Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.84758
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_miami
Final energy-1.8475781173hartree
Shots2048
Runtime executionsingle-job
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_miami
- Resource type
- ibm quantum hardware
- Processor family
- Nighthawk r1
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- single-job
- Shots
- 2048
- Precision
- 0.0220971
- Resilience
- 0
- Submitted
- 2026-03-09T12:03:46+01:00
- Wall time (s)
- 1007
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
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 | -1.8206463390 | 22.4661 | 18 | — |
| 2 | succeeded | -0.5865853926 | 22.8997 | 18 | — |
| 3 | succeeded | -0.8444312501 | 23.4239 | 18 | — |
| 4 | succeeded | -1.3348069234 | 23.0414 | 18 | — |
| 5 | succeeded | -1.7984841896 | 23.7074 | 18 | — |
| 6 | succeeded | -1.7602593483 | 23.249 | 18 | — |
| 7 | succeeded | -1.8261671235 | 22.6365 | 18 | — |
| 8 | succeeded | -1.8244468506 | 29.4528 | 18 | — |
| 9 | succeeded | -1.8377875018 | 23.7658 | 18 | — |
| 10 | succeeded | -1.8117782074 | 50.6102 | 18 | — |
| 11 | succeeded | -1.8378969916 | 50.118 | 18 | — |
| 12 | succeeded | -1.8239091762 | 50.9739 | 18 | — |
| 13 | succeeded | -1.8276521936 | 60.2952 | 19 | — |
| 14 | succeeded | -1.8319621416 | 51.0417 | 18 | — |
| 15 | succeeded | -1.8475781173 | 55.8442 | 19 | — |
| 16 | succeeded | -1.8195233388 | 49.6745 | 18 | — |
| 17 | succeeded | -1.8331621173 | 50.7648 | 18 | — |
| 18 | succeeded | -1.8254245884 | 65.7646 | 19 | — |
| 19 | succeeded | -1.8376845284 | 50.7921 | 18 | — |
| 20 | succeeded | -1.8248240575 | 50.797 | 18 | — |
| 21 | succeeded | -1.8196664290 | 50.6535 | 18 | — |
| 22 | succeeded | -1.8339046524 | 50.072 | 18 | — |
| 23 | succeeded | -1.8277562530 | 50.8695 | 18 | — |
| 24 | succeeded | -1.8394525208 | 50.9128 | 18 | — |