GCRI · Tecnologie quantistiche

Quantistica e materiali

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.

01Canvas

Come si svolge il lavoro.

sistemi · intorno a questo temaIllustrativo

Quantum testbed

Quantum and materials · Testbed lab · Device QD-77

Calibration cycleGCRI · Tecnologie quantistiche

Qubit

Q01421160.02In spec
Q183480.01In spec
Q269990.01Drifting
Q3142210.05Drifting
Q4162830.03Drifting

Device

Topology
heavy-hex, illustrative
2Q fidelity
0.989
Accesso
by committee
Etichetta
OSSERVATO
Quantum testbed: the screen’s structure, terms and states for Quantum and materials.Nomi di esempio e valori illustrativi; un progetto, non un registro né un sistema attivo.

Fig.Quantum testbed: example names and illustrative values, not a record or a live system.

02La domanda

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.

Meccanismo

Defects cause decoherence

Impurities, surface defects and two-level sistemi in materials interact with qubits and shorten coherence. Better materials and fabrication extend it.

Meccanismo

Fabrication sets yield

Producing many identical qubits needs precise fabrication. Variability between devices, even from one wafer, limits how far systems can scale.

Meccanismo

Some inputs are scarce

Helium-3 for dilution refrigerators, isotopically enriched silicon and specialised lasers have limited suppliers, creating supply risks.

Meccanismo

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.

03Metodi ed evidenze

How quantum and materials is modelled, measured and tested.

Il modello, le sue ipotesi, i suoi dati e la sua incertezza, nella forma in cui uno scienziato o un ingegnere li verificherebbe. Le strutture seguono metodi pubblicati. I valori rappresentati sono illustrativi, non risultati.

Modello di sistema

The couplings between the systems in quantum and materials: signs of influence, a reinforcing and a balancing loop, and cross-links where stress jumps.

++−+QuantisticaCyberComunitàEconomiaR di rinforzoB bilanciamento
Causal loop diagram from the page’s systems; signs show the direction of influence. Illustrative structure for a system dynamics or network model, not estimated couplings.
Principi guida FAIR · GO FAIR e FORCE11W3C PROV · World Wide Web ConsortiumGuidance on consistent treatment of uncertainties · IPCCCEOS Analysis Ready Data · Comitato sui satelliti per l'osservazione della Terra
04Tra i domini

Quantum devices depend on materials with their own supply risks.

05Indicatori

Cosa viene misurato e con quale accuratezza.

Ogni indicatore riporta la sua unità, la sua cadenza, il tipo di fonte su cui si basa e l'etichetta di evidenza che un valore riporterebbe. Non sono mostrati valori: un programma li fornisce sotto la propria autorità.

IndicatoreUnitàCadenzaTipo di fonteEtichetta
Qubit coherence time by material platformmicrosecondsper publicationPeer-reviewed resultsOSSERVATO
Device yield in fabricationpercent of functional qubitsper fabrication runFoundry and lab reportsRIPORTATO
Helium-3 supplylitres per yearannualeGovernment and industry reportsSTIMATO
Quantum chemistry demonstrations with classical comparisonconteggioper revisioneLiterature reviewSTIMATO
Specialised component supplierscount by componentper valutazioneSupply chain studiesSTIMATO
Materials databases used for qubit researchconteggioper valutazioneResearch surveysRIPORTATO
06Fonti

Da dove provengono le evidenze.

Set di dati pubblici e registri istituzionali specifici, ciascuno con la sua classe di licenza. Le fonti soggette ad accordo sono utilizzate solo alle relative condizioni e mai ripubblicate.

FonteCosa fornisceClasse di licenza
Peer-reviewed materials and device literatureCoherence and fabrication resultsLicence per article
Materials Project and other open materials databasesComputed materials propertiesAperto, CC BY 4.0
Government reports on helium-3 and critical inputsSupply and demand of scarce inputsPublic, terms per government
Quantum supply chain studiesComponent suppliers and dependenciesLicence per publication (to check)
Benchmark studies of quantum chemistry algorithmsComparisons with classical methodsLicence per publication
07Decisioni

Chi decide, e a cosa servono le evidenze.

Quantum Technologies prepares evidence. The decisions below are taken by the authorities named, under their own rules, and never by the platform.

Chi decideLa domandaEvidenze fornite da questa pagina
Finanziatori della ricercaWhich materials and fabrication research to supportBottleneck reviews
Industry and national laboratoriHow to secure specialised inputsSupply risk assessments
Chemistry and materials researchersWhere quantum simulation could help their workUse case assessments

Output prodotti da questo argomento

  • 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
08Questioni centrali

Cosa si chiedono gli esperti.

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?
09Meccanismi

Meccanismi e fattori.

The behaviour of molecules and materials depends on how electrons interact. For many sistemi, 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.

10Metodi e dati

Come viene studiato, e dove si fermano i metodi.

Metodo o datiCosa mostraLimiti
Classical computational chemistryAccurate results for many sistemiCost grows quickly for strongly correlated electrons
Quantum algorithm resource estimationQubits and operations needed for target problemsHighly sensitive to algorithm and hardware assumptions
Small-scale quantum simulation experimentsProof of principle on simple moleculesNot yet beyond classical reach for useful problems
Experimental materials characterisationGround truth for validationExperiments are costly and not always available
11Metodi

Come viene studiato, e cosa i metodi non possono dire.

12Where this page’s references

Where this page’s references lead.

Gli organismi e i documenti alla luce dei quali si legge questa pagina. Stato ed edizioni cambiano; ogni link porta all'organismo emittente.

13Domande

Domande e risposte.

Why do materials matter for qubits?
Because defects and impurities in materials disturb qubits and shorten coherence, so better materials and fabrication directly improve device performance.
What is quantum simulation?
Using a controllable quantum system or quantum computer to model another quantum system, such as a molecule or material.
Are there supply risks for quantum technology?
Some inputs, such as helium-3 and certain lasers and isotopes, have few suppliers, which supply chain studies identify as risks.
Has a quantum computer already designed a new material or drug?
Not in a way that classical methods could not match. Current demonstrations are proofs of principle on small systems.
Why is chemistry a natural application?
Because molecules are quantum systems. Simulating quantum systems with quantum hardware avoids some of the exponential costs classical computers face.
Should organisations wait for quantum simulation?
That is their decision. Evidence suggests classical methods will remain the workhorse for most problems for some time, while research into quantum methods continues.
RapportiContribuisci

Contribuisci con evidenze da questa pagina.

Rapporti is the Consortium’s quarterly publication. What you know about this subject can become evidence, a case or a correction in the next edition, credited to you and published under CC BY 4.0 where it is your own work.

GCRITecnologie quantisticheTecnologia esponenzialeProspettive Foresight
Tecnologie quantistiche

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