| Term | Meaning / Origin |
|---|---|
| Quantum | From Latin quantus ("how much"); smallest discrete unit of energy/matter |
| Qubit | Quantum Bit — fundamental unit of quantum information; unlike classical bit (0 or 1), a qubit can be 0, 1, or both simultaneously (superposition) |
| Quantum Supremacy | When a quantum computer completes a task impossible for any classical computer in a practical timeframe |
| Quantum Advantage | Preferred newer term; quantum computer outperforms classical on a useful, verifiable problem |
| Decoherence | Loss of quantum properties when a qubit interacts with the environment — the #1 engineering challenge |
| QKD | Quantum Key Distribution — using quantum physics to share encryption keys that cannot be intercepted without detection |
| Post-Quantum Cryptography (PQC) | Classical encryption algorithms resistant to quantum attack; NIST finalized standards in 2024 |
| Principle | What It Means | Analogy | Application |
|---|---|---|---|
| Superposition | A qubit exists in all possible states simultaneously until measured — then collapses to one state | A coin spinning is both heads & tails; landing is 0 or 1 | Quantum parallelism — compute multiple answers simultaneously |
| Entanglement | Two qubits are linked; measuring one instantly determines the other, regardless of distance. Einstein called it "spooky action at a distance" | Magic dice — if one shows 6, its twin across the universe also shows 6 | Quantum communication & cryptography (QKD) |
| Quantum Tunnelling | Particles pass through energy barriers that classical physics says are impenetrable | A ball rolling through a hill instead of over it | Quantum sensing, atomic clocks, semiconductor chips |
| Domain | What It Does | India's NQM Target | Key Players |
|---|---|---|---|
| Quantum Computing | Processes information using qubits; solves exponentially complex problems | 50–1,000 qubit computers by 2031 | IBM, Google, QpiAI (India) |
| Quantum Communication | Uses QKD & entanglement for unhackable data transmission | 2,000 km satellite QKD network | QNu Labs (India), China's Micius satellite |
| Quantum Sensing & Metrology | Ultra-precise measurement of gravity, time, magnetic fields | Quantum magnetometers & atomic clocks | IIT Bombay Quantum Sensing Hub |
| Quantum Materials & Devices | Develops superconductors, topological materials for qubit fabrication | Indigenous chip fab at IIT Bombay & IISc | C-DAC, DRDO |
| Type | How It Works | Who Uses It | Advantage |
|---|---|---|---|
| Superconducting | Electrical circuits cooled near absolute zero | Google (Willow), IBM, QpiAI India | Scalable; most mature |
| Topological | Uses Majorana fermions — exotic quantum particles | Microsoft (Majorana 1 chip, 2025) | More stable; lower error rates |
| Photonic | Uses photons (light particles) as qubits | IIT Madras, PsiQuantum | Room temperature possible; fast |
| Trapped Ion | Ions held in electromagnetic traps | IonQ, Honeywell | Long coherence times; high fidelity |
| Quantum Annealing | Optimisation-focused; not universal QC | D-Wave | Good for optimisation problems |
A 300-qubit quantum computer can represent more states simultaneously than there are atoms in the observable universe (~1080). India's NQM target is 50–1,000 physical qubits within 8 years.
Quantum Supremacy ≠ Quantum Advantage. Google prefers "quantum advantage" or "beyond-classical" since 2019. "Supremacy" implies universal superiority — but quantum computers currently beat classical only on specific benchmark tasks, not generally. UPSC Prelims 2025 tested the Majorana 1 chip — know that it uses topological qubits, NOT superconducting.
