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Cerrado carbon-credit portfolio — QPC on IBM Heron

Brazilian Cerrado ESG portfolio optimization (Ribeiro et al., arXiv:2602.09047): select k = 28 municipalities from n = 88 in Goiás, maximizing carbon, biodiversity, and social impact with spatial synergies. QPC encodes all three objectives as parallel contextures in one IBM submission.

Plain English

What this is: Pick 28 municipalities in Brazil’s Cerrado that best balance carbon, biodiversity, and social impact — using open data from the published Cerrado study.
What QPC computed: Full n=88 instance on IBM Fez · 156Q Heron156 layout (3×52Q contextures) · carbon / biodiversity / social contextures with transjunction bridges · auditable job IDs.
QPC result: Polycontextural decoder portfolio score 44.419 on the full Ribeiro instance · one coupled IBM job · d94mmrnu62ks73967jh0.
What that means: A concrete selection of 28 municipalities that jointly delivers carbon, biodiversity, and social value — the published ESG planning metric, from one polycontextural quantum run on production Heron.

Lane B · Industry pilot. Headline score 44.419 uses QPC’s declared polycontextural decoder on quantum samples from one coupled Heron job — a customer-facing ESG portfolio metric, not an ICC architecture witness.

Raw coupling proofs (ICC vs separable and intracontext controls, unprocessed counts) are Lane A: Joint Structure Challenge · MCGS · two-lane overview.

IBM Fez — Heron156 (July 2026)

Two complementary Fez passes: full Ribeiro n=88 on a shared register, and 156Q Heron width with morphogrammatic padding across three balanced contextures.

A — Full Ribeiro instance (n=88, k=28)

Backend: ibm_fez · 4096 shots · QPC noise reducer

QPC execution	Decoder score	IBM job ID
QPC polycontextural (one run)	44.419	`d94mmrnu62ks73967jh0`

Carbon, biodiversity, and social contextures coupled by transjunction ring bridges — one submission encoding the full multi-objective ESG structure on IBM Heron.

B — Heron156 flagship (156Q · 3×52Q contextures)

Layout: 3 balanced contextures · aligned transjunctions · morph depth 5 · n=28, k=7 · one IBM job

Metric	Value
Total qubits	156
Contextures	3 (carbon / biodiversity / social)
Transjunction coupling sites	56
QPC decoder score	5.288
IBM job ID	`d94lljsql68s73c9mq50`

Full Heron co-residence with morphogrammatic padding per contexture — hardware-scale polycontextural execution on production IBM gate hardware.

QPC polycontextural workflow

Multi-objective ESG structure encoded as parallel contextures on the Heron register — submitted as one gate-native IBM job with auditable job IDs.

Series: Overview · Cerrado · Traffic · Allstate

Full overview →

Data: github.com/hgribeirogeo/qaoa-carbon-cerrado

Cerrado carbon-credit portfolio — QPC on IBM Heron

IBM Fez — Heron156 (July 2026)

A — Full Ribeiro instance (n=88, k=28)

B — Heron156 flagship (156Q · 3×52Q contextures)

QPC polycontextural workflow

QPC circuit layout (one submission)

Architecture program