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Beijing traffic flow — QPC on IBM Heron

Route-assignment QUBO in the Volkswagen / D-Wave problem class (arXiv:1708.01625): minimize congested-road count. QPC runs three geographic zone contextures coupled at shared segments in one polycontextural IBM submission.

Plain English

What this is
Assign one route per taxi so fewer roads become overcrowded — urban mobility optimization on a multi-zone network.
What QPC computed
16-car pilot on ibm_fez · 48 active variables · 156Q Heron156 layout · 8192 shots · metric = congested roads (lower is better).
QPC result
Polycontextural decoder: 2 congested roads · one coupled 156-qubit IBM job · d94mqdsql68s73c9o2gg.
What that means
Only two road links are overloaded under the chosen routes — smoother multi-zone traffic flow from one quantum run, without classical partition loops between geographic zones.

Lane B · Industry pilot. Headline 2 congested roads uses QPC’s declared problem decoder on quantum samples from one coupled 156-qubit job — a mobility KPI, not an ICC architecture witness.

Architecture coupling proofs on raw IBM counts are Lane A: Joint Structure Challenge · two-lane overview.

IBM Fez — Heron156 (July 2026)

Layout: 156Q (3×52Q zone contextures) · morphogrammatic padding · 16 cars · 48 measured vars · 8192 shots

QPC executionCongested roads (decoder)QubitsDepthIBM job ID
QPC polycontextural (one run)2156176d94mqdsql68s73c9o2gg

Full 156-qubit co-residence — three geographic zone contextures with morphogrammatic entanglement and transjunction bridges on shared road segments. One gate-native Fez submission for multi-zone traffic structure.

QPC circuit layout (one submission)

warm-start routes → [Zone 0 contexture: local QUBO cost on zone variables] → transjunction (shared segment variables) → [Zone 1 contexture: local QUBO cost] → transjunction → [Zone 2 contexture: local QUBO cost] → transjunction closure → route-constraint XY mixer (one route per car) → measure → congested_road_count()

QPC polycontextural workflow

Zone blocks encoded as parallel contextures on the Heron register — submitted as one IBM job with auditable job IDs.

Series: Overview · Cerrado · Traffic · Allstate

Full overview → Task definition Reference paper