Upload Inventory Causal Response Filtering

Upload Inventory Causal Response Filtering

• 1.
  Inventory of CausalResponse Filter Uploads 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 fi ltering. 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” in fl uence on the gravitational fi eld. The “instantaneous” local parts — the kind that are symmetric in time and do not carry cause-and-e ff ect signals — are mathematically fi ltered 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 fi ltering concrete, the authors use the Closed Time Path (CTP) formalism, a framework from quantum fi eld theory that naturally separates cause-and-e ff ect 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 fl uctuations. 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 e ff ects — to account for the observed cosmic acceleration. While still a “proof of concept,” the work o ff ers a fresh angle on one of the deepest problems in physics, showing how the very structure of cause and e ff ect 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.
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  Inventory of CausalResponse Filter Uploads 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 justi fi cation Entanglement Entropy and CRF (Speculative paper gives a possible mechanism for CRF) Axion CRF as a Go/No Go Proposition (Falsi fi able criteria for testing the role of axion-CRF theory) Singularities: Strings vs CRF Mechanisms (Speculative Strings and CRF Roles in quantum gravity)
• 3.
  Inventory of CausalResponse Filter Uploads Overview of Axions and CRF (Speculative possible axion role in the cosmological constant 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 Justi fi cation CRF (Draft Justi fi cation for CRF Assumptions) Cosmological Constant Summary (Summary and reviews of early draft) New approach to Cosmological Constant (Early Draft)