The w < -1 side of Dark Energy - Univers Invisible
The w < -1 side of Dark Energy - Univers Invisible
The w < -1 side of Dark Energy - Univers Invisible
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w < -1 and gradient instabilitiesWise et al ‘04Rattazzi et al ‘05(1+w Q) Ω Qc S2GhostGradient instability!Instability rate: ω = |c s| kDangerous instabilities when ω > HGhostIt is difficult to violate the Null <strong>Energy</strong> Condition:
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