Hannover 2013 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 18: Quantum gases: Mixtures, spinor gases, disorder effects

Q 18.6: Talk

Monday, March 18, 2013, 17:45–18:00, E 001

Mesoscopic dynamics of ultracold atoms in random potentials — •Cord A. Müller — Centre for Quantum Technologies, National University of Singapore, 117543 Singapore

I will briefly review the nonequilibrium dynamics of ultracold matter waves in random potentials, which attracts currently vivid experimental and theoretical interest. The recent observation of coherent backscattering of cold atoms [1], precisely following the theoretical prediction [2], presently opens avenues for a more refined understanding of disorder-induced localisation dynamics, both in weak and strong disorder. After an initial phase of momentum isotropisation [3], a coherent Cooperon peak persists in the momentum distribution, and turns into a remarkable twin-peak signal at the onset of Anderson localisation [4], whose precise properties remain to be studied.

[1] F. Jendrzejewski et al., Phys. Rev. Lett. 109, 195302 (2012)

[2] N. Cherroret et al., Phys. Rev. A 85, 011604(R) (2012)

[3] T. Plisson, T. Bourdel, C.A. Müller, arXiv:1209.1477

[4] T. Karpiuk et al., Phys. Rev. Lett. 109, 190601 (2012)