A method used to obtain frequencies in precise ratios of 2/3 and 1/3 of the pump is described as a possible way to extend the usable range of octave-spanning optical frequency combs for frequency metrology applications. The divider is based on a selfphase locked optical parametric oscillation in a doubly resonant semi-monolithic optical cavity containing a dual-grating periodically poled lithiu...

We analyze the periodic tunneling of a Bose-Einstein condensate in a doublewell potential which has an oscillating energy barrier. We show that the dynamics of the Bose condensate critically depends on the frequency ω of the oscillating energy barrier. In the regime of periodic macroscopic quantum tunneling (PMQT) with frequency ωJ , the population imbalance of the condensate in the two wells c...

We calculate the influence of excess noise on parametric down conversion in an unstable optical parametric oscillator ~OPO!, using a quantum quasimode description. We find a strongly enhanced pair photon generation rate below threshold as compared to a conventional stable cavity setup of comparable gain and loss. In addition, the oscillation threshold is lowered due to the influence of the exce...

<abstract> <p>We investigated a physical system for unsteady blood flow and solute transport in section of constricted porous artery. The aim this study was to determine effects hematocrit, stenosis, pulse oscillation, diffusion, convection chemical reaction on the transport. significance uncovering combined roles played by stenosis height, oscillation period, reactive rate, speed, ...

The feasibility of a Heisenberg limited phase measurement using a MachZehnder interferometer fed with twin photon correlated light is investigated. To take advantage of the Heisenberg limit, 1/N , for the phase sensitivity, one wants the number of correlated photons, N , to be high. This favors the use of parametric oscillation rather than the weaker but better correlated source given by parame...

Optical microresonators are ideal tools for the reduction of the threshold of optical parametric oscillation based on four-wave mixing. Usually, the efficiency and bandwidth of the resonant process are interdependent due to stringent phase matching requirements leading to limitation of the bandwidth of the spectrum generated for a given pump power. We demonstrate a continuous-wave low-threshold...

In conventional computers, wiring between transistors is required to enable the execution of Boolean logic functions. This has resulted in processors in which billions of transistors are physically interconnected, which limits integration densities, gives rise to huge power consumption and restricts processing speeds. A method to eliminate wiring amongst transistors by condensing Boolean logic ...

This study analyzes the absolute stability in P and PD type fuzzy logic control systems with both certain and uncertain linear plants. Stability analysis includes the reference input, actuator gain and interval plant parameters. For certain linear plants, the stability (i.e. the stable equilibriums of error) in P and PD types is analyzed with the Popov or linearization methods under various ref...

Providing all parameters according to two groups of limit states at the design stage is a multi–criteria task. Optimal helps perform such tasks. When phenomenon resonance occurs, it necessary change frequency forced oscillations load–bearing structures various tanks and coatings in order ensure sufficient strength stability structure building general. For this purpose, there separate type probl...