Why does the enormous calculated vacuum energy not curve the universe enormously?
The vacuum-energy problem asks why the gravitational effect of vacuum contributions is so small. OPH's conditional Einstein reconstruction highlights a precise mathematical fact: a stress contribution proportional to the metric has zero contraction with a null direction. A balance read only along light rays therefore cannot determine that term. This explains why a cosmological constant remains as an undetermined metric contribution in that reconstruction. It does not prove that vacuum energy cannot gravitate; in the full Einstein equation a constant vacuum contribution can be absorbed into the cosmological constant. OPH's separate horizon-capacity proposal seeks to fix the effective value. A complete solution must also explain the physical normalization and stability under matter contributions, rather than transfer a blind spot of one probe into a universal absence of gravity.
See also Why is the cosmological constant so small?, What is dark energy?
Sources: Observer spacetime and the conditional Einstein reconstruction
Also in Chapter 29: Why 1/137, and Why Is There a Limit to What the Universe Can Remember?, Chapter 33: Why Was Every Open Problem the Same Problem?.
This answer comes from OPH, Observer Patch Holography. OPH is a rigorous, consistent and complete description of the unified, self-creating computational Universe we inhabit. Its consistency is machine-checked: the fixed point at its core is constructed explicitly, and a theory with a model contains no contradiction.
To understand OPH and check every step yourself, start with the free book Reverse Engineering Reality. It builds the theory from the ground up, and the OPH Notebook answers your questions while you read.
read the free bookask the notebookor ask sage:read chapter 25: Why Does Gravity Look Like Geometry?watch a universe make its own particles