论文标题
低维（i）的全息浮标状态
Holographic Floquet states in low dimensions (I)
论文作者
论文摘要
我们研究了（2+1）维度规程对外部旋转电场的响应。在强耦合方案中，这种系统是在自上而下的模型中以2+1个维度相交的自上而下的模型，在淬灭的近似值中，d5-brane是ads_5 x s^5 se^5 egotry。该系统具有具有导电和绝缘体阶段的非平衡相图。外部驱动会导致由于真空极化（在绝缘体阶段）和Schwinger效应（在导电阶段）引起旋转电流。对于驱动频率的某些特定值，外部场与模型的向量介子和旋转电流产生共鸣，即使在消失的驾驶场的极限中也可以产生。这些功能与基于D3-D7 Brane模型的（3+1）维设置具有共同点，并暗示了一些有趣的普遍性。我们还计算了对光伏诱导的霍尔效应的特殊关注的电导率，该效果仅适用于大量充电载体。在浮子的附近，光霍尔系数持续在零驱动场处，发出时间逆转对称性破裂。
We study the response of a (2+1)-dimensional gauge theory to an external rotating electric field. In the strong coupling regime such system is formulated holographically in a top-down model constructed by intersecting D3- and D5-branes along 2+1 dimensions, in the quenched approximation, in which the D5-brane is a probe in the AdS_5 x S^5 geometry. The system has a non-equilibrium phase diagram with conductive and insulator phases. The external driving induces a rotating current due to vacuum polarization (in the insulator phase) and to Schwinger effect (in the conductive phase). For some particular values of the driving frequency the external field resonates with the vector mesons of the model and a rotating current can be produced even in the limit of vanishing driving field. These features are in common with the (3+1) dimensional setup based on the D3-D7 brane model and hint on some interesting universality. We also compute the conductivities paying special attention to the photovoltaic induced Hall effect, which is only present for massive charged carriers. In the vicinity of the Floquet condensate the optical Hall coefficient persists at zero driving field, signalling time reversal symmetry breaking.
