Spin nutation induced by atomic motion in a magnetic lattice

Abstract

An atom moving in a spatially periodic field experiences a temporary periodic perturbation and undergoes a resonance transition between atomic internal states when the transition frequency is equal to the atomic velocity divided by the field period. We demonstrated that spin nutation was induced by this resonant transition in a polarized rubidium (Rb) atomic beam passing through a magnetic lattice. The lattice was produced by current flowing through an array of parallel wires crossing the beam. This array structure, reminiscent of a multiwire chamber for particle detection, allowed the Rb beam to pass through the lattice at a variety of incident angles. The dephasing of spin nutation was reduced by varying the incident angle.

Quantum discord between two moving two-level atoms

“…Besides, with the development of the laser-cooling technique, the slow-moving atoms can be obtained easily. Therefore, some interesting researches on atomic motion have been carried out [29][30][31][32][33][34]. These researches have shown that the atomic motion and the field-mode structure can bring about the nonlinear transient effects of atomic population [29], control the entanglement and realize the quantum gate operation [30], influence quantum fluctuations of a single atom in a weakly driven cavity [31], and suppress the Rabi oscillations of an atom irradiated by a laser in resonance with the atomic transition [32].…”

Magnetic resonance of rubidium atoms passing through a multi-layered transmission magnetic grating

“…As an attempt to increase N, MIR was tested with an Rb atomic beam travelling between wire currents that generated a periodic magnetic field for N = 28 [17] and 10 [18]. The relative linewidths were observed as 4% and 10%, respectively, as expected.…”

Atomic spin resonance in a rubidium beam obliquely incident to a transmission magnetic grating

“…A schematic diagram of the experimental setup is shown in figure 1. The setup was the same as the one used in a previous experiment [11], with the exception of the use of a transmission grating instead of a magnetic lattice made of current-carrying wires. Specifically, a Rb atomic beam emerged from an oven heated to nearly 200 °C.…”

“…Sharp resonance lines, limited by the transit time, were obtained in an atomic beam experiment [10]. Coherent manipulation of the atomic spin through motion-induced resonance has also been demonstrated [11].…”