Pith Number

pith:J6YW6PGQ

pith:2026:J6YW6PGQZBWVT3IADKXW32TBO4

not attested not anchored not stored refs pending

Squashed Pyramid Interferometer Network (SPIN): Direct Access to Chirality of Cosmological Gravitational Waves

Azadeh Maleknejad, Dmitri E. Kharzeev, Saba Shalamberidze

Pyramid interferometers isolate the net helicity of cosmological gravitational waves through non-coplanar geometry.

arxiv:2604.08471 v2 · 2026-04-09 · gr-qc · astro-ph.CO · astro-ph.HE · astro-ph.IM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{J6YW6PGQZBWVT3IADKXW32TBO4}

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Record completeness

1 Bitcoin timestamp

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

The coplanar correlation channel is blind to circular polarization, whereas the co-located non-coplanar channel is insensitive to the unpolarized background and acquires a response only in the presence of nonzero net helicity.

C2weakest assumption

That an isotropic cosmological gravitational wave background exists with sufficient amplitude and that practical 3D co-located interferometers can be built and operated with the necessary stability and calibration to exploit the geometric separation.

C3one line summary

Pyramid interferometers use non-coplanar geometry to create a channel sensitive only to net helicity in the cosmological gravitational wave background while remaining blind to the unpolarized component.

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-22T01:04:01.889951Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4fb16f3cd0c86d59ed001aaf6dea61770f3ea54eeedca693dbc3a608401a4a8e

Aliases

arxiv: 2604.08471 · arxiv_version: 2604.08471v2 · doi: 10.48550/arxiv.2604.08471 · pith_short_12: J6YW6PGQZBWV · pith_short_16: J6YW6PGQZBWVT3IA · pith_short_8: J6YW6PGQ

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/J6YW6PGQZBWVT3IADKXW32TBO4 \
  | 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: 4fb16f3cd0c86d59ed001aaf6dea61770f3ea54eeedca693dbc3a608401a4a8e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a689aa394ba435b583a3bed3c80dbc569491c924af1df2e035ae7baeace4bc03",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.HE",
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2026-04-09T17:10:08Z",
    "title_canon_sha256": "7da9dc371e6fe9a60f6b59f9113c345386123a3aa2e92021d58b05047464f032"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.08471",
    "kind": "arxiv",
    "version": 2
  }
}