Scale ladder · Eagle 65Q / 128Q · Heron r2 156Q · raw counts

Three rungs,
one brickwork family

Morphogrammatic brickwork and a shallow Bell witness, stepped from IBM Eagle to full IBM Heron r2 width. Public job IDs. Architecture and witness numbers on raw counts.

65 → 128 → 156
Qubit rungs
4,096 / 4,096
Kingston unique
77 / 78
Kingston pairs F > 0.5
0.8859
Kingston avg F raw

Plain English

What this page is
A scale ladder for the same QPC brickwork and Bell-witness family: 65Q and 128Q on IBM Eagle ibm_torino, then 156Q on IBM Heron r2 ibm_kingston.
What QPC ran
Two circuit types, kept separate. Deep morphogrammatic brickwork for reach. A short Bell prep (H + CX) for the entanglement witness.
Headline on Kingston
4,096 unique outcomes from 4,096 shots · 77 of 78 pairs with raw F > 0.5 · average raw F 0.8859.

The three rungs

Same family. Wider chip. Deeper brickwork on the top rung. Bell stays shallow on every rung that carries it.

65Q Eagle 128Q Eagle 156Q Heron r2
Backend ibm_torino ibm_torino ibm_kingston
Date 9 February 2026 21 February 2026 5 September 2026
Brickwork layers 20 20 28
Brickwork shots 2,048 2,048 4,096
Unique (raw) 2,048 / 2,048 2,048 / 2,048 4,096 / 4,096
Compiled size / depth see 65Q page 16,617 / 514 33,894 / 1,436
Bell pairs F > 0.5 59 / 64 77 / 78
Average Bell F (raw) 0.8148 0.8859
Brickwork job d64uqfao8gvs73f5246g d6d0bffg4t5c7386309g dae510dnj4cs73aemir0
Bell job d6d0gk154hss73b94gc0 dae512dnj4cs73aemit0

The 65Q brickwork record sits on IBM Quantum summary.

Rung 2 · 128Q Eagle

21 February 2026. IBM Eagle ibm_torino · 133 qubits. Same morphogrammatic pattern as the 65Q run, widened to 128.

Brickwork

128
Qubits
20
Layers
6,774
Pre-transpile
16,617
Post-transpile
514
Depth
2,048
Shots
7.22s
Execution
2,048 / 2,048
Unique raw

Job d6d0bffg4t5c7386309g.

Bell witness (shallow)

64 disjoint neighbor pairs. F > 0.5 means the pair is entangled. Formula: F = (1 + ⟨XX⟩ − ⟨YY⟩ + ⟨ZZ⟩) / 4.

59 / 64
F > 0.5
92.2%
Share
0.8148
Average F
2,048
Shots

Job d6d0gk154hss73b94gc0.

Rung 3 · 156Q Kingston

5 September 2026. IBM Heron r2 ibm_kingston · 156 qubits. Expectation locked before submit. Two separate jobs. Resilience on submit and fetch. Numbers on raw counts.

Brickwork · BL-A PASS

28 logical layers. 4,096 shots. Compiled circuit larger than the Eagle 128Q rung.

156
Qubits
28
Layers
11,374
Pre-transpile
33,894
Post-transpile
1,436
Depth
4,096
Shots
4,096 / 4,096
Unique raw

Job dae510dnj4cs73aemir0. Locked bars BL-A1 and BL-A2: job returned, uniqueness recorded on raw counts.

Bell witness (shallow) · BL-B PASS

78 disjoint neighbor pairs. Same short H + CX prep as the 128Q witness. Locked bar: at least 55 of 78 pairs with raw F > 0.5.

77 / 78
F > 0.5
98.7%
Share
0.8859
Average F raw
4,096
Shots

Job dae512dnj4cs73aemit0. One pair under 0.5: q34–q35, raw F 0.4922. Measured average 0.8859 sits above the Eagle 128Q average 0.8148.

What the ladder shows

Decision rankings and architecture gaps sit on the Real-World Desks and Highlights.