Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 25
- Best energy (Ha)
- -1.78886
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.7888626621hartree
Shots1024
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
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2025-11-20T17:22:28+01:00
- Wall time (s)
- 125
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
19 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 | -1.7610842893 | 6.37805 | 2 | — |
| 2 | succeeded | -0.6352013122 | 6.65461 | 2 | — |
| 3 | succeeded | -0.8611702260 | 7.51217 | 2 | — |
| 4 | succeeded | -1.5858225308 | 6.08848 | 2 | — |
| 5 | succeeded | -1.6000335340 | 6.22914 | 2 | — |
| 6 | succeeded | -1.7808801557 | 6.71026 | 2 | — |
| 7 | succeeded | -1.7125648946 | 6.46849 | 2 | — |
| 8 | succeeded | -1.7307195678 | 6.39579 | 2 | — |
| 9 | succeeded | -1.7880865266 | 6.42481 | 2 | — |
| 10 | succeeded | -1.7487940071 | 6.55514 | 2 | — |
| 11 | succeeded | -1.7656847620 | 6.90185 | 2 | — |
| 12 | succeeded | -1.7730298788 | 6.29282 | 2 | — |
| 13 | succeeded | -1.7616566502 | 6.02121 | 2 | — |
| 14 | succeeded | -1.7766374086 | 6.84691 | 3 | — |
| 15 | succeeded | -1.7659665981 | 6.89931 | 2 | — |
| 16 | succeeded | -1.7386196682 | 6.13306 | 2 | — |
| 17 | succeeded | -1.7507755487 | 6.33594 | 2 | — |
| 18 | succeeded | -1.7630723474 | 6.30054 | 2 | — |
| 19 | succeeded | -1.7888626621 | 6.38384 | 2 | — |