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

Abstract

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.

References in corpus (4)

• Many-Body Physics with Ultracold Gases
• Nonlinearity induced destruction of resonant tunneling in the Wannier-Stark problem
• Resonant tunneling of Bose-Einstein condensates in optical lattices
• Dynamics of molecular nanomagnets in time-dependent external magnetic fields: Beyond the Landau-Zener-Stückelberg model

Cited by in corpus (6)

• Super-Adiabatic Particle Number in Schwinger and de Sitter Particle Production
• Nonlinear resonant tunneling of Bose-Einstein condensates in tilted optical lattices
• Superadiabatic driving of a three-level quantum system
• Exact numerical methods for a many-body Wannier Stark system
• Engineering of Landau-Zener tunneling
• Nonadiabatic quantum chaos in atom optics