Utilizing an adiabatic approximation method, a bipartite qudit-oscillator Hamiltonian is studied for low-spin values in both strong and ultrastrong coupling regimes. The quasiprobability densities on the hybrid factorized phase space are introduced. Integrating over sector of composite space, distributions its complementary subsystem recovered. In regime, qudit entropy displays pattern quasiper...

The long coherence time of a single nitrogen vacancy (NV) center spin in diamond is crucial advantage for implementing quantum information processing. However, the realization strong coupling between NV spins challenging. Here, we propose method to greatly enhance interaction two which are only weakly coupled an electromechanical cavity. Owing presence critical point linearized subsystem, and h...

We investigate the existence of the pure spin ratchet effect in a dissipative quasi-one-dimensional system with Rashba spin-orbit interaction. The system is additionally placed into a transverse uniform stationary in-plane magnetic field. It is shown that the effect exists at low temperatures and pure spin currents can be generated by applying an unbiased ac driving to the system. An analytical...