Inventory: Uploads on Causal Response Filtering

Contains a brief description of Causal Response Filtering (CRF) and a list of the slideshare CRF paper and presentation uploads

1. Inventory of Causal Response Filter (CRF) Uploads
Overview of CRF
Physicists have long puzzled over the “cosmological constant problem” — why
the vacuum of space, according to quantum theory, should contain an
enormous amount of energy, yet astronomical observations show it is almost
empty. In theory, this vacuum energy should act like a powerful form of gravity,
causing the universe to expand at an absurdly rapid rate. In reality, the
measured value is tiny, more than a hundred orders of magnitude smaller than
naïve predictions. This gap between theory and observation is one of the
biggest mysteries in modern physics.
The paper explores a new mathematical approach based on an idea called
causal-response filtering. In essence, the proposal is to treat the equations of
general relativity so that they only respond to the parts of the vacuum’s energy
that can have a causal, “after-the-fact” influence on the gravitational field. The
“instantaneous” local parts — the kind that are symmetric in time and do not
carry cause-and-effect signals — are mathematically filtered out. This leaves
only those energy contributions that come from processes with a clear arrow of
time, such as radiation emitted after a disturbance.
To make this filtering concrete, the authors use the Closed Time Path (CTP)
formalism, a framework from quantum field theory that naturally separates
cause-and-effect parts of physical processes from time-symmetric parts. In this
framework, the causal terms act like “retarded” signals — they only respond
after a source changes — while the time-symmetric pieces include large vacuum
fluctuations. By discarding the latter in the gravitational equations, the model
sidesteps the huge contributions that normally blow up the cosmological
constant.
If correct, this approach could explain why the vacuum doesn’t weigh down the
universe the way simple theory predicts, while still allowing a small residue —
perhaps linked to subtle time-asymmetric effects — to account for the observed
cosmic acceleration. While still a “proof of concept,” the work offers a fresh
angle on one of the deepest problems in physics, showing how the very
structure of cause and effect might help the universe keep its balance.
The uploads contain the main paper/presentation, multiple drafts, and
several speculative papers. The drafts are for historical reasons and
the speculation is for future applications.

2. Presentations
Causal Response Filter
(High Level Overview)
New Approach to Cosmological Constant
(Early Draft)
Papers:
CRF Feedbacks from Multiple AI Reviewers
(informative positive reviews for CRF)
An Integrated CRF Framework
(Latest revised CRF paper includes physical justification
Entanglement Entropy and CRF
(Speculative paper gives a possible mechanism for CRF)
Axion CRF as a Go/No Go Proposition
(Falsifiable criteria for testing the role of axion-CRF theory)
Singularities: Strings vs CRF Mechanisms
(Speculative Strings and CRF Roles in quantum gravity)

Overview of Axions and CRF
(Speculative possible axion role in the cosmological constant)

3. CRF and Hubble Tension
(Speculative paper on as possible CRF application)
Combining Axions and CRF
(Draft on a possible axion role in the cosmological constant)

Physical Justification CRF
(Draft Justification for CRF Assumptions)
Cosmological Constant Summary
(Summary and reviews of early draft)

New approach to Cosmological Constant
(Early Draft)