| Programme / Act | Year | Key Details | Ministry / Body |
|---|---|---|---|
| QuEST Quantum Enabled Science & Technology | 2018 | Funded 51 national quantum labs; budget ₹250 crore; India's first quantum R&D push | DST |
| NM-QTA National Mission on Quantum Technologies & Applications | 2020 | Budget 2020–21 announced ₹8,000 crore over 5 years; delayed 4 years with no progress | DST |
| NQM National Quantum Mission | 2023 | Revised to ₹6,003.65 crore for 2023–2031; approved 19 April 2023 by Union Cabinet; India becomes 7th country with dedicated quantum mission | DST / MoST |
| RDI Scheme Research, Development & Innovation | 2025 | Approved 1 July 2025; ₹1 lakh crore over 6 years; explicitly prioritises quantum technology | Cabinet / DST |
| ITES-Q International Technology Engagement Strategy for Quantum | 2025 | India's quantum diplomacy framework; ₹600 crore boost in Budget 2025 supplementary | MEA / DST |
| DPDP Act 2023 Digital Personal Data Protection Act | 2023 | Strengthens case for quantum-safe encryption; QKD deployment for personal data protection | MeitY |
| IT Act 2000 (as amended) | 2000/2008 | Governs cyber security; quantum-safe cryptography transition required under this framework | MeitY |
| Provision / Entry | Relevance to Quantum Technology |
|---|---|
| Entry 31, List I (Posts & Telegraphs) | Quantum communication networks and satellite QKD fall under Union jurisdiction |
| Article 51A(h) Fundamental Duty | Develop scientific temper — promotes awareness of quantum science among citizens |
| Entry 14, List I (Atomic Energy) | Quantum research involving nuclear magnetic resonance & particle physics under Union control |
| GS-III Science & Technology | NQM, applications in defence/health/economy, quantum supremacy milestones |
| GS-II Government Policies | NQM as a flagship government mission; DST role; India's position in global quantum race |
| Body / Institution | Role in Quantum Tech |
|---|---|
| DST — Dept of Science & Technology | Nodal body implementing NQM; oversees T-Hubs |
| PMSTIAC | NQM is one of 9 missions under PM's Science Technology Innovation Advisory Council |
| C-DAC, Bengaluru | 100-qubit superconducting facility (scalable to 250 qubits); ₹70–80 crore investment |
| C-DOT | Quantum communication & QKD network deployment |
| DRDO | QKD demonstrations over 100+ km fibre; defence-grade quantum encryption |
| MeitY / BISAG-N | MoU (Jan 2026) to integrate indigenous "Vedic Kavach" cryptographic software with quantum hardware |
| I-HUB QTF — IISER Pune | I-HUB Quantum Technology Foundation; launched 2021; interdisciplinary quantum R&D |
India is the 7th country with a dedicated National Quantum Mission, after the US, Austria, Finland, France, Canada, and China. The NQM is implemented by DST under the Ministry of Science & Technology.
UPSC often pairs current NQM news with the budget figure (₹6,003.65 crore), duration (2023–2031 = 8 years), and approval date (19 April 2023). Remember: the earlier NM-QTA (2020) was never formally implemented — NQM replaced it.
| Country | Mission / Programme | Public Investment | Unique Strength |
|---|---|---|---|
| China | National Quantum Lab; Micius Satellite; Made in China 2025 | ~$15 billion | Leads in QKD networks; 12,000 km quantum communication network; Micius satellite |
| USA | National Quantum Initiative (NQI) Act 2018 | ~$6 billion (public); leads in private sector | Google, IBM, Microsoft; 44% of global private quantum funding; leads in computing research quality |
| EU | Quantum Flagship Programme (2018–2028) | €10 billion+ | Strong research ecosystem; 8 of 19 new quantum ventures globally in 2024 were European |
| UK | National Quantum Technologies Programme (2014) | £2.5 billion (over decade) | First country with national quantum programme; startup-led ecosystem |
| Germany | Quantum Technologies Framework | ~$3.1 billion | Germany leads EU in quantum investment (46% of EU total); leads in quantum sensing research |
| India | NQM (2023–2031) | ₹6,003.65 Cr (~$730 million) | 7th country with dedicated mission; growing startup ecosystem; 477% increase in equity funding (2025 vs 2024) |
| Canada | National Quantum Strategy (NQS) | ~$360 million | Strong academic base; Xanadu (photonic QC) |
| Japan | Quantum Technology Innovation Strategy | ~$500 million | Leads in quantum patents (2nd globally after US) |
Global public investment in quantum technology has surpassed $55.7 billion (Qureca, 2025). The global quantum technology market is projected to reach $106 billion by 2040. In Q1 2025 alone, $1.25 billion flowed into quantum firms — 70% of the entire previous year's total.
