We analyze quantum interference and decoherence effects in single-molecule junctions both experimentally and theoretically by means of the mechanically controlled break junction technique and density-functional theory. We consider the case where interference is provided by overlapping quasidegenerate states. Decoherence mechanisms arising from electronic-vibrational coupling strongly affect the...

We present a theoretical design for a single-mode, truly subwavelength terahertz disk laser based on a nanocomposite gain medium comprising an array of normal-metal/ferromagnetic (FM) point contacts embedded in a thin dielectric layer. Stimulated emission of light occurs due to spin-flip relaxation of spin-polarized electrons injected from the FM side of the contacts. Ultrahigh electrical curre...

The Sept. 20 news release from Geneva was terse: An incident the previous day had caused ?a large helium leak? into a section of the 17-mile (27 km) circular tunnel under the French-Swiss border that is home of the world?s most powerful particle accelerator?the Large Hadron Collider, or LHC. No injuries or ?risk to people? occurred, reported the European Organization for Nuclear Research (CERN)...

A capillary plasma z-pinch as an alternative active medium of soft X-Ray lasers was studied experimentally and theoretically. The theoretical analysis was based on the self consistent solution of the so called “snow plow” model. The dynamics of pinched plasma is determined by the capillary parameters and by the time dependence of electrical current passing through it. The current time dependenc...

this paper is a preliminary communication of a study on removal and recovery of heavy metalsfrom industrial waste waters using electro-coagulation (ec) technique. the larger study envisages use of solarenergy for producing the d.c. current, and simple chemical methods of standard methods in chemistry like useof hydrochloric acid, hydrogen sulfide, collection of precipitate, incineration and get...

Sensing of electrical quantities e.g. current and charges at micro and nano level is a challenging task for the researchers. Most of the electrical quantities produced as a result of natural phenomenon are very small and need infinitesimally small sensors to be detected. The authors of this paper are developing an appropriate micro/nano array sensor that is capable of sensing ionic currents in ...

In this study electrical discharge process was used to increase surface wear resistance of pure aluminum. Pulse-on-time and pulse current were considered as input parameters of the electrical discharge process. Experimental results reveal that the electrical discharge process is a successful method for improving the surface wear resistance of aluminum, so that this method has greatly increased ...

We consider a reconstruction formula for the internal conductivity and uniqueness of conductivity in magnetic resonance electrical impedance tomography (MREIT) which aims to reconstruct the conductivity distribution using internal current distribution. We provide a counter-example of uniqueness for a single measurement of current density with Neumann boundary data and show that at least two mea...

We present cross-sectional conductivity and current density images of an animal subject using a 3T Magnetic Resonance Electrical Impedance Tomography (MREIT) system. We injected currents into a postmortem 10Kg piglet in two different directions and measured the induced magnetic flux densities using a 3T MRI scanner. In order to handle defects in the measurements due to MR signal void in a gas-f...