Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.85295
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-1.8296315630hartree
Shots1024
Runtime executionsession
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
- session
- Shots
- 1024
- Precision
- 0.03125
- Resilience
- 0
- Submitted
- 2025-11-25T13:43:55+01:00
- Wall time (s)
- 102
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 | -1.8064449743 | 7.08241 | 1 | — |
| 2 | succeeded | -0.5757747501 | 5.46488 | 1 | — |
| 3 | succeeded | -0.8618813329 | 5.19318 | 1 | — |
| 4 | succeeded | -1.5796784759 | 5.51772 | 1 | — |
| 5 | succeeded | -1.6446874566 | 4.82692 | 1 | — |
| 6 | succeeded | -1.8395262380 | 5.11642 | 1 | — |
| 7 | succeeded | -1.7908528923 | 6.7499 | 3 | — |
| 8 | succeeded | -1.8041274288 | 5.18351 | 1 | — |
| 9 | succeeded | -1.8362699174 | 4.9773 | 1 | — |
| 10 | succeeded | -1.8333062936 | 5.00881 | 1 | — |
| 11 | succeeded | -1.8106942380 | 5.0696 | 1 | — |
| 12 | succeeded | -1.8297746533 | 5.2467 | 1 | — |
| 13 | succeeded | -1.8366254708 | 6.3083 | 1 | — |
| 14 | succeeded | -1.8315372152 | 5.3467 | 1 | — |
| 15 | succeeded | -1.8283611283 | 5.02526 | 1 | — |
| 16 | succeeded | -1.8362027166 | 4.81375 | 1 | — |
| 17 | succeeded | -1.8198084332 | 5.07731 | 1 | — |
| 18 | succeeded | -1.8529503812 | 5.15341 | 1 | — |
| 19 | succeeded | -1.8296315630 | 5.36141 | 1 | — |