| T-Hub Domain | Lead Institution | Focus Area |
|---|---|---|
| Quantum Computing | IISc Bengaluru | Quantum algorithms, superconducting qubits, software stack |
| Quantum Communication | IIT Madras | QKD networks, satellite quantum comms, fibre infrastructure |
| Quantum Sensing & Metrology | IIT Bombay | Quantum sensors, atomic clocks, quantum diamond microscope |
| Quantum Materials & Devices | IIT Delhi | Superconductors, topological materials, qubit fabrication |
IISc Bengaluru = Quantum Computing T-Hub, NOT IIT Madras. IIT Madras = Quantum Communication. The Army Quantum Lab is at Military College of Telecommunication Engineering, Mhow, Madhya Pradesh — NOT at IISc.
| Target Area | 3-Year Goal (by 2026) | 8-Year Goal (by 2031) |
|---|---|---|
| Quantum Computers | 50–1,000 physical qubits (multiple platforms) | Fault-tolerant logical qubits; scalable systems |
| QKD Network | Inter-city QKD network (multi-node) | 2,000 km satellite-based secure QKD network |
| Quantum Sensors | Lab-scale quantum magnetometers & atomic clocks | Navigation-grade quantum sensors; deploy in defence |
| Quantum Materials | Indigenous superconducting qubit fabrication | Full domestic fab capacity at IIT Bombay & IISc |
| Startups | Initial ecosystem seeding; funded under NQM | 10 globally competitive startups by 2035 (December 2025 roadmap) |
| Market Share | — | 50% of global quantum software market by 2035 (December 2025 roadmap) |
| Institution | Contribution | Year |
|---|---|---|
| TIFR Mumbai | India's first quantum computer — 3-qubit superconducting; 7-qubit system with DRDO & TCS | 2018–2022 |
| QpiAI (startup, NQM-funded) | 25-qubit "Indus" (April 2025); 64-qubit system (late 2025); India's most powerful indigenous quantum computer | 2025 |
| QNu Labs (IIT Madras incubated) | 1,000 km QKD network over optical fibre; 25 Armos QKD systems for Navy; iDEX winner for Army | 2022–2025 |
| IIT Bombay Quantum Sensing Hub | Quantum Diamond Microscope (semiconductor chip testing, trojan detection, neuronal imaging) | 2025 |
| PrenishQ (NQM-funded startup) | India's first indigenous high-precision diode laser — core component for quantum systems | 2025 |
| Quantum Valley Tech Park, Amaravati | India's first quantum tech park (May 2025); IBM Quantum System Two to be installed; built by L&T | 2025–2026 |
India ranks 2nd globally in quantum-related graduates (after EU). However, India's investment (~$730 million) is an order of magnitude behind China ($15 billion). This gap is the single biggest challenge in India's quantum ambitions.
Google Sycamore | 53 qubits | October 2019 — First claimed "quantum supremacy": completed Random Circuit Sampling (RCS) in 200 seconds vs 10,000 years on classical supercomputer. Later IBM disputed the claim; Google refined the terminology to "quantum advantage." Significance: proved quantum computers can exceed classical on specific tasks.
Google Willow | 105 qubits | December 9, 2024 — Two breakthroughs: (1) Reduces error rates exponentially as qubit count scales (below-threshold error correction — a 30-year engineering challenge solved); (2) RCS benchmark completed in under 5 minutes vs 10 septillion (1025) years on classical supercomputer. Built with superconducting transmon qubits in Santa Barbara. Error rate: ~0.1% per gate.
Google | Willow chip | October 22, 2025 — First-ever verifiable quantum advantage: "Quantum Echoes" algorithm runs 13,000x faster than best classical supercomputer. Unlike 2019, this result is verifiable and linked to real physical application (molecular structure, nuclear spin echoes). UPSC angle: distinction between "quantum supremacy," "quantum advantage," and "verifiable quantum advantage."
Microsoft | Majorana 1 | 2025 — World's first quantum chip using topological qubits based on Majorana fermions (exotic quantum particles). Significance: Topological qubits are inherently more stable than superconducting qubits; could enable million-qubit fault-tolerant quantum computing. Directly tested in UPSC Prelims 2025.
China | Micius / QUESS | August 2016 — World's first quantum communication satellite; demonstrated quantum entanglement over 1,200 km (ground-based record broken multiple times); enables satellite-based QKD. Beijing–Shanghai quantum communication backbone: 2,000+ km. China's total quantum network: 12,000 km (world's largest).
