论文标题
脾气好的宇宙学常数：f $^\ flat $中
The Well-Tempered Cosmological Constant: Fugue in B$^\flat$
论文作者
论文摘要
量子场的零点波动应在任何时空中产生较大的宇宙学恒定能密度。那么，除了精细调整而没有开心空间以外，我们如何才能拥有其他任何东西呢？良好的回火 - 使用田间方程内的堕落性对宇宙常数的动态取消 - 可以用较低的能量状态替换大型宇宙常数。在这里，我们提供了一种明确的机制，以获得Minkowski溶液，用零代替宇宙常数，并通过真空相变的吸引子的性质和持久性测试。我们得出了一般条件，即Horndeski标量敏感性重力必须拥有并在功能的赋格中进化，以使其无所作为并使宇宙变得平坦。
Zero point fluctuations of quantum fields should generate a large cosmological constant energy density in any spacetime. How then can we have anything other than de Sitter space without fine tuning? Well tempering -- dynamical cancellation of the cosmological constant using degeneracy within the field equations -- can replace a large cosmological constant with a much lower energy state. Here we give an explicit mechanism to obtain a Minkowski solution, replacing the cosmological constant with zero, and testing its attractor nature and persistence through a vacuum phase transition. We derive the general conditions that Horndeski scalar-tensor gravity must possess, and evolve in a fugue of functions, to deliver nothing and make the universe be flat.
