We show that a magnetic dipole in a shear flow under the action of an oscillating magnetic field displays stochastic resonance in the linear response regime. To this end, we compute the classical quantifiers of stochastic resonance, i.e., the signal to noise ratio, the escape time distribution, and the mean first passage time. We also discuss the limitations and role of the linear response theo...

We measured ferromagnetic resonance of a single submicron ferromagnetic strip, embedded in an on-chip microwave transmission line device. The method used is based on detection of the oscillating magnetic flux due to the magnetization dynamics, with an inductive pickup loop. The dependence of the resonance frequency on applied static magnetic field agrees very well with the Kittel formula, demon...

We study the dynamics of a spin coupled to an oscillating magnetic field, in the presence of decoherence and dissipation. In this context we solve the master equation for the Landau-Zener problem, both in the unitary and in the irreversible case. We show that a single spin can be " magnetized " in the direction parallel to the oscillating bias. When decay from upper to lower level is taken into...

The singularity of the exact electromagnetic fields is derived to include the ‘source terms’ for harmonically oscillating electric (and magnetic) dipoles, so that the fields will be consistent with the full Maxwell equations with a source. It is shown explicitly, as somewhat expected, that the same δ-function terms for the case of static dipole fields will have to be included in the dynamic cas...

The behavior of the photocurrent in GaAs/AlAs p-i-n-heterostructures is studied a magnetic field parallel to heterolayers wavelength range from 395 650 nm. A strong dependence non-oscillating component on radiation associated with suppression diffusion current by was found. It shown that oscillating does not depend light and determined transfer electrons through dimensional quantization level t...

eunsteady slip-flow of second grade non-newtonian electrically conducting fluid over an oscillating sheet has been considered and solved numerically. a second-order slip velocity model is used to predict the flow characteristic over the wall. with the assumption of infinite length in the x-direction, the velocity of the fluid can be assumed as a function of y and t, hence, with proper change va...

A microscopic Ioffe-Pritchard trap is formed using a straight, current-carrying wire, together with suitable auxiliary magnetic fields. By measuring the distribution of cold rubidium atoms held in this trap, we detect a weak magnetic field component ∆B z parallel to the wire. This field is proportional to the current in the wire and is approximately periodic along the wire with period λ = 230 µ...

The effect of a horizontal magnetic field on the oscillatory instability convection rolls in finite liquid-metal layer is investigated. flow measurements reveal that first developing oscillations are two-dimensional nature. In particular, mutual increase and decrease size adjacent observed where periodicity ``breathing'' can be related to standing inertial waves. With gradual reduction magnetic...

We study the formation and dynamics of dipolar rings composed by microscopic ferromagnetic ellipsoids, which self-assemble in water by switching the direction of the applied field. We show how to manipulate these fragile structures and control their shape via application of external static and oscillating magnetic fields. We introduce a theoretical framework which describes the ring deformation...

Oscillating magnetic fields and field gradients can be used to implement single-qubit rotations and entangling multiqubit quantum gates for trapped-ion quantum information processing (QIP). With fields generated by currents in microfabricated surface-electrode traps, it should be possible to achieve gate speeds that are comparable to those of optically induced gates for realistic distances betw...