Quantum Control

Dynamic Stark Effect

The nonresonant dynamic Stark effect (NRDSE) offers the ability to manipulate quantum systems in a reversible and nonperturbative way. NRDSE contrasts with typical perturbative transitions, which involve the absorption of a photon along with a corresponding excitation of the the quantum system to a higher state. In static electric fields the shift in state energy is known is the DC Stark effect. If the field oscillates with very low frequency, the level shifts follow the field adiabatically. However, at higher frequencies and under appropriate conditions, the eigenstates do not follow the instantaneous electric field, but instead stabilize, following only the intensity envelope of the field. In a sense, a NRDSE shift is like DC field because the level shift is insensitive to frequency of the field, however, the striking advantage is that field strengths accessible are much higher with AC ultrafast pulses[1].

1: Phy. Rev. A: 73, 053403 (2006)