MICRO-MOTION EFFECT OF A TRAPPED ULTRA-COLD ION IN A STANDING-WAVE LASER

方卯发, Xiang Liu

Kade Bishop, Scott Bergeson

Markus Lindberg

Jiang Yurong, Feng Mang, Gao Ke-kin +1 more

In the absence of the requirements of the Lamb-Dicke limit and rotating wave approximation, we semi-classically investigate the dynamics of a trapped ultra-cold ion in the standing-wave laser, with the consideration of the time-dependent potential and pseudo-potential of the Paul trap. The specific calculations show that the larger the Lamb-Dicke parameter η and the Rabi frequency Ω, the greater the difference between the dynamics in the time-dependent potential and the pseudo-potential.

Lukas Fladung

Mao-Fa Fang, LIU XIANG, 湖南师范大学理学院物理系,长沙410081

We have investigated the quantum entropy and entanglement of the internal and external degrees of freedom of a trapped ion in a standing wave laser by transforming the Hamiltonian to that in the Jaynes-Cummings system for the bare basis of the trapped ion under the Lamb-Dicke limit. Under the off-resonant condition, we have found the periodic entanglement between the internal and external degrees of freedom of a trapped ion.