Pith Number

pith:FJ5W6G72

pith:2025:FJ5W6G72UOXPY4DYIDB6LQEEKD

not attested not anchored not stored refs resolved

DC-powered broadband quantum-limited microwave amplifier

A. H. Esmaeili, A. Paquette, A. Rogalle, B. Monge, F. Cyrenne-Bergeron, M. Arabmohammadi, M. Hofheinz, N. Bourlet, N. Nehra, Y. Lapointe

A voltage-biased SQUID amplifier provides 13 dB gain over 3.5 GHz while staying within 0.2 photons of the quantum limit using only DC power.

arxiv:2512.19902 v2 · 2025-12-22 · quant-ph · cond-mat.mes-hall

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\usepackage{pith}
\pithnumber{FJ5W6G72UOXPY4DYIDB6LQEEKD}

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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

Here, we demonstrate the first DC-powered broadband amplifier operating within 0.2 photons of the quantum limit.

C2weakest assumption

The impedance engineering and semiclassical model fully capture device behavior without significant unmodeled quantum effects, fabrication variations, or losses that would degrade the claimed noise performance.

C3one line summary

A voltage-biased SQUID-based ICTA delivers 13 dB average gain across 3.5 GHz bandwidth while operating within 0.2 photons of the quantum limit.

References

24 extracted · 24 resolved · 0 Pith anchors

[1] D. Sank, Z. Chen, M. Khezri, J. Kelly, R. Barends, B. Campbell, Y. Chen, B. Chiaro, A. Dunsworth, A. Fowler, E. Jeffrey, E. Lucero, A. Megrant, J. Mu- tus, M. Neeley, C. Neill, P. J. J. O’Malley, C. Q 2016

[2] M. Khezri, A. Opremcak, Z. Chen, K. C. Miao, M. McEwen, A. Bengtsson, T. White, O. Naaman, D. Sank, A. N. Korotkov, Y. Chen, and V. Smelyanskiy, Phys. Rev. Appl.20, 054008 (2023) 2023

[3] M. A. Castellanos-Beltran, K. D. Irwin, G. C. Hilton, L. R. Vale, and K. W. Lehnert, Nature Physics4, 929 (2008) 2008

[4] Bergealet al., Nature465, 64 (2010) 2010

[5] J. Y. Mutus, T. C. White, R. Barends, Y. Chen, Z. Chen, B. Chiaro, A. Dunsworth, E. Jeffrey, J. Kelly, A. Megrant, C. Neill, P. J. J. O’Malley, P. Roushan, D. Sank, A. Vainsencher, J. Wenner, K. M. Su 2014

Formal links

2 machine-checked theorem links

Receipt and verification

First computed	2026-06-08T01:05:05.680182Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2a7b6f1bfaa3aefc707840c3e5c08450ddb91780f0948f6d5c130e1bb81f9fff

Aliases

arxiv: 2512.19902 · arxiv_version: 2512.19902v2 · doi: 10.48550/arxiv.2512.19902 · pith_short_12: FJ5W6G72UOXP · pith_short_16: FJ5W6G72UOXPY4DY · pith_short_8: FJ5W6G72

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/FJ5W6G72UOXPY4DYIDB6LQEEKD \
  | 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: 2a7b6f1bfaa3aefc707840c3e5c08450ddb91780f0948f6d5c130e1bb81f9fff

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "67b5847c96c8a6f85203b4cfcd7beeceedd41ff29b963e0b1a73baeeeb326c95",
    "cross_cats_sorted": [
      "cond-mat.mes-hall"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2025-12-22T22:07:08Z",
    "title_canon_sha256": "bb5fa9c6962826af3386375b45b4f3179803af346a06e9c9ec173ab4cd5b57a0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2512.19902",
    "kind": "arxiv",
    "version": 2
  }
}