GCRI · 量子技術
量子と材料
Quantum technologies depend on materials, from superconducting circuits and semiconductor spin qubits to photonic chips and isotopically pure crystals. In turn, quantum simulation may one day help design new materials and molecules. This page sets out how materials limit quantum devices, how quantum methods could aid materials science, and what evidence serves the researchers and funders working at this intersection.
作業の進め方。
Quantum testbed
Quantum and materials · Testbed lab · Device QD-77
量子ビット
| Q0 | 142 | 116 | 0.02 | In spec |
| Q1 | 83 | 48 | 0.01 | In spec |
| Q2 | 69 | 99 | 0.01 | Drifting |
| Q3 | 142 | 21 | 0.05 | Drifting |
| Q4 | 162 | 83 | 0.03 | Drifting |
Device
- Topology
- heavy-hex, illustrative
- 2Q fidelity
- 0.989
- アクセス
- by committee
- ラベル
- 観測
図Quantum testbed: example names and illustrative values, not a record or a live system.
Quantum and materials: how the risk develops.
Chemistry and materials simulation. The dossier below sets out how the risk develops, what is measured, where the data come from, how it is modelled and who decides.
Defects cause decoherence
Impurities, surface defects and two-level システム in materials interact with qubits and shorten coherence. Better materials and fabrication extend it.
Fabrication sets yield
Producing many identical qubits needs precise fabrication. Variability between devices, even from one wafer, limits how far systems can scale.
Some inputs are scarce
Helium-3 for dilution refrigerators, isotopically enriched silicon and specialised lasers have limited suppliers, creating supply risks.
Quantum simulation of matter
Simulating molecules and materials is a leading candidate use of quantum computers, though classical methods remain strong for most problems today.
How quantum and materials is modelled, measured and tested.
モデル、その仮定、データ、不確実性を、科学者やエンジニアが確認する形で示します。構造は公表された手法に従っています。描かれた値は例示であり、知見ではありません。
システム・モデル
The couplings between the systems in quantum and materials: signs of influence, a reinforcing and a balancing loop, and cross-links where stress jumps.
Quantum devices depend on materials with their own supply risks.
Materials studies are designed for the 戦略システム・シリーズ. Export controls coordinated through the Wassenaar Arrangement and national lists apply to some quantum items.
- Supply data for specialised materials.
- Export control analyses.
何を、どの程度うまく測定しているか。
各指標には、その単位、更新頻度、背後にある出典の種類、値が持つことになるエビデンスのラベルが付いています。値は表示しません：プログラムが自らの権限のもとで値を提供します。
| 指標 | 単位 | 周期 | 出典の種類 | ラベル |
|---|---|---|---|---|
| Qubit coherence time by material platform | microseconds | per publication | Peer-reviewed results | 観測 |
| Device yield in fabrication | percent of functional qubits | per fabrication run | Foundry and lab reports | 報告値 |
| Helium-3 supply | litres per year | 年次 | Government and industry reports | 推定 |
| Quantum chemistry demonstrations with classical comparison | 件数 | レビューごと | Literature review | 推定 |
| Specialised component suppliers | count by component | 評価ごと | Supply chain studies | 推定 |
| Materials databases used for qubit research | 件数 | 評価ごと | Research surveys | 報告値 |
エビデンスの出所。
名前の明示された公開データセットと機関の記録。それぞれにライセンス区分があります。合意に基づく出典は、その条件のもとでのみ使用し、再公開することはありません。
| 出典 | 提供するもの | ライセンス区分 |
|---|---|---|
| Peer-reviewed materials and device literature | Coherence and fabrication results | Licence per article |
| Materials Project and other open materials databases | Computed materials properties | オープン、CC BY 4.0 |
| Government reports on helium-3 and critical inputs | Supply and demand of scarce inputs | Public, terms per government |
| Quantum supply chain studies | Component suppliers and dependencies | Licence per publication (to check) |
| Benchmark studies of quantum chemistry algorithms | Comparisons with classical methods | Licence per publication |
誰が決め、エビデンスが何に役立つか。
Quantum Technologies prepares evidence. The decisions below are taken by the authorities named, under their own rules, and never by the platform.
| 誰が決定するか | 質問 | このページが提供するエビデンス |
|---|---|---|
| 研究資金提供者 | Which materials and fabrication research to support | Bottleneck reviews |
| Industry and national ラボ | How to secure specialised inputs | Supply risk assessments |
| Chemistry and materials researchers | Where quantum simulation could help their work | Use case assessments |
このトピックが生み出す成果物
- Materials bottleneck reviews for qubit platforms
- Supply risk assessments for specialised inputs
- Assessments of quantum simulation use cases with classical baselines
- Evidence notes for research funders
専門家が問うこと。
The question is whether quantum simulation will beat improving classical methods on problems that matter.
- Which chemical and materials problems are genuinely hard for classical methods?
- How large and how error-free must a quantum computer be to simulate them usefully?
- Can near-term noisy devices provide any useful result, or is error correction required?
- How will results be verified when classical methods cannot reproduce them?
- Which industrial and scientific questions would change if simulation improved?
メカニズムと要因。
The behaviour of molecules and materials depends on how electrons interact. For many システム, classical approximations such as density functional theory work well. For strongly correlated systems, such as some catalysts, transition-metal complexes and high-temperature superconductors, the computational cost of exact classical simulation grows very rapidly with system size. A quantum computer represents quantum states natively and could, in principle, simulate such systems efficiently.
Resource estimates for industrially relevant problems suggest that large, error-corrected machines would be required. Meanwhile classical methods, including tensor networks and machine-learning approaches, keep improving and raising the bar. Quantum materials research also runs the other way: new materials are needed to build better qubits.
どのように研究され、手法がどこで止まるか。
| 手法またはデータ | 表示内容 | 限界 |
|---|---|---|
| Classical computational chemistry | Accurate results for many システム | Cost grows quickly for strongly correlated electrons |
| Quantum algorithm resource estimation | Qubits and operations needed for target problems | Highly sensitive to algorithm and hardware assumptions |
| Small-scale quantum simulation experiments | Proof of principle on simple molecules | Not yet beyond classical reach for useful problems |
| Experimental materials characterisation | Ground truth for validation | Experiments are costly and not always available |
Where this page’s references lead.
このページの読解の基準となる機関と文書。状態と版は変わります。各リンクは発行機関へ移動します。
質問と回答。
Why do materials matter for qubits?
What is quantum simulation?
Are there supply risks for quantum technology?
Has a quantum computer already designed a new material or drug?
Why is chemistry a natural application?
Should organisations wait for quantum simulation?
このページからエビデンスを提供する。
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