Partial-memory Bell-pair probe circuits on Trotterized XXZ chains: hardware raw counts, circuits, calibrations and analysis code

Raw measurement counts, submitted circuits, device calibration snapshots and analysis code from a hardware experiment on the IBM Heron processor ibm_aachen (October 2026). Experiment. Each circuit applies one Trotterized evolution of an n-qubit disordered XXZ chain, with or without a Dzyaloshinskii-Moriya term, to a probe state. The probe state entangles k probe sites of the chain with k memory qubits through Bell pairs, and the other n-k chain qubits start in |0>. After the evolution, a Bell measurement acts on each probe-site/memory pair and the idle qubits are measured in the Z basis. The recorded quantity is the frequency of the event 'all idle qubits read 0 and an odd number of Bell outcomes are singlets', which has probability zero for an ideal evolution that is symmetric under transposition. Coverage. n = 3..8 chain qubits, Trotter depths 1 and 2, memory sizes k = 1, 2 and n (28 configurations); 416 instances without and 416 with the Dzyaloshinskii-Moriya term; 888 circuits and 2,387,840 shots in four jobs (897 circuits and 2,401,472 shots with a timing probe); a repeat of the n=5, k=2 configurations on a disjoint set of physical qubits; short layout measurements on two candidate layouts. Contents. Raw counts, relayout and transpile records, submitted ISA circuits (QPY), calibration snapshots, noise-model predictions made before each job, per-circuit and per-configuration analysis tables, numerical checks with scripts and logs, SHA-256 hashes of 16 files fixed before the first job, and analysis scripts. The README gives the file layout and the command that reproduces the analysis tables from the counts.