IBM | Condor | 2023 — World's first quantum processor to break 1,000-qubit barrier with 1,121 superconducting qubits. IBM's roadmap targets fault-tolerant quantum computing by ~2030 with modular quantum systems.
QpiAI | NQM-funded | April 2025 & Nov 2025 — India's most powerful indigenous quantum computers. "QpiAI-Indus" (25 qubits, superconducting, April 2025) — India's first full-stack quantum computing system under NQM. 64-qubit system launched late 2025, ahead of schedule. Available to research institutions, enterprises, and government for quantum algorithm development.
QNu Labs | STRIDE | 2025 — India's first extensive 1,000 km QKD network over existing optical fibre, under NQM. Deployed by Southern Command Signals across Rajasthan's Corps network. Significantly ahead of original 2,000 km / 8-year NQM target. Earlier deployments: 150 km Army QKD (iDEX winner); 25 Armos QKD systems for Indian Navy.
Voyager Space & IBM | ISS | April 15, 2026 — First post-quantum secured communication link between Earth and the International Space Station, using NIST-standardized post-quantum cryptography (PQC) algorithms (ML-KEM, ML-DSA, SLH-DSA). Proves critical satellite infrastructure can be quantum-secured without hardware changes ("crypto-agility").
UPSC asked about Majorana 1 chip (Microsoft, 2025) directly in Prelims 2025 — both statements were correct. Know: Majorana 1 = Microsoft = Topological qubits = Quantum Computing. Do NOT confuse with Google's superconducting approach. NIST's 2024 PQC standards (ML-KEM, ML-DSA, SLH-DSA) may feature in Prelims 2026.
| Feature | Detail | Significance |
|---|---|---|
| Approved by | Union Cabinet, chaired by PM | Cabinet-level approval = highest policy priority |
| Approval Date | 19 April 2023 | Frequently tested in UPSC fact-based MCQs |
| Budget | ₹6,003.65 crore | India's largest S&T investment in a single mission (quantum) |
| Duration | 2023–24 to 2030–31 (8 years) | Aligns with India's Viksit Bharat 2047 technology goals |
| Implementing Body | Department of Science & Technology (DST) | MoST oversight; reports to PMSTIAC |
| Mission Governing Board Chairman | Dr Ajai Chowdhry (HCL Founder) | Industry-academia-government linkage |
| India's Status | 7th country with dedicated quantum mission | After US, Austria, Finland, France, Canada, China |
| Thematic Hubs (T-Hubs) | 4 hubs (IISc, IIT-M, IIT-B, IIT-D) | Concentrated excellence in each domain |
| Quantum Fabrication Facilities | IIT Bombay & IISc (₹720 crore); small-scale at IIT Delhi & IIT Kanpur | India's first indigenous quantum chip fabrication |
| Quantum Simulator (QSim) | Available for cloud-based algorithm testing | Allows Indian researchers to develop quantum software without hardware |
The Liquid Helium Facility at IIT Bombay (inaugurated by Minister Jitendra Singh) reduces helium costs to 1/10th of present value, critical for all superconducting qubit research. It is open to all industry, academia, and R&D institutions.
