4 papers
Berry phase and adiabaticity of a spin diffusing in a non-uniform magnetic field
S. A. van Langen, H. P. A. Knops, J. C. J. Paasschens +1
An electron spin moving adiabatically in a strong, spatially non-uniform magnetic field accumulates a geometric phase or Berry phase, which might be observable as a conductance osc…
Brightness of a phase-conjugating mirror behind a random medium
J. C. J. Paasschens, P. W. Brouwer, C. W. J. Beenakker
A random-matrix theory is presented for the reflection of light by a disordered medium backed by a phase-conjugating mirror. Two regimes are distinguished, depending on the relativ…
Localization in a Disordered Multi-Mode Waveguide with Absorption or Amplification
T. Sh. Misirpashaev, J. C. J. Paasschens, C. W. J. Beenakker
An analytical and numerical study is presented of transmission of radiation through a multi-mode waveguide containing a random medium with a complex dielectric constant $ε= ε'+iε''…
Probability of Reflection by a Random Laser
C. W. J. Beenakker, J. C. J. Paasschens, P. W. Brouwer
A theory is presented (and supported by numerical simulations) for phase-coherent reflection of light by a disordered medium which either absorbs or amplifies radiation. The distri…