标题： 遗迹引力波在再加热之后产生 显示英文标题

标题： Relic gravitational waves produced after preheating

摘要： 我们证明，在相干振荡场的共振衰变产生的经典波相互作用中，引力辐射可以非常有效地产生。 对于某些混沌膨胀的简单模型，其中暴胀场与另一个标量场相互作用，我们发现今天每八度频程的引力波能量密度与宇宙临界密度的比值可能高达10^{-12}，在最大波长约为10^{5} cm时。 在纯$\lambda\phi^4$模型中，由该机制产生的今天最大引力波波长约为10^6 cm，接近LIGO和TIGA操作频率的上限。 然而，该模型中波的能量密度很可能远低于LIGO或TIGA在这些频率下的灵敏度。 我们讨论了在其他膨胀模型中，经典波的相互作用可能导致更强的引力辐射背景的可能性。 显示英文摘要

摘要： We show that gravitational radiation is produced quite efficiently in interactions of classical waves created by resonant decay of a coherently oscillating field. For simple models of chaotic inflation in which the inflaton interacts with another scalar field, we find that today's ratio of energy density in gravitational waves per octave to the critical density of the universe can be as large as 10^{-12} at the maximal wavelength of order 10^{5} cm. In the pure $\lambda\phi^4$ model, the maximal today's wavelength of gravitational waves produced by this mechanism is of order 10^6 cm, close to the upper bound of operational LIGO and TIGA frequencies. The energy density of waves in this model, though, is likely to be well below the sensitivity of LIGO or TIGA at such frequencies. We discuss possibility that in other inflationary models interaction of classical waves can lead to an even stronger gravitational radiation background.