Unidirectional Charge Transport via Ripplonic Polarons in a Three-Terminal Microchannel Device.

We study the transport of surface electrons on superfluid helium through a microchannel structure in which the charge flow splits into two branches, one flowing straight and one turned at 90°. According to Ohm's law, an equal number of charges should flow into each branch. However, when the electrons are dressed by surface excitations (ripplons) to form polaronlike particles with sufficiently large effective mass, all the charge follows the straight path due to momentum conservation.

Cell shape-independent FtsZ dynamics in synthetically remodeled bacterial cells.

FtsZ is the main regulator of bacterial cell division. It has been implicated in acting as a scaffolding protein for other division proteins, a force generator during constriction, and more recently, as an active regulator of septal cell wall production. FtsZ assembles into a heterogeneous structure coined the Z-ring due to its resemblance to a ring confined by the midcell geometry.

Strong Coupling of the Cyclotron Motion of Surface Electrons on Liquid Helium to a Microwave Cavity.

The strong coupling regime is observed in a system of two-dimensional electrons whose cyclotron motion is coupled to an electromagnetic mode in a Fabry-Perot cavity resonator. Rabi splitting of eigenfrequencies of the coupled motion is observed both in the cavity reflection spectrum and ac current of the electrons, the latter probed by measuring their bolometric photoresponse. Despite the fact that similar observations of Rabi splitting in many-particle systems have been described as a quantum-mechanical effect, we show that the observed splitting can be explained completely by a model based on classical electrodynamics.

Photoconductivity Response at Cyclotron-Resonance Harmonics in a Nondegenerate Two-Dimensional Electron Gas on Liquid Helium.

We report the first observation of an oscillatory photoconductivity response at the cyclotron-resonance harmonics in a nondegenerate 2D electron system formed on the free surface of liquid helium. The dc conductivity oscillations are detected for electrons occupying the ground surface subband. Their period is governed by the ratio of the microwave frequency to the cyclotron frequency.

A possible solution for charge sensing in vertical double quantum dots.

We report the observation of a peculiar charge stability diagram of a vertical double quantum dot, where the conventional Coulomb diamond edges have a sawtooth-like shape. This feature could be understood if we assume the formation of a third quantum dot in the semiconductor volume which is supposed to be a part of the source in the standard quantum dot measurement circuit. The size of this additional dot is larger compared to the size of the original ones, thus the charging energy is smaller, but it still exceeds the thermal energy and affects the electron transport through the structure.