Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -1.87247
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_kingston
Final energy-1.8565320645hartree
Shots1024
Runtime executionsession
Resilience1
MappingPT
Active space2e,2o
Parity mapping with full symmetry tapering · Shots and precision · Resilience settings
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_kingston
- Resource type
- ibm quantum hardware
- Processor family
- Heron r2
- Processor model
- Not recorded
- Processor revision
- Not recorded
- Qubits
- Not recorded
- Connectivity
- Not recorded
- Runtime execution
- session
- Shots
- 1024
- Precision
- 0.03125
- Resilience
- 1
- Submitted
- 2025-12-17T09:23:21+01:00
- Wall time (s)
- 367
Molecular system
- Charge
- 0
- Multiplicity
- 1
- Basis
- STO-3G
- Active space
- 2e,2o
- Active electrons
- 2
- Spatial orbitals
- 2
- Active orbital indices
- Not recorded
- Geometry units
- angstrom
Circuit
- Logical qubits
- 1
- Physical qubits
- Not recorded
- Parameters
- Not recorded
- Depth
- 1
- Two-qubit gates
- 0
- Hamiltonian terms
- Not recorded
Scientific provenance
- Cohort
- published h2
- Reference method
- exact diagonalization
- Reference energy (Ha)
- -1.85728
- Energy convention
- Published H2 benchmark electronic-energy convention
- Absolute error (Ha)
- 0.000742966
- Signed error (Ha)
- 0.000742966
- Total QPU time (s)
- 191
- Calibration time
- Not recorded
- Mean readout error
- Not recorded
- Mean two-qubit gate error
- Not recorded
Software
- Qiskit
- 1.4.3
- Qiskit Aer
- 0.17.1
- Qiskit Algorithms
- 0.3.1
- Qiskit Ibm Runtime
- 0.40.1
- Qiskit Nature
- 0.7.2
- Qiskit Nature Pyscf
- 0.4.0
Molecular geometry (angstrom)
| Atom | x | y | z |
|---|---|---|---|
| H | 0 | 0 | 0 |
| H | 0 | 0 | 0.735 |
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.
Download trajectory CSV · Download trajectory JSON
| Attempt | Outcome | Energy (Ha) | Elapsed (s) | Quantum (s) | Parameters |
|---|---|---|---|---|---|
| 1 | succeeded | -1.8216137156 | 69.4532 | 11 | — |
| 2 | succeeded | -0.5534227102 | 18.017 | 10 | — |
| 3 | succeeded | -0.8370700578 | 18.6216 | 10 | — |
| 4 | succeeded | -1.5913873867 | 18.728 | 10 | — |
| 5 | succeeded | -1.6169847962 | 18.0812 | 10 | — |
| 6 | succeeded | -1.8579200476 | 18.7592 | 10 | — |
| 7 | succeeded | -1.8376775321 | 17.6058 | 10 | — |
| 8 | succeeded | -1.8487381318 | 18.4376 | 10 | — |
| 9 | succeeded | -1.8724745682 | 18.4233 | 10 | — |
| 10 | succeeded | -1.8568998947 | 18.8938 | 10 | — |
| 11 | succeeded | -1.8585324180 | 20.8641 | 10 | — |
| 12 | succeeded | -1.8640679276 | 17.7288 | 10 | — |
| 13 | succeeded | -1.8670778090 | 19.2931 | 10 | — |
| 14 | succeeded | -1.8537040626 | 18.7196 | 10 | — |
| 15 | succeeded | -1.8639098316 | 17.8757 | 10 | — |
| 16 | succeeded | -1.8617831078 | 17.8611 | 10 | — |
| 17 | succeeded | -1.8670876511 | 18.6787 | 10 | — |
| 18 | succeeded | -1.8636891561 | 18.7859 | 10 | — |
| 19 | succeeded | -1.8565320645 | 17.7639 | 10 | — |