sixth post by Youness in the "Planck's summer"-series on CQW:
The cosmological constant $\Lambda$, according to our current physical understanding, really constant in time or has its value changed? Think about the question from a quantum field theory perspective.
With that, we wish our readers a nice summer holiday and hope that you join our blog again in October! And many thanks to you, Youness, for providing this awesome set of questions.