Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.84235
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-1.8268023409hartree
Shots1024
Runtime executionsingle-job
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_brussels
- Resource type
- ibm quantum hardware
- Processor family
- Eagle r3
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- single-job
- Shots
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2025-12-17T13:19:22+01:00
- Wall time (s)
- 129
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
22 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 | -1.8034770063 | 7.23159 | 2 | — |
| 2 | succeeded | -0.5551442361 | 6.08098 | 2 | — |
| 3 | succeeded | -0.8656276085 | 5.33642 | 1 | — |
| 4 | succeeded | -1.6223552011 | 5.99155 | 2 | — |
| 5 | succeeded | -1.6470202073 | 5.84956 | 1 | — |
| 6 | succeeded | -1.8286407923 | 5.12848 | 1 | — |
| 7 | succeeded | -1.7867532354 | 8.13133 | 4 | — |
| 8 | succeeded | -1.8012310058 | 10.5142 | 6 | — |
| 9 | succeeded | -1.8314656701 | 7.17912 | 3 | — |
| 10 | succeeded | -1.8390232501 | 4.98991 | 1 | — |
| 11 | succeeded | -1.8136535174 | 5.14249 | 1 | — |
| 12 | succeeded | -1.8373257168 | 4.90862 | 1 | — |
| 13 | succeeded | -1.8393766313 | 5.14017 | 1 | — |
| 14 | succeeded | -1.8195222527 | 5.80181 | 1 | — |
| 15 | succeeded | -1.8369051347 | 5.26071 | 1 | — |
| 16 | succeeded | -1.8377528153 | 5.53694 | 1 | — |
| 17 | succeeded | -1.8258093979 | 4.99151 | 1 | — |
| 18 | succeeded | -1.8342905479 | 5.75595 | 1 | — |
| 19 | succeeded | -1.8423467715 | 4.93555 | 1 | — |
| 20 | succeeded | -1.8115397464 | 4.74969 | 1 | — |
| 21 | succeeded | -1.8078628436 | 4.866 | 1 | — |
| 22 | succeeded | -1.8268023409 | 5.62228 | 2 | — |