Signal amplification in a qubit-resonator system

We study the dynamics of a qubit-resonator system, when the resonator is driven by two signals. The interaction of the qubit with the high-amplitude driving we consider in terms of the qubit dressed states. Interaction of the dressed qubit with the second probing signal can essentially change the amplitude of this signal. We calculate the transmission amplitude of the probe signal through the resonator as a function of the qubit's energy and the driving frequency detuning. The regions of increase and attenuation of the transmitted signal are calculated and demonstrated graphically. We present the influence of the signal parameters on the value of the amplification, and discuss the values of the qubit-resonator system parameters for an optimal amplification and attenuation of the weak probe signal.Comment: 7 pages, 8 figure

Gyroscope deviation from geodesic motion: quasiresonant oscillations on a circular orbit

General relativistic spin-orbit interaction leads to the quasiresonant oscillation of the gyroscope mass center along the orbital normal. The beating amplitude does not include the speed of light and equals the ratio of the intrinsic momentum of the gyroscope to its orbital momentum. The modulation frequency equals the angular velocity of the geodetic precession that prevents the oscillation from resonance. The oscillation represents the precession of the gyroscope orbital momentum. Within an acceptable time the oscillation amplitude reaches the values that are amenable to being analyzed experimentally. Taking into account the source oblateness decreases the beating amplitude and increases the modulation frequency by the factor that is equal to the ratio of the quadrupole precession velocity to the geodetic precession velocity. The period of the quadrupole precession turns out to be a quite sufficient time to form a measurable amplitude of the oscillation.Comment: 5 pages, LaTeX2e, 1 eps figure, to appear in J. Exp. Theor. Phy

GRB Sky Distribution Puzzles

We analyze the randomness of the sky distribution of cosmic gamma-ray bursts. These events are associated with massive galaxies, spiral or elliptical, and therefore their positions should trace the large-scale structure, which, in turn, could show up in the sky distribution of fluctuations of the cosmic microwave background (CMB). We test this hypothesis by mosaic correlation mapping of the distributions of CMB peaks and burst positions, find the distribution of these two signals to be correlated, and interpret this correlation as a possible systematic effect.Comment: 12 pages, 16 figures, 1 tabl

Analysis to efficiency discrete covering worker organ when clearing vegetable raw material

In article is executed analysis to efficiency of the functioning the cleansing equipment for different type vegetable cheese: potatoes, carrot, pommel and the other type potatoes. He is indicative of that that much of the cleansing equipment uses as worker organ abrasive put, which improvement is one of the directions of increasing to his efficiency and improvements of his field-performance data. Classical model of the motion club is considered In process of the analysis in camera of the cleansing machine. For optimization of the process peelings is installed path of the motion and is calculated corner of the flight club with cone-shaped chalice. When shaping the models is considered apart taken tuber of the potatoes. Expecting his uniform sphere and without regard influence upon it other club, have defined the path of his motion on cone-shaped chalice and corner, under which tuber flies to wall. The Corner of the slopping cone chalices 30 degrees took to horizon. Integrating equation on time, got the equation of the energy balance, from which possible select required for peelings time. The Further analysis conducted the methods of the numerical experiment in system Mathcad. Got in this experiment results allow to optimize the drawing a fixing abrasive bands, taking into consideration designed methods of the shaping for such object, as worker organs cleansing machines, technology of the intermittent fixing covering. The Following stage of modeling expected consideration of the process peelings for collection cleaned club, on which expected the separate cleaned objects (for instance, potato tubers) springy element, changing their (in flat production) hard disk united between itself springy spring. Consideration this elaborated models have allowed to install the frequencies of the free fluctuations of this system and, accordingly, moments of the osculation worker organ that in significant measure defines the topology of the abrasive covering

Anharmonic vs. relaxational sound damping in glasses: II. Vitreous silica

The temperature dependence of the frequency dispersion in the sound velocity and damping of vitreous silica is reanalyzed. Thermally activated relaxation accounts for the sound attenuation observed above 10 K at sonic and ultrasonic frequencies. Its extrapolation to the hypersonic regime reveals that the anharmonic coupling to the thermal bath becomes important in Brillouin-scattering measurements. At 35 GHz and room temperature, the damping due to this anharmonicity is found to be nearly twice that produced by thermally activated relaxation. The analysis also reveals a sizeable velocity increase with temperature which is not related with sound dispersion. This suggests that silica experiences a gradual structural change that already starts well below room temperature.Comment: 13 pages with 8 figure