论文标题
原子腔系统中的动力密度波顺序
Dynamical density wave order in an atom-cavity system
论文作者
论文摘要
我们从理论上和实验上探索了驱动的耗散原子腔系统中动态密度波顺序的出现。将玻色子凝结物放置在高技巧的光学谐振器中，并通过光学常驻波侧向抽水。选择泵的强度以诱导通过强烈的腔内光场稳定的原子的固定超级棋盘板密度波阶。从理论上讲，当泵以频率$ω__{d} $以足够的强度调制时，即将出现动态密度波顺序的系统共振频率$ω_ {>} $，它会在两个频率$ω______________________________________________{该顺序与特征动量光谱有关，除了在现场相互作用和加热中抑制的振荡动力学之外，还发现了实验中的动量光谱，而计算中未包括。与该阶相关的振荡密度光栅抑制了泵引起的光散射到腔中。在光驱动的电子物质中可能可以想象类似的机制。
We theoretically and experimentally explore the emergence of a dynamical density wave order in a driven dissipative atom-cavity system. A Bose-Einstein condensate is placed inside a high finesse optical resonator and pumped sideways by an optical standing wave. The pump strength is chosen to induce a stationary superradiant checkerboard density wave order of the atoms stabilized by a strong intracavity light field. We show theoretically that, when the pump is modulated with sufficient strength at a frequency $ω_{d}$ close to a systemic resonance frequency $ω_{>}$, a dynamical density wave order emerges, which oscillates at the two frequencies $ω_{>}$ and $ω_{<} = ω_{d} - ω_{>}$. This order is associated with a characteristic momentum spectrum, also found in experiments in addition to remnants of the oscillatory dynamics presumably damped by on-site interaction and heating, not included in the calculations. The oscillating density grating, associated with this order, suppresses pump-induced light scattering into the cavity. Similar mechanisms might be conceivable in light-driven electronic matter.
