Pith Number

pith:TYCXDR4T

pith:2026:TYCXDR4TQBXHARI4RKFXF7MA6M

not attested not anchored not stored refs resolved

Ultrafast decoupling of quasiparticles and spin fluctuations in superconducting cuprates

Christian Bernhard, Hideo Kishida, Hirotake Itoh, Jure Demsar, Kenji Yonemitsu, Ryo Kato, Shinichiro Iwai, Takahiko Sasaki, Tatsuya Amano, Terukazu Nishizaki, Yohei Kawakam, Yuto Nakamura, Yuto Taniguchi

Quasiparticles in cuprate superconductors decouple from spin fluctuations within 90 femtoseconds after a quench.

arxiv:2605.14238 v1 · 2026-05-14 · cond-mat.str-el

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\usepackage{pith}
\pithnumber{TYCXDR4TQBXHARI4RKFXF7MA6M}

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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

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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 attribute this observation to an ultrafast decoupling of quasiparticles from the spin-fluctuation background, occurring on a 90 fs timescale set by the inverse optical gap.

C2weakest assumption

The mid-infrared absorption feature is assumed to arise specifically from carriers dressed by spin fluctuations, so that its scattering-rate suppression directly signals decoupling rather than other relaxation channels or spectral-weight shifts.

C3one line summary

Transient reflectivity measurements on YBCO reveal that quasiparticles decouple from spin fluctuations within 90 fs after a superconducting quench, set by the inverse optical gap.

References

72 extracted · 72 resolved · 0 Pith anchors

[1] C. Giannetti, M. Capone, D. Fausti, M. Fabrizio, F. Parmigiani, D. Mihailovic, Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium a 2016

[2] D. Basov, R. Averitt, D. Hsieh, Towards properties on demand in quantum materials. Nature. Mater. 16, 1077-1088 (2017) 2017

[3] A. Cavalleri, Photo-induced superconductivity. Comtemp. Phys. 59, 31-46 (2018) 2018

[4] Demsar, Non-equilibrium phenomena in superconductors probed by femtosecond time-domain spectroscopy 2020

[5] R. A. Kaindl, M. Woerner, T. Elsaesser, D. C. Smith, J. F. Ryan, G. A. Farnan, M. P. McCurry, D. G. Walmsley, Ultrafast Mid-Infrared Response of YBa2Cu3O7-δ. Science 287, 470-473 (2000) 2000

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-05-17T23:39:10.678070Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9e0571c793806e70451c8a8b72fd80f310a6c9ce21778cb63aaecf1638786a53

Aliases

arxiv: 2605.14238 · arxiv_version: 2605.14238v1 · doi: 10.48550/arxiv.2605.14238 · pith_short_12: TYCXDR4TQBXH · pith_short_16: TYCXDR4TQBXHARI4 · pith_short_8: TYCXDR4T

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/TYCXDR4TQBXHARI4RKFXF7MA6M \
  | 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: 9e0571c793806e70451c8a8b72fd80f310a6c9ce21778cb63aaecf1638786a53

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "20202d3bfc41961f8e40e3eafe8fb86ab06411d18bfe1d4bcfb10b0e26a65d3e",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cond-mat.str-el",
    "submitted_at": "2026-05-14T01:10:07Z",
    "title_canon_sha256": "c336049978db3aadf0faa3629d06b2211b2e558153c1de6931a789a15bb59f71"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.14238",
    "kind": "arxiv",
    "version": 1
  }
}