Dynamics in Mesoscopic Systems
2 days ago
- Mesoscopic systems are intermediate between micro and macro scales, often described with a mix of quantum and classical physics.
- In solid state physics, mesoscopic systems are larger than the lattice constant and Fermi wavelength but smaller than the mean free path or coherence length, typically in the nano- to micrometer range.
- Research focuses on dynamics in nanostructures, closely related to quantum chaos (wave chaos) in complex classically chaotic systems.
- A key phenomenon studied is branched flow: waves propagating through disordered media form branch-like structures due to weak correlated scattering.
- Branched flow occurs at scales much larger than wavelength/correlation length but much smaller than the mean free path, bridging to macroscopic behavior.
- Examples of branched flow include electron current density in 2D electron gas and tsunami waves focusing due to ocean depth fluctuations over thousands of kilometers.