Method
- Mapper
- PT
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 40
- Best energy (Ha)
- -1.84189
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_aachen
Final energy-1.8325632155hartree
Shots4096
Runtime executionsession
Resilience0
MappingPT
Active space2e,2o
Execution
- Mode
- hardware
- Provider
- IBM Quantum
- Compute resource
- ibm_aachen
- Resource type
- ibm quantum hardware
- Processor family
- Heron r2
- Processor model
- —
- Processor revision
- —
- Qubits
- —
- Connectivity
- —
- Runtime execution
- session
- Shots
- 4096
- Precision
- 0.015625
- Resilience
- 0
- Submitted
- 2025-09-19T15:35:54+02:00
- Wall time (s)
- 186
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
22 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 | -1.8114432554 | 18.3577 | 11 | — |
| 2 | succeeded | -0.5816413133 | 9.07136 | 4 | — |
| 3 | succeeded | -0.8795287078 | 8.97737 | 4 | — |
| 4 | succeeded | -1.5971123015 | 7.57576 | 4 | — |
| 5 | succeeded | -1.6388068084 | 8.15199 | 4 | — |
| 6 | succeeded | -1.8316293618 | 7.8114 | 4 | — |
| 7 | succeeded | -1.8036607905 | 8.26139 | 4 | — |
| 8 | succeeded | -1.8182101060 | 7.95443 | 4 | — |
| 9 | succeeded | -1.8269432590 | 7.59041 | 4 | — |
| 10 | succeeded | -1.8301990366 | 7.84093 | 4 | — |
| 11 | succeeded | -1.8372980898 | 8.24247 | 4 | — |
| 12 | succeeded | -1.8343480080 | 7.89388 | 4 | — |
| 13 | succeeded | -1.8370498541 | 8.12979 | 4 | — |
| 14 | succeeded | -1.8341187447 | 7.64027 | 4 | — |
| 15 | succeeded | -1.8402492577 | 8.04989 | 4 | — |
| 16 | succeeded | -1.8407256707 | 7.62736 | 4 | — |
| 17 | succeeded | -1.8290483754 | 7.88826 | 4 | — |
| 18 | succeeded | -1.8418915030 | 8.19879 | 4 | — |
| 19 | succeeded | -1.8251622677 | 8.1297 | 4 | — |
| 20 | succeeded | -1.8398785332 | 7.35581 | 4 | — |
| 21 | succeeded | -1.8278651998 | 7.65606 | 4 | — |
| 22 | succeeded | -1.8325632155 | 7.66 | 4 | — |