see: https://www.sciencedaily.com/releases/2018/10/181009102431.htm
Quote: But in that case, the amount of "dark energy" in the universe would change over time, and the accelerated expansion of the universe may one day come to a halt. Gravity could then pull all matter back together and assemble everything at one point, similar to the time of the Big Bang.
"For a long time, we thought that such a dark energy can be well accommodated in string theory," says Timm Wrase from the Institute for Theoretical Physics of the Vienna University of Technology.
"A paradigm shift could be imminent " indeed if the Higgs particle is to heavy for the vacuum dark energy particle, ( to massive 125 GeV) but instead, it should be counted as the smallest dark matter particle, (according to Quantum FFF Theory)
Quote the press:
"In string theory, a paradigm shift could be imminent. In June, a team of string theorists published a conjecture which sounded revolutionary: String theory is said to be fundamentally incompatible with our current understanding of 'dark energy'. A new study has now found out that this conjecture seems to be incompatible with the existence of the Higgs particle."
A dark energy particle should only have oscillating energy I guess. ( propose.)
see For my proposal for a cyclic string multiverse, see perhaps:
https://bigbang-entanglement.blogspot.com/
or: http://vixra.org/author/leo_vuyk