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GCRI · التقنيات الكمية

الحوسبة الكمومية

Quantum computers use qubits that can be in superpositions and become entangled, which in principle lets some problems be solved far faster than on classical computers. Current machines are noisy and small, and useful fault-tolerant computing requires error correction that is only beginning to be demonstrated. This page sets out how quantum computers work and fail, how progress is measured honestly, and what evidence serves the institutions deciding how to engage.

02السؤال

Quantum computing: how the risk develops.

Hardware, algorithms and actual maturity. The dossier below sets out how the risk develops, what is measured, where the data come from, how it is modelled and who decides.

الآلية

Qubits are fragile

Qubits lose their quantum state through interaction with their environment. Gate errors and decoherence limit how long a computation can run before results become noise.

الآلية

Error correction needs overhead

Fault-tolerant computing encodes each logical qubit in many physical qubits and corrects errors continuously. It only helps once physical error rates fall below a threshold.

الآلية

Advantage is problem-specific

Quantum algorithms speed up particular problems, such as simulating quantum النظم or factoring. For many tasks classical computers remain as good or better.

الآلية

Claims need classical comparison

Demonstrations of quantum advantage are often followed by improved classical methods. Honest comparison requires the best classical approach, not a convenient one.

03الرصد

Quantum testbed.

الشاشة التي قد يستخدمها فريق لمتابعة هذا الموضوع: مقاييسه وحالاته وقراراته. والأسماء أمثلة والقيم توضيحية.

Quantum testbed

Quantum computing · Testbed lab · Device QD-28

Calibration cycleGCRI · التقنيات الكمية

الكيوبتات

Q0121490.03Drifting
Q1118240.03Drifting
Q294410.03Drifting
Q373930.05Drifting
Q450480.02Drifting

Device

Topology
heavy-hex, illustrative
2Q fidelity
0.994
الوصول
by committee
الوسم
مرصود
Quantum testbed: the screen’s structure, terms and states for Quantum computing.أسماء مثالية وقيم توضيحية؛ تصميم وليس سجلًا ولا نظامًا حيًا.
05الأساليب والأدلة

How quantum computing is modelled, measured and tested.

النموذج وافتراضاته وبياناته وعدم اليقين فيه، بالصورة التي يفحصها بها عالم أو مهندس. وتتبع البنى أساليب منشورة. والقيم المرسومة توضيحية، وليست نتائج.

نموذج النظام

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

++−+التكنولوجيا الكميةالفضاء السيبرانيالمجتمعاتالاقتصاد⁨R⁩ معزِّزة⁨B⁩ موازِنة
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.
مبادئ FAIR التوجيهية · GO FAIR وFORCE11⁨W3C PROV⁩ · اتحاد الشبكة العالميةإرشادات بشأن المعالجة المتسقة لأوجه عدم اليقين · الهيئة الحكومية الدولية المعنية بتغير المناخبيانات CEOS الجاهزة للتحليل · لجنة سواتل رصد الأرض
06المؤشرات الفرعية

ما الذي يُقاس، ومدى جودة قياسه.

يحمل كل مؤشر وحدته ووتيرته ونوع المصدر الذي يستند إليه ووسم الأدلة الذي ستحمله القيمة. ولا تُعرض أي قيم: فالبرنامج يقدّمها بموجب سلطته الخاصة.

المؤشرالوحدةوتيرة الإصدارنوع المصدرالوسم
Physical qubit countqubitsper announcementPublished device resultsمُبلَّغ عنه
Two-qubit gate fidelitypercentper deviceBenchmark resultsمُبلَّغ عنه
Logical qubit error rateerrors per logical operationper experimentPeer-reviewed experimentsمرصود
Coherence timemicrosecondsper deviceDevice characterisationمُبلَّغ عنه
Quantum volume or similar holistic benchmarkbenchmark scoreper devicePublished benchmarksمُبلَّغ عنه
Demonstrations surviving classical challengeالعددلكل مراجعةLiterature reviewمُقدَّر
07المصادر

من أين تأتي الأدلة.

مجموعات بيانات عامة مسمّاة وسجلات مؤسسية، لكلٍّ منها فئة ترخيصها. ولا تُستخدم المصادر المتاحة بموجب اتفاق إلا وفق شروطها، ولا يُعاد نشرها أبدًا.

