Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.84648
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-1.8464843732hartree
Shots2048
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
- 2048
- Precision
- 0.0220971
- Resilience
- 0
- Submitted
- 2026-03-06T23:46:57+01:00
- Wall time (s)
- 184
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 | -1.8067604108 | 10.1819 | 6 | — |
| 2 | succeeded | -0.5817822314 | 6.0638 | 3 | — |
| 3 | succeeded | -0.8763677919 | 5.53773 | 2 | — |
| 4 | succeeded | -1.3030459861 | 5.19662 | 2 | — |
| 5 | succeeded | -1.8059377101 | 5.68086 | 2 | — |
| 6 | succeeded | -1.7607547337 | 5.51652 | 2 | — |
| 7 | succeeded | -1.8264489596 | 5.72908 | 2 | — |
| 8 | succeeded | -1.8132817409 | 5.10835 | 2 | — |
| 9 | succeeded | -1.8229487475 | 5.04536 | 2 | — |
| 10 | succeeded | -1.8407955867 | 5.1971 | 2 | — |
| 11 | succeeded | -1.8181889615 | 5.34258 | 2 | — |
| 12 | succeeded | -1.8231980694 | 5.1979 | 2 | — |
| 13 | succeeded | -1.8328119943 | 5.03582 | 2 | — |
| 14 | succeeded | -1.8377582457 | 5.03607 | 2 | — |
| 15 | succeeded | -1.8464843732 | 48.5473 | 2 | — |
| 16 | succeeded | -1.8293854995 | 5.38268 | 2 | — |
| 17 | succeeded | -1.8305865613 | 5.53207 | 2 | — |
| 18 | succeeded | -1.8186084574 | 5.80521 | 2 | — |
| 19 | succeeded | -1.8428118148 | 5.40891 | 2 | — |
| 20 | succeeded | -1.8348249641 | 5.0809 | 2 | — |
| 21 | succeeded | -1.8356021857 | 6.00039 | 2 | — |
| 22 | succeeded | -1.8351425728 | 4.87018 | 2 | — |
| 23 | succeeded | -1.8342970644 | 5.13894 | 2 | — |
| 24 | succeeded | -1.8242267849 | 6.49078 | 3 | — |
| 25 | succeeded | -1.8311849200 | 5.73151 | 2 | — |