Channel cross-correlations in transport through complex media

Abstract

Measuring transmission between four antennas in microwave cavities, we investigate directly the channel cross-correlations $C$ of the cross sections ${\sigma }^{ab}$ from antenna at ${\vec{r}}_a$ to antenna ${\vec{r}}_b$. Specifically we look for the $C_{\Sigma }$ and $C_{\Lambda }$, where the only difference is that $C_{\Lambda }$ has none of the four channels in common, whereas $C_{\Sigma }$ has exactly one channel in common. We find experimentally that these two channel cross-correlations are anti-phased as a function of the channel coupling strength, as predicted by theory. This anti-correlation is essential to give the correct values for the universal conductance fluctuations. To obtain a good agreement between experiment and predictions from random matrix theory the effect of absorption had to be included.

6 pages, 5 figures

References in corpus (4)

• A review of progress in the physics of open quantum systems: theory and experiment
• Probing decoherence through Fano resonances
• Microwave fidelity studies by varying antenna coupling
• Cross-Section Fluctuations in Chaotic Scattering Systems

Cited by in corpus (2)

• Light fields in complex media: mesoscopic scattering meets wave control
• Spatio-temporal correlations in multimode fibers for pulse delivery