المصدرما يقدّمهفئة الترخيص
arXiv quant-ph and peer-reviewed journalsPrimary experimental and theoretical resultsOpen access preprints; journal licence per article
Metriq benchmark platform (Unitary Foundation)Community-submitted quantum benchmark resultsOpen, licence to check
Vendor technical documentation and roadmapsDevice specifications and stated targetsPublic documents, terms per vendor
National academies and agency assessments of quantum computingIndependent assessments of progress and prospectsPublic, terms per publisher
QED-C reportsIndustry consortium analyses of use cases and benchmarksPublic reports, terms to check
08القرارات

من يقرر، وما الذي تخدمه الأدلة.

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

من يقررالسؤالالأدلة التي تخدمها هذه الصفحة
Research funders and science ministriesHow much to invest in quantum computing research and accessProgress summaries; independent assessments
Organisations exploring quantum useWhether a problem is a plausible quantum use caseUse case assessments with classical baselines
Security agenciesHow progress affects cryptographic migration timelinesError correction and scale evidence

المخرجات التي يُنتجها هذا الموضوع

  • Progress summaries that separate peer-reviewed results from roadmaps
  • Benchmark interpretation guides
  • Use case assessments with classical baselines
  • Evidence notes for research funders
09الأسئلة الجوهرية

ما يسأل عنه الخبراء.

The central question is what has been demonstrated, not what has been promised.

  • How many qubits does a device have, and how good are they: what are their error rates and coherence times?
  • Can errors be corrected faster than they accumulate, and at what cost in physical qubits per logical qubit?
  • Which algorithms offer a demonstrated advantage over the best classical methods, and for which problems?
  • Are claims of quantum advantage robust to improved classical algorithms?
  • Which hardware approaches are likely to scale, and what limits them?
10الآليات

الآليات والمحرّكات.

Quantum computers gain their power from interference: algorithms are designed so that wrong answers cancel and right answers reinforce. That power is fragile. Qubits lose their quantum state through interaction with the environment, and every operation introduces some error. Quantum error correction encodes one reliable logical qubit in many physical qubits, but only works if physical error rates are below a threshold, and it multiplies the hardware required.

Known algorithms with large demonstrated speed-ups are few. Factoring and discrete logarithms, which underpin public-key cryptography, are the best-known examples; simulation of quantum النظم in chemistry and physics is another. For many optimisation and machine-learning problems, a practical advantage has not been established, and improved classical algorithms have repeatedly narrowed claimed gaps.

11المناهج والبيانات

كيف يُدرس، وأين تتوقف المناهج.

المنهج أو البياناتما يُظهرهالحدود
Benchmarking of gate fidelity and coherenceQuality of physical qubitsBenchmarks can be chosen to flatter a device
Error-correction experimentsWhether logical qubits outperform physical onesEarly demonstrations are small and short-lived
Algorithm complexity analysisTheoretical speed-up and resource estimatesResource estimates depend on hardware assumptions
Classical simulation and verificationWhether results could be reproduced classicallyVerification becomes harder as devices grow
Peer-reviewed literature versus announcementsWhat has been independently assessedAnnouncements often precede, or replace, peer review
12الأساليب

كيف يُدرس، وما لا تستطيع المناهج قوله.

13Where this page’s references

Where this page’s references lead.

الهيئات والوثائق التي تُقرأ هذه الصفحة في ضوئها. وتتغير الحالات والإصدارات؛ ويقود كل رابط إلى الهيئة المُصدِرة.

14أسئلة

أسئلة وأجوبة.

ما الكيوبت؟
The basic unit of quantum information, a two-level quantum system that can be in a superposition of states and become entangled with other qubits.
What is quantum advantage?
A demonstration that a quantum computer solves a specific task faster or better than the best known classical method. Claims are often challenged by improved classical methods.
What is fault-tolerant quantum computing?
Computing that uses quantum error correction so that long calculations can run reliably despite errors in physical qubits.
Why does qubit count alone mislead?
Because quality matters as much as quantity. Many noisy qubits may be less useful than fewer high-fidelity ones, and practical applications require error-corrected logical qubits.
Does the platform predict when large quantum computers will arrive?
No. Timelines are uncertain, and the platform reports expert views as ranges with their assumptions rather than as dates.
التقاريرساهم

ساهم بأدلة من هذه الصفحة.

التقارير 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.

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