| Concept / Domain | Quantum Technology Link | UPSC Angle |
|---|---|---|
| Cybersecurity / Encryption | Shor's algorithm threatens RSA encryption; QKD provides quantum-safe comms; NIST 2024 PQC standards | GS-III: Internal Security; threat to banking, defence systems |
| National Security / Defence | Quantum radar (detects stealth aircraft); Quantum GPS-independent navigation; QKD for military comms; submarine detection | GS-III: Defence; DRDO role; iDEX quantum challenges |
| Drug Discovery / Healthcare | Quantum computers simulate molecular interactions; Quantum Diamond Microscope for neuronal imaging | GS-III: S&T applications; AI + quantum convergence |
| Finance & Banking | Quantum algorithms for portfolio optimisation, fraud detection; RSA encryption risk ("harvest now, decrypt later" attacks) | GS-III: Economy; RBI cyber framework |
| Climate & Energy | Quantum simulation for new materials (batteries, solar cells); optimising energy grids | GS-III: Environment + S&T convergence |
| Space Technology | Satellite-based QKD (China's Micius; India's 2,000 km target); future Gaganyaan quantum experiments | GS-III: Space; ISRO collaboration |
| Agriculture | Quantum sensors for soil analysis; quantum simulation for fertiliser/pesticide design | GS-III: Agriculture + technology |
| AI / Machine Learning | Quantum Machine Learning (QML) — exponentially faster training; convergence discussed at Paris AI Action Summit 2025 | GS-III: Emerging Tech; IndiaAI Mission + NQM synergy |
| Geopolitics | Quantum technology in AUKUS framework; Quad joint quantum research; China-US quantum race; export controls on quantum components | GS-II: International Relations; technology competition |
| Framework | Quantum Link |
|---|---|
| Quad (India-US-Australia-Japan) | Joint research in quantum technologies for positioning, navigation, and timing (PNT); post-quantum cryptography cooperation |
| AUKUS | Australia-UK-US: joint quantum investment for secure communications and navigation (excludes India) |
| UN Year of Quantum Science (2025) | United Nations declared 2025 the International Year of Quantum Science and Technology (IYQ) |
| NIST PQC Standards (2024) | US NIST finalised first post-quantum cryptography standards: ML-KEM, ML-DSA, SLH-DSA; India planning PQC migration |
| India-IBM Partnership | IBM Quantum System Two at AQV Amaravati; TCS-IBM quantum cloud services; NQM curriculum development |
| Metric | India's Rank / Status | Source |
|---|---|---|
| Quantum-related graduates | 2nd globally (after EU) | Quantum Security report, 2026 |
| National Quantum Mission | 7th country with dedicated mission | DST / PSA, 2023 |
| Public investment in quantum | ~$730 million (₹6,003 Cr) — well behind China ($15B), US ($6B), EU ($10B) | NQM, 2023 |
| Startup quantum equity growth | 477% increase in 2025 vs 2024 | WION News, Apr 2026 |
| QKD deployment milestone | 1,000 km QKD network (2025) — ahead of NQM schedule | DST/PIB, 2025 |
| Qubit milestone | 64-qubit indigenous system (QpiAI, 2025) | BW Businessworld, Nov 2025 |
"Harvest now, decrypt later" (HNDL) attacks — adversaries collect encrypted data today intending to decrypt it when quantum computers mature. This is India's biggest near-term quantum security threat (more urgent than quantum supremacy). It affects defence data, banking systems, and state communications. Featured in Prelims 2025 threat analysis questions.
India Launches Four Indigenous Quantum Products under NQM (November 3, 2025): Union Minister Jitendra Singh unveiled four products: (1) QpiAI's 64-qubit quantum computer — India's most powerful, made ahead of schedule; (2) PrenishQ's high-precision diode laser — India's first indigenous laser for quantum communication/computing; (3) IIT Bombay's Quantum Diamond Microscope — for semiconductor chip testing, trojan detection, neuronal imaging; (4) a fourth NQM startup product. Dr Ajai Chowdhry (HCL Founder, NQM Governing Board Chairman) declared India as a "Product Nation" in quantum technology.
Quantum Fabrication Facilities at IIT Bombay & IISc (₹720 Cr) Announced: Two major state-of-the-art quantum fabrication and central facilities were announced at IIT Bombay (Quantum Sensing & Metrology) and IISc Bengaluru (Quantum Computing). Small-scale facilities also to be set up at IIT Delhi and IIT Kanpur. Total investment: ₹720 crore. Goal: End India's 100% reliance on foreign quantum chip fabrication. A Liquid Helium Facility was also inaugurated at IIT Bombay, reducing cryogenic costs to 1/10th of current value.
State-Level Quantum Missions Emerge (2025–2026): Three Indian states are now leading quantum ecosystems: Andhra Pradesh — Quantum Valley Tech Park (Amaravati, May 2025); "AP Quantum Computing Policy 2025–30"; AP State Quantum Mission (APSQM); IBM Quantum System Two to be installed; first open-access quantum testbeds (April 14, 2026). Karnataka — ₹1,000 crore Quantum Mission (July 2025); Quantum Research Park at IISc. Telangana — aims to make Hyderabad India's first "Quantum City"; ₹1,000 crore Young India Startup Fund with QT emphasis.
