Pith Number

pith:2GOPNKFI

pith:2026:2GOPNKFIATNDFYPLAINYP4U2TQ

not attested not anchored not stored refs pending

New Exponential and Polynomial $\xi$-attractors

Andrei Linde, Renata Kallosh

New cosmological attractors with non-minimal couplings produce exponential and polynomial forms where the spectral index spans 1-2/N to 1-1/N and the tensor ratio can reach zero.

arxiv:2605.04415 v2 · 2026-05-06 · hep-th · astro-ph.CO · gr-qc · hep-ph

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\pithnumber{2GOPNKFIATNDFYPLAINYP4U2TQ}

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Record completeness

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2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

We introduce a new family of cosmological attractors with non-minimal coupling of gravity and non-canonical kinetic terms. In the Einstein frame, these models transform into a class of exponential and polynomial attractors with the spectral index ns spanning a broad range 1-2/N ≤ ns < 1-1/N, and r can decrease to zero in the limit ξ → ∞. This is sufficient to match any combination of Planck, BICEP/Keck, ACT, SPT, and DESI data. We present a supergravity implementation of these models.

C2weakest assumption

That the claimed attractor behavior and the supergravity embedding remain consistent and free of instabilities once the full higher-derivative or quantum corrections are included.

C3one line summary

New family of ξ-attractors yields ns in the interval 1-2/N ≤ ns < 1-1/N with r approaching zero as ξ grows large, plus a supergravity embedding.

Formal links

3 machine-checked theorem links

Cited by

1 paper in Pith

Unification of polynomial and exponential cosmological attractors

Receipt and verification

First computed	2026-05-22T02:04:41.661570Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d19cf6a8a804da32e1eb021b87f29a9c018ce7ad6d75c53bdf0d085182b64eae

Aliases

arxiv: 2605.04415 · arxiv_version: 2605.04415v2 · doi: 10.48550/arxiv.2605.04415 · pith_short_12: 2GOPNKFIATND · pith_short_16: 2GOPNKFIATNDFYPL · pith_short_8: 2GOPNKFI

Agent API

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/2GOPNKFIATNDFYPLAINYP4U2TQ \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: d19cf6a8a804da32e1eb021b87f29a9c018ce7ad6d75c53bdf0d085182b64eae

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f1acc9f1f4e51134c43a5c9df724f1d7c9ef2816b171df919acec6e848231c5",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "gr-qc",
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "hep-th",
    "submitted_at": "2026-05-06T02:12:13Z",
    "title_canon_sha256": "fc33017ed1b11ffe7f229aa16c954adebfe8b815b7b9dcc9d4b4699e6d96a683"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.04415",
    "kind": "arxiv",
    "version": 2
  }
}