Distributed coherent manipulation of qutrits by virtual excitation processes

Excitation of coherent propagating spin waves by pure spin currents.

Utilization of pure spin currents not accompanied by the flow of electrical charge provides unprecedented opportunities for the emerging technologies based on the electron's spin degree of freedom, such as spintronics and magnonics. It was recently shown that pure spin currents can be used to excite coherent magnetization dynamics in magnetic nanostructures. However, because of the intrinsic no...

Coherent spin control by electrical manipulation of the magnetic anisotropy.

High-spin paramagnetic manganese defects in polar piezoelectric zinc oxide exhibit a simple, almost axial anisotropy and phase coherence times of the order of a millisecond at low temperatures. The anisotropy energy is tunable using an externally applied electric field. This can be used to control electrically the phase of spin superpositions and to drive spin transitions with resonant microwav...

Coherent phonon excitation in bismuth

Ultrafast time-resolved reflectivity of a bismuth thin film evaporated on a silicon substrate is measured to investigate coherent phonons in bismuth. The reflectivity result is analyzed by a linear chirp approximation to obtain the time dependent frequencies of coherent phonons. Not only the optical modes are detected, which are generated by a combination of impulsive stimulated Raman scatterin...

Magnetization manipulation in (Ga,Mn)As by subpicosecond optical excitation

Prosodic manipulation using instants of significant excitation

This paper proposes a technique for prosodic (pitch and duration) manipulation using instants of significant excitation. Instants of significant excitation correspond to the instants of glottal closure (epochs) in voiced speech and to some random excitations like burst onset in the case of nonvoiced speech. Instants of significant excitation are computed from the average group delay of minimum ...