Quantum system driven by periodic external field

Manabu Machida, Keiji Saito, Seiji Miyashita

We study the quantum localization of a GOE random matrix model driven by a periodic external field. After the diffusion is suppressed, the average energy oscillates around some finite value Esat. We study how Esat depends on the frequency of the external field. In order to investigate this phenomenon, we also study the frequency dependence of the relevant number of Floquet states Nmin, and discuss its dependence in the view of the Anderson localization in the region where the frequency is not large.

Luca D’Alessio, Anatoli Polkovnikov

Xiang-Ping Liao, Mao-Fa Fang, Xiaomei Chen +2 more

We study quantum entanglement between two spatially separated atoms driven by an external coherent laser field in the dissipative process of spontaneous emission. It is shown that the entanglement exhibits long-time oscillatory behaviour with remarkable entanglement in the peaks and the peak and period are related to the Rabi frequencies of the external coherent laser field.

Malay Bandyopadhyay, Sushanta Dattagupta

Giulio Casati, Italo Guarneri

Michael Rudolf Vogl, Pontus Laurell, Aaron Barr +1 more

New techniques for analyzing the response of quantum many-body systems to time-varying, periodic external fields extend current methods to the low-frequency regime, a critical step for predicting emergent novel phases.