Quasihole dynamics as a detection tool for quantum Hall phases
arXiv:1210.2898 · doi:10.1103/PhysRevA.86.053629
Abstract
Existing techniques for synthesizing gauge fields are able to bring a two-dimensional cloud of harmonically trapped bosonic atoms into a regime where the occupied single-particle states are restricted to the lowest Landau level (LLL). Repulsive short-range interactions drive various transitions from fully condensed into strongly correlated states. In these different phases we study the response of the system to quasihole excitations induced by a laser beam. We find that in the Laughlin state the quasihole performs a coherent constant rotation around the center, ensuring conservation of angular momentum. This is distinct to any other regime with higher density, where the quasihole is found to decay. At a characteristic time, the decay process is reversed, and revivals of the quasihole can be observed in the density. Measuring the period and position of the revival can be used as a spectroscopic tool to identify the strongly correlated phases in systems with a finite number of atoms.
8 pages, 5 figures
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Cited by in corpus (8)
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- Single-site-resolved measurement of the current statistics in optical lattices
- Nanoplasmonic planar traps - a tool for engineering p-wave interactions
- Optical control over bulk excitations in fractional quantum Hall systems
- Quantum simulation of conductivity plateaux and fractional quantum Hall effect using ultracold atoms
- Strongly correlated states of trapped ultracold fermions in deformed Landau levels
- Dynamics of quasiholes and quasiparticles at the edges of small lattices