepared in the mF=0 state. These collisions may lead to the creation of correlated pairs of atoms with spin up and down (mF=±1). The pair production implies a reduced fluctuation in the population imbalance in mF=±1. We measured the corresponding variance to be well below the shot-noise limit (−6.9 dB). The measurements are in agreement with the properties of a twin-Fock state and thus point towards interferometry at the Heisenberg limit.

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