Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.84747
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.8474718857hartree
Shots2048
Runtime executionsingle-job
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_aachen
- Resource type
- ibm quantum hardware
- Processor family
- Heron r2
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- single-job
- Shots
- 2048
- Precision
- 0.0220971
- Resilience
- 0
- Submitted
- 2026-03-09T22:10:15+01:00
- Wall time (s)
- 162
Molecular system
- Charge
- 0
- Multiplicity
- 1
- Basis
- STO-3G
- Active space
- 2e,2o
- Active electrons
- 2
- Spatial orbitals
- 2
- Geometry units
- angstrom
Circuit
- Logical qubits
- 1
- Physical qubits
- —
- Parameters
- —
- Depth
- 1
- Two-qubit gates
- 0
- Hamiltonian terms
- —
Dataset publication
Associated articles
- Accuracy-Cost Trade-offs for Reference VQE Calculations of H2 on IBM Quantum Hardware submitted to Quantum Science and Technology
- Accuracy-Cost Trade-offs for Reference VQE Calculations of H2 on IBM Quantum Hardware DOI 10.48550/arXiv.2604.11478 arXiv 2604.11478 published preprint
Compute access
- Fraunhofer Quantum Now and EQeS · IBM Quantum · allocation: Fraunhofer Quantum Now
Optimization trajectory
25 recorded objective evaluations. Charts use cumulative time so convergence cost remains comparable across calculations.
| Attempt | Outcome | Energy (Ha) | Elapsed (s) | Quantum (s) | Parameters |
|---|---|---|---|---|---|
| 1 | succeeded | -1.8228013130 | 6.08535 | 2 | — |
| 2 | succeeded | -0.5670139362 | 5.92583 | 2 | — |
| 3 | succeeded | -0.8707505506 | 6.07894 | 2 | — |
| 4 | succeeded | -1.3275983803 | 5.9701 | 2 | — |
| 5 | succeeded | -1.7968939740 | 7.0408 | 3 | — |
| 6 | succeeded | -1.7770416994 | 6.79432 | 3 | — |
| 7 | succeeded | -1.8369755938 | 6.90162 | 3 | — |
| 8 | succeeded | -1.8136708947 | 6.3404 | 3 | — |
| 9 | succeeded | -1.8417429824 | 6.38026 | 3 | — |
| 10 | succeeded | -1.8229422311 | 6.25504 | 3 | — |
| 11 | succeeded | -1.8445722046 | 6.44236 | 3 | — |
| 12 | succeeded | -1.8440779052 | 6.97096 | 3 | — |
| 13 | succeeded | -1.8317453341 | 6.6275 | 3 | — |
| 14 | succeeded | -1.8453851986 | 6.40971 | 3 | — |
| 15 | succeeded | -1.8474718857 | 6.11843 | 3 | — |
| 16 | succeeded | -1.8415706361 | 7.14924 | 3 | — |
| 17 | succeeded | -1.8424530031 | 7.23735 | 3 | — |
| 18 | succeeded | -1.8407554698 | 6.27289 | 2 | — |
| 19 | succeeded | -1.8240793503 | 5.81543 | 2 | — |
| 20 | succeeded | -1.8435846920 | 6.65335 | 3 | — |
| 21 | succeeded | -1.8381419691 | 6.65916 | 3 | — |
| 22 | succeeded | -1.8297692229 | 6.19225 | 2 | — |
| 23 | succeeded | -1.8269421729 | 6.06666 | 2 | — |
| 24 | succeeded | -1.8437245240 | 5.77155 | 2 | — |
| 25 | succeeded | -1.8407923285 | 6.2462 | 2 | — |