QNu Labs deploys 1,000 km QKD Network (2025): India's most significant quantum communication deployment — 1,000 km Quantum Key Distribution network over existing optical fibre, significantly ahead of NQM's original 2,000 km / 8-year schedule. Deployed under STRIDE (Synergy of Technology, Research, Industry, and Defence Ecosystem). Also: MeitY / BISAG-N MoU (January 28, 2026) to integrate "Vedic Kavach" indigenous cryptographic software with quantum hardware. India's startup equity funding in quantum grew 477% in 2025 vs 2024.
India's Quantum Valley Tech Park & Workforce Surge (2026): Ground broken on Quantum Valley Tech Park, Amaravati (built by L&T); IBM's first Indian quantum computer (Quantum System Two) to be hosted here. NPTEL quantum computing course (IBM-IIT Madras): 208,785+ enrollments in 2026. IBM trained 9,500+ faculty in quantum technology in 2025. NIELIT signed MoU to establish India's first dedicated Quantum and AI University campus at AQV. NQM confirmed: all four T-Hubs operational and showing strong progress (DST statement, 2026).
Voyager-IBM First Post-Quantum Security on ISS (April 15, 2026): World's first post-quantum secured communication link between Earth and the International Space Station, using NIST-standardized PQC algorithms. Establishes quantum-security blueprint for future lunar and deep-space missions. Relevance for UPSC: demonstrates "crypto-agility" — legacy hardware can be upgraded to quantum-safe without code changes.
NQM Lok Sabha Update (4 February 2026): Minister Jitendra Singh confirmed NQM is being implemented with full outlay of ₹6,003.65 crore. India's quantum ecosystem investment is explicitly linked to PM Modi's ₹1 lakh crore RDI Scheme (approved July 1, 2025) which prioritises quantum technology. India's December 2025 quantum roadmap targets: 50% of global quantum software market and 10 globally competitive startups by 2035.
UPSC Prelims 2026 is highly likely to test: (1) NQM T-Hub locations (statement-based); (2) QpiAI / Majorana 1 — technology type (topological vs superconducting); (3) Google Willow — what was achieved (error correction below threshold); (4) QNu Labs QKD — organisation type (startup, IIT Madras-incubated); (5) UN IYQ 2025 — which UN body declared 2025 as International Year of Quantum Science.
| Statement | T/F | Reason |
|---|---|---|
| 1. Qubit can represent only 0 or 1 at any given time | ❌ | Qubit can represent 0, 1, or both simultaneously via superposition; classical bit is 0 or 1 only |
| 2. The Majorana 1 chip (2025) was developed by Microsoft and uses topological qubits | ✅ | UPSC Prelims 2025 direct question — both facts correct. Majorana fermions = topological approach, distinct from Google's superconducting |
| 3. National Quantum Mission (NQM) was approved in 2020 with a budget of ₹8,000 crore | ❌ | NM-QTA (2020) proposed ₹8,000 crore but was never implemented. NQM was approved on 19 April 2023 at ₹6,003.65 crore |
| 4. IIT Madras leads the Quantum Computing T-Hub under NQM | ❌ | IISc Bengaluru leads Quantum Computing T-Hub. IIT Madras leads Quantum Communication T-Hub |
| 5. Quantum entanglement allows information to travel faster than the speed of light | ❌ | Classic trap: entanglement is instantaneous in correlation, but no usable information is transmitted; does not violate relativistic speed limit |
| 6. Google's Willow chip (2024) achieved below-threshold quantum error correction for the first time | ✅ | Willow (105 qubits, Dec 2024) — first chip to reduce error rates as qubits scale; below-threshold error correction; 30-year challenge solved |
| 7. India is the 5th country to have a dedicated National Quantum Mission | ❌ | India is the 7th country — after US, Austria, Finland, France, Canada, China |
| 8. QKD (Quantum Key Distribution) uses the principle of quantum entanglement to ensure that any interception of data is detectable | ✅ | QKD uses quantum properties (entanglement in E91 protocol; polarisation of photons in BB84) — interception disturbs quantum state, alerting parties |
| 9. The Army Quantum Lab is situated at IISc Bengaluru | ❌ | Army Quantum Lab = Military College of Telecommunication Engineering, Mhow, Madhya Pradesh. IISc = NQM's Quantum Computing T-Hub only |
| 10. Post-Quantum Cryptography (PQC) requires quantum hardware to run | ❌ | PQC algorithms run on classical computers but are designed to resist attack by quantum computers. NIST finalised PQC standards in 2024 (ML-KEM, ML-DSA, SLH-DSA) |
UPSC may give "2020" or "₹8,000 crore" as options — both refer to the proposed but never implemented NM-QTA. The correct NQM: 19 April 2023 · ₹6,003.65 crore · 2023–2031. Remember: NM-QTA ≠ NQM.
