We report on evanescently coupled rectangular microresonators with dimensions up to 20 × 10 μm2 in silicon-on-insulator in an add-drop filter configuration. The influence of the geometrical parameters of the device was experimentally characterized and a high Q value of 13,000 was demonstrated as well as the multimode optical resonance characteristics in the drop port. We also show a 95% energy ...

In this presentation, we obtain the corresponding universal function to diffractive process and show cross section exhibits geometrical scaling. It is observed theory according color dipole approach at small-$x$ a convenient framework that reveals transparency saturation phenomena. Also calculate contribution of heavy quark productions in for high energy determined by small size configuration. ...

tip leakage loss introduces major part of losses of the rotor in axial gas turbines. therefore, the rotor blade tip has a considerable effect on rotor efficiency. to understand the flow physics of the rotor tip leakage, we solve the flow field for different tip platforms (passive flow control) and by considering coolant tip injection (active flow control). various blade tip configurations such ...

Considering the paradigmatic case of a cloud two-level atoms interacting through common vacuum modes, we show how cooperative spontaneous emission, which is at origin superradiance, leads system to long-lived entangled states late times. These subradiant modes are characterized by an entanglement between all particles, independently their geometrical configuration. While there no threshold on i...

The Raychaudhuri equation is derived by assuming geometric flow in space–time M of n+1 dimensions. turns into a harmonic oscillator form under suitable transformations. Thereby, relation between geometrical entropy and mean geodesic deviation established. This has connection to chaos theory where the trajectories diverge exponentially. We discuss its application cosmology black holes. Thus, we ...

Unsteady flow computations are presented for a Gulfstream aircraft model in landing configuration, i.e., flap deflected 39° and main landing gear deployed. The simulations employ the lattice Boltzmann solver PowerFLOW to simultaneously capture the flow physics and acoustics in the near field. Sound propagation to the far field is obtained using a Ffowcs Williams and Hawkings acoustic analogy ap...

Rubik's Cube is one of the most famous combinatorial puzzles involving nearly $4.3 \times 10^{19}$ possible configurations. Its mathematical description expressed by group, whose elements define how its layers rotate. We develop a unitary representation such group and quantum formalism to describe from geometrical constraints. Cubies are describedby single particle states which turn out behave ...

The ultraviolet photoelectron spectrum of F2O was recorded with a higher resolution than previously published. New vibrational structure was observed in the second and third bands. Near state-of-the-art molecular orbital calculations were performed on the X̃ A1 state of F2O and the X̃ B1 , B2 , A1 , and A2 state of F2O , and their potential energy functions were computed. Spectral simulations bas...

We enumerate and classify nearly all of the possible mechanically stable (MS) packings of bidipserse mixtures of frictionless disks in small sheared systems. We find that MS packings form continuous geometrical families, where each family is defined by its particular network of particle contacts. We also monitor the dynamics of MS packings along geometrical families by applying quasistatic simp...