Method
- Mapper
- JW
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -0.987493
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-0.9874930821hartree
Shots256
Runtime executionsingle-job
Resilience1
MappingJW
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
- 256
- Precision
- 0.0625
- Resilience
- 1
- Submitted
- 2026-03-02T22:41:35+01:00
- Wall time (s)
- 420
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
- 4
- Physical qubits
- —
- Parameters
- —
- Depth
- 96
- Two-qubit gates
- 48
- 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
24 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 | -0.8971489754 | 15.8624 | 10 | — |
| 2 | succeeded | -0.8394831122 | 16.3578 | 11 | — |
| 3 | succeeded | -0.7672437256 | 15.1333 | 10 | — |
| 4 | succeeded | -0.8578396061 | 15.6882 | 10 | — |
| 5 | succeeded | -0.7777390118 | 56.7176 | 10 | — |
| 6 | succeeded | -0.8237779556 | 15.5481 | 10 | — |
| 7 | succeeded | -0.8346863072 | 14.7634 | 10 | — |
| 8 | succeeded | -0.8432266823 | 15.4909 | 10 | — |
| 9 | succeeded | -0.9083584071 | 14.9369 | 10 | — |
| 10 | succeeded | -0.8022903606 | 17.813 | 13 | — |
| 11 | succeeded | -0.8715774168 | 20.7322 | 15 | — |
| 12 | succeeded | -0.8902994279 | 15.2785 | 10 | — |
| 13 | succeeded | -0.8824168356 | 15.5269 | 10 | — |
| 14 | succeeded | -0.9366338305 | 15.2877 | 10 | — |
| 15 | succeeded | -0.9092045219 | 14.5926 | 10 | — |
| 16 | succeeded | -0.8630012544 | 14.7604 | 10 | — |
| 17 | succeeded | -0.7909198183 | 14.7568 | 10 | — |
| 18 | succeeded | -0.8425337588 | 15.2948 | 10 | — |
| 19 | succeeded | -0.9874930821 | 15.5395 | 10 | — |
| 20 | succeeded | -0.8933523381 | 14.7687 | 10 | — |
| 21 | succeeded | -0.8570061613 | 14.9593 | 10 | — |
| 22 | succeeded | -0.7634444389 | 18.3557 | 13 | — |
| 23 | succeeded | -0.8525116389 | 15.223 | 10 | — |
| 24 | succeeded | -0.7568608485 | 15.742 | 10 | — |