Method
- Mapper
- JW
- Ansatz
- UCC
- Optimizer
- COBYLA
- Maximum iterations
- 30
- Best energy (Ha)
- -0.917939
H2
H2 VQE accuracy-cost benchmark · hardware · ibm_brussels
Final energy-0.9179388362hartree
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
- 2026-02-26T23:10:35+01:00
- Wall time (s)
- 375
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
23 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 | -0.8466709865 | 15.8712 | 11 | — |
| 2 | succeeded | -0.8886302958 | 15.5665 | 10 | — |
| 3 | succeeded | -0.8989477889 | 15.7698 | 10 | — |
| 4 | succeeded | -0.9173124323 | 15.9733 | 10 | — |
| 5 | succeeded | -0.9142949576 | 15.1255 | 10 | — |
| 6 | succeeded | -0.8779012845 | 15.3678 | 10 | — |
| 7 | succeeded | -0.8344552412 | 15.0479 | 10 | — |
| 8 | succeeded | -0.8656484250 | 15.0906 | 10 | — |
| 9 | succeeded | -0.8418646143 | 15.3592 | 10 | — |
| 10 | succeeded | -0.9002945510 | 15.7153 | 11 | — |
| 11 | succeeded | -0.9024496461 | 20.4981 | 14 | — |
| 12 | succeeded | -0.8590728745 | 19.4823 | 14 | — |
| 13 | succeeded | -0.8536543245 | 15.82 | 11 | — |
| 14 | succeeded | -0.8655273780 | 15.0841 | 10 | — |
| 15 | succeeded | -0.8488127532 | 15.3594 | 10 | — |
| 16 | succeeded | -0.8895066420 | 16.4869 | 10 | — |
| 17 | succeeded | -0.8857208726 | 15.2567 | 10 | — |
| 18 | succeeded | -0.8703317294 | 15.8161 | 10 | — |
| 19 | succeeded | -0.8597808053 | 15.7689 | 10 | — |
| 20 | succeeded | -0.8165719685 | 15.2579 | 10 | — |
| 21 | succeeded | -0.7910262794 | 15.517 | 10 | — |
| 22 | succeeded | -0.9179388362 | 15.2991 | 10 | — |
| 23 | succeeded | -0.8227636483 | 22.2053 | 17 | — |