Erlangen 2018 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 45: Ultracold Atoms II (joint session Q/A)

A 45.6: Vortrag

Freitag, 9. März 2018, 11:45–12:00, K 1.022

Revealing Quantum Statistics with a Pair of Distant Atoms — Christian Roos¹, •Andrea Alberti², Dieter Meschede², Philipp Hauke³, and Hartmut Häffner⁴ — ¹Institut für Quantenoptik und Quanteninformation der Österreichischen Akademie der Wissenschaften, Otto-Hittmair-Platz 1, 6020 Innsbruck, Austria — ²Institut für Angewandte Physik der Universität Bonn, Wegelerstraße 8, 53115 Bonn, Germany — ³Institut für Theoretische Physik, Universität Innsbruck, Technikerstraße 21a, 6020 Innsbruck, Austria — ⁴Department of Physics, University of California, Berkeley, California 94720, USA

Quantum statistics have a profound impact on the properties of systems composed of identical particles. At the most elementary level, Bose and Fermi quantum statistics differ in the exchange phase, either 0 or π, which the wave function acquires when two identical particles are exchanged. I will report on a scheme to directly probe the exchange phase with a pair of massive particles by physically exchanging their positions [1]. I present two protocols realizing this scheme where the particles always remain spatially well separated, thus ensuring that the exchange contribution to their interaction energy is negligible and that the detected signal can only be attributed to the exchange symmetry of the wave function. Finally, I discuss possible implementations using a pair of atoms confined in polarization-synthesized optical lattices or trapped ions forming a one-dimensional quantum rotor.

[1] C. F. Roos, A. Alberti, D. Meschede, P. Hauke, and H. Häffner, Phys. Rev. Lett. 119, 160401 (2017).