Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.83487
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-1.8234387366hartree
Shots4096
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
- 4096
- Precision
- 0.015625
- Resilience
- 0
- Submitted
- 2026-02-12T21:19:37+01:00
- Wall time (s)
- 137
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 | -1.8097646945 | 10.2453 | 6 | — |
| 2 | succeeded | -0.5571572059 | 6.94839 | 3 | — |
| 3 | succeeded | -0.8951262542 | 7.66612 | 3 | — |
| 4 | succeeded | -1.6110144868 | 7.47347 | 3 | — |
| 5 | succeeded | -1.6387710359 | 6.87479 | 3 | — |
| 6 | succeeded | -1.8296304770 | 6.98013 | 3 | — |
| 7 | succeeded | -1.8069973109 | 6.63124 | 3 | — |
| 8 | succeeded | -1.8297968839 | 6.77654 | 3 | — |
| 9 | succeeded | -1.8151380785 | 6.85117 | 3 | — |
| 10 | succeeded | -1.8235075665 | 6.93136 | 3 | — |
| 11 | succeeded | -1.8310169181 | 7.41388 | 3 | — |
| 12 | succeeded | -1.8237921178 | 6.72728 | 3 | — |
| 13 | succeeded | -1.8148892997 | 6.97059 | 3 | — |
| 14 | succeeded | -1.8301854946 | 6.87595 | 3 | — |
| 15 | succeeded | -1.8194100817 | 6.81127 | 3 | — |
| 16 | succeeded | -1.8240566107 | 6.89979 | 3 | — |
| 17 | succeeded | -1.8226089423 | 7.41521 | 3 | — |
| 18 | succeeded | -1.8348683392 | 7.0403 | 3 | — |
| 19 | succeeded | -1.8234387366 | 7.65236 | 3 | — |