Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 35: Poster 2

Q 35.87: Poster

Mittwoch, 14. März 2012, 16:30–19:00, Poster.I+II

Interferometry and Multiparticle Entanglement — •Philipp Hyllus1,2, Luca Pezzé3,4, Augusto Smerzi1,4, Wieslaw Laskowski5, Roland Krischek6, Christian Schwemmer6, Witlef Wieczorek6,7, and Harald Weinfurter61INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, I-38050 Povo, Italy — 2Department of Theoretical Physics, The University of the Basque Country, E-48080 Bilbao, Spain — 3Laboratoire Charles Fabry, Institut d’Optique, 91127 Palaiseau, France — 4INO-CNR and LENS, 50125 Firenze, Italy — 5Fakultät für Physik, LMU Munich, D-80799 Munich, and Max-Planck Institut für Quantenoptik, D-85748 Garching, Germany — 6Institute of Theoretical Physics and Astrophysics, University of Gdańsk, PL-80-952 Gdańsk, Poland — 7Faculty of Physics, University of Vienna, A-1090 Vienna, Austria

Entangled quantum states allow for sub shot-noise sensitivity with linear interferometers, with applications in various fields such as quantum frequency standards, quantum lithography, quantum positioning and clock synchronization, and quantum imaging. This contribution discusses further the structure of entanglement needed for reaching the smallest phase uncertainties. In particular, we investigate the relation between entanglement of at most k particles in the probe state and the corresponding phase uncertainty both theoretically [1] and experimentally [2], using a Dicke state of 4 photons.

[1] P. Hyllus et al., arXiv/1006.4366; see also G. Tóth, arXiv/1006.4368. [2] R. Krischek et al., Phys. Rev. Lett. 107, 080504 (2011).

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