Pith Number

pith:VB2SH2EY

pith:2026:VB2SH2EYBRVX64TFEEG25K224K

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MCMit: Mid-Circuit Measurement Error Mitigation

Aleksandra \'Swierkowska, Benjamin Lienhard, Emmanouil Giortamis, Felix Gust, Innocenzo Fulginiti, Martin Schulz, Pramod Bhatotia, Sandra Stankovic, Xiaorang Guo, Yanbin Chen

MCMit reduces mid-circuit measurement errors in quantum circuits by combining faster classical feedback hardware with improved qubit discriminators.

arxiv:2604.25863 v2 · 2026-04-28 · quant-ph

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Claims

C1strongest claim

Our CNN discriminator achieves 37-73% higher accuracy for short measurement durations than the baselines, leading to up to 80% lower logical error rates in QEC. Our branch instruction reduces feedback latency by up to 70%, improving circuit depths by up to 7× over Qubic.

C2weakest assumption

That the experimentally extracted QPU readout traces used for evaluation faithfully represent the noise and timing behavior of the target hardware under real-time operation, and that the reported gains generalize beyond the specific Qubic setup and tested circuits.

C3one line summary

MCMit mitigates mid-circuit measurement errors via a new multi-control branch instruction, CNN and transformer discriminators, and software techniques, reporting up to 70% latency reduction and 80% lower logical error rates in QEC.

Receipt and verification

First computed	2026-06-23T01:12:07.686895Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a87523e8980c6b7f7265210daeab5ae2a031016d8c3d3f9b8295982691644464

Aliases

arxiv: 2604.25863 · arxiv_version: 2604.25863v2 · doi: 10.48550/arxiv.2604.25863 · pith_short_12: VB2SH2EYBRVX · pith_short_16: VB2SH2EYBRVX64TF · pith_short_8: VB2SH2EY

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/VB2SH2EYBRVX64TFEEG25K224K \
  | 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: a87523e8980c6b7f7265210daeab5ae2a031016d8c3d3f9b8295982691644464

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0214971e300fce164c9ef32bcf40a7e32c90f92fd100064d5fe4bf0e932f7277",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2026-04-28T17:00:53Z",
    "title_canon_sha256": "cefdc5c16ff99b538327e2ff048ad8c39a15475f9f67f094a3e4c55855ce21d2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.25863",
    "kind": "arxiv",
    "version": 2
  }
}