Order-by-disorder in classical oscillator systems

Quantum Harmonic Oscillator Systems with Disorder

We study many-body properties of quantum harmonic oscillator lattices with disorder. A sufficient condition for dynamical localization, expressed as a zero-velocity LiebRobinson bound, is formulated in terms of the decay of the eigenfunction correlators for an effective one-particle Hamiltonian. We show how state-of-the-art techniques for proving Anderson localization can be used to prove that ...

Highly efficient noise-assisted energy transport in classical oscillator systems.

Photosynthesis is a biological process that involves the highly efficient transport of energy captured from the Sun to a reaction center, where conversion into useful biochemical energy takes place. Using a quantum description, Rebentrost et al. [New J. Phys. 11, 033003 (2009)] and Plenio and Huelga [New J. Phys. 10, 113019 (2008)] have explained this high efficiency as the result of the interp...

Classical Fano Oscillator

Elementary Excitations in Order-Disorder Systems Studied by NQR*

NQR and NMR methods allow for the investigation of incommensurately modulated structure because the resonance frequencies change in space in such a way that they reflect the variation of the incommensurate (I) modulation. Much work has been carried out on the steady state of these systems, but dynamical studies are limited [1, 2]. The NQR spinlattice relaxation time Tj has been studied by us an...

Order and disorder in open systems

In isolated physical systems differences in pressure, temperature, and chemical potential tend to even out. This principle of decay is called the second law of thermodynamics. It can be derived from the assumed randomness of molecular motion. The second law was postulated by the French physicist Sadi Carnot in his 1824 paper Reflections on the Motive Power of Fire [1], which presented the view ...