Controlled excitation and resonant acceleration of ultracold few-boson systems by driven interactions in a harmonic trap
arXiv:1112.4678 · doi:10.1103/PhysRevA.85.033635
Abstract
We investigate the excitation properties of finite utracold bosonic systems in a one-dimensional harmonic trap with a time-dependent interaction strength. The driving of the interatomic coupling induces excitations of the relative motion exclusively with specific and controllable contributions of momentarily excited many-body states. Mechanisms for selective excitation to few-body analogues of collective modes and acceleration occur in the vicinity of resonances. We study via the few-body spectrum and a Floquet analysis the excitation mechanisms, and the corresponding impact of the driving frequency and strength as well as the initial correlation of the bosonic state. The fundamental case of two atoms is analyzed in detail and forms a key ingredient for the bottom-up understanding of cases with higher atom numbers, thereby examining finite-size corrections to macroscopic collective modes of oscillation.
10 pages, 8 figures
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Cited by in corpus (10)
- Few-body Bose gases in low dimensions -- a laboratory for quantum dynamics
- Quantum breathing dynamics of ultracold bosons in 1D-harmonic traps: Unraveling the pathway from few- to many-body systems
- Two trapped particles interacting by a finite-ranged two-body potential in two spatial dimensions
- Faraday waves in collisionally inhomogeneous Bose-Einstein condensates
- Two Cold Atoms in a Time-Dependent Harmonic Trap in One Dimension
- Floquet analysis of the modulated two-mode Bose-Hubbard model
- Breathing mode in the Bose-Hubbard chain with a harmonic trapping potential
- Faraday and Resonant Waves in Dipolar Cigar-Shaped Bose-Einstein Condensates
- Solvable model of a generic driven mixture of trapped Bose-Einstein condensates and properties of a many-boson Floquet state at the limit of an infinite number of particles
- Two-channel Bose-Hubbard model of atoms at a Feshbach resonance