Bousso-Polchinski景观中永恒暴胀的体积加权测度
Volume Weighted Measures of Eternal Inflation in the Bousso-Polchinski Landscape
摘要：
我们认为宇宙动力学与体积加权措施永恒的通货膨胀，在布索-波尔钦斯基模型的弦论景观。我们发现，这一措施预测，观察者最有可能发现自己在低能量真空与一个通量大大大于休息。此外，它允许一个令人满意的人择解释的宇宙学常数的问题，通过产生一个光滑的，近似恒定的，分布的潜在可观测值的λ。通过这种方法选择的低能真空通常是短暂的。如果我们要求人类可接受的真空至少有100亿年的寿命，那么对于合理的参数，一个典型的观察者应该期望他们的真空有大约120亿年的寿命。这个预测是依赖于模型的，但可能指向宇宙学的巧合问题的解决方案。
英文摘要：
We consider the cosmological dynamics associated with volume weighted measures of eternal inflation, in the Bousso-Polchinski model of the string theory landscape. We find that this measure predicts that observers are most likely to find themselves in low energy vacua with one flux considerably larger than the rest. Furthermore, it allows for a satisfactory anthropic explanation of the cosmological constant problem by producing a smooth, and approximately constant, distribution of potentially observable values of Lambda. The low energy vacua selected by this measure are often short lived. If we require anthropically acceptable vacua to have a minimum life-time of 10 billion years, then for reasonable parameters a typical observer should expect their vacuum to have a life-time of approximately 12 billion years. This prediction is model dependent, but may point toward a solution to the coincidence problem of cosmology.
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