Time-resolved measurement of Landau--Zener tunneling in different bases

Details Time-resolved measurement of Landau--Zener tunneling in different bases Time-resolved measurement of Landau--Zener tunneling in different bases

2010-07-08

arxiv.org/abs/1007.1326v1

Phys. Rev. A 82, 013633 (2010)

Physics

Condensed Matter

Quantum Gases

Scientific paper

10.1103/PhysRevA.82.013633

A comprehensive study of the tunneling dynamics of a Bose--Einstein condensate in a tilted periodic potential is presented. We report numerical and experimental results on time-resolved measurements of the Landau--Zener tunneling of ultracold atoms introduced by the tilt, which experimentally is realized by accelerating the lattice. The use of different protocols enables us to access the tunneling probability, numerically as well as experimentally, in two different bases, namely, the adiabatic basis and the diabatic basis. The adiabatic basis corresponds to the eigenstates of the lattice, and the diabatic one to the free-particle momentum eigenstates. Our numerical and experimental results are compared with existing two-state Landau--Zener models.

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