Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 50: Quantum Gases (Bosons) V
Q 50.2: Vortrag
Mittwoch, 7. März 2018, 14:15–14:30, K 2.020
Many-body interference in a bosonic Josephson junction — •Gabriel Dufour1,2, Jasper Dohse1, Tobias Brünner1, Alberto Rodríguez1, and Andreas Buchleitner1 — 1Physikalisches Institut, Albert-Ludwigs-Universität-Freiburg, Hermann-Herder-Straße 3, D-79104, Freiburg, Germany — 2Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität-Freiburg, Albertstraße 19, D- 79104 Freiburg, Germany
The interference of two photons on a balanced beamsplitter reveals their mutual degree of indistinguishability, with the probability of measuring one photon in each output mode going from zero if the photons are identical, to one half if they are fully distinguishable, as demonstrated in the Hong-Ou-Mandel experiment [1]. We extend this line of thought to the case of many interacting bosons trapped in a double-well potential and study how the evolution is affected when the bosons can be distinguished through an internal degree of freedom. Based on the structure of the underlying many-body Hilbert space, we identify dynamical signatures of the initial state's degree of distinguishability both in the weakly and strongly interacting regimes [2,3].
[1] C.K. Hong, Z.Y. Ou, L. Mandel, Phys. Rev. Lett. 59, 2044 (1987)
[2] G. Dufour, T. Brünner, C. Dittel, G. Weihs, R. Keil, A. Buchleitner, arXiv:1706.05833 (2017), to appear in NJP
[3] T. Brünner, G. Dufour, A. Rodríguez, A. Buchleitner, arXiv:1710.08876 (2017)