Students frequently mix up T-Hub assignments. Fixed rule: IISc = Computing · IIT Madras = Communication · IIT Bombay = Sensing · IIT Delhi = Materials. Mnemonic: "IISc Computes, Madras Communicates, Bombay Senses, Delhi Makes Materials" — CCSM.
Three distinct terms: Quantum Supremacy = Google Sycamore 2019 (no real-world use); Quantum Advantage = preferred term; Verifiable Quantum Advantage = Google Quantum Echoes 2025 (real physical application, independently verifiable). UPSC 2025 tested the Willow milestone — both error correction AND benchmark completion are in the same chip (don't split them).
QKD = uses quantum physics to share keys (quantum hardware required); PQC = classical algorithms resistant to quantum attacks (runs on classical hardware). India uses both: QKD via QNu Labs, PQC via Vedic Kavach + NIST 2024 standards. Both are "quantum-safe" but different mechanisms — UPSC may ask which is which.
Entanglement does NOT allow faster-than-light communication. The correlation is instant, but no information (message) is transmitted. Einstein's locality principle is NOT violated — the EPR paradox was resolved by Bell's theorem experiments. Statement: "Quantum entanglement enables information to travel faster than light" = FALSE.
Format: (1) Statement-based MCQs — true/false of 2–3 facts about NQM, qubit properties, or a specific chip. (2) Pair matching — institution to quantum domain, or chip to company. (3) Single statement — "Which chip uses topological qubits?" (Majorana 1 = Microsoft). (4) Context MCQ — "Term 'qubit' is used in context of ___?" (Quantum Computing). Always read all 4 options before marking — UPSC uses distractor options with correct-sounding but reversed facts.
Quantum MCQs in UPSC are typically statement-based (identify how many are correct). Technique: (1) Fix anchor statements you know for sure as true/false; (2) eliminate options that contradict your anchor. Common tricks: wrong institution names, swapped mission years, confused topological vs superconducting qubits, wrong QKD/PQC mapping. Always verify qubit counts — 105 (Willow), 53 (Sycamore), 1,121 (IBM Condor), 64 (QpiAI India 2025).
| Chip / System | Company / Institution | Year | Qubits | Technology | Key Achievement |
|---|---|---|---|---|---|
| Sycamore | 2019 | 53 | Superconducting | First claimed quantum supremacy (200s vs 10,000 years) | |
| Condor | IBM | 2023 | 1,121 | Superconducting | First quantum processor to break 1,000-qubit barrier |
| Willow | Dec 2024 | 105 | Superconducting | Below-threshold error correction; RCS in 5 min vs 10²⁵ years | |
| Majorana 1 | Microsoft | 2025 | — | Topological | World's first topological qubit chip; Majorana fermions; UPSC 2025 tested |
| QpiAI Indus | QpiAI (India) | Apr 2025 | 25 | Superconducting | India's first full-stack QC system under NQM |
| QpiAI 64-qubit | QpiAI (India) | Nov 2025 | 64 | Superconducting | India's most powerful indigenous quantum computer (NQM product launch) |
| Quantum Diamond Microscope | IIT Bombay | 2025 | — | Quantum Sensing | Semiconductor trojan detection; neuronal imaging; magnetic field mapping |
| QNu Labs 1,000 km QKD | QNu Labs, India | 2025 | — | Quantum Comm. (QKD) | India's longest QKD network; ahead of NQM schedule |
| Micius Satellite | China (QUESS) | 2016 | — | Quantum Comm. | World's first QC satellite; entanglement over 1,200 km |
| IBM Quantum System Two | IBM / AQV India | 2026 | — | Superconducting | First IBM quantum computer to be installed in India (Quantum Valley, Amaravati) |
| Abbreviation | Full Form | Context |
|---|---|---|
| NQM | National Quantum Mission | India's flagship quantum initiative, 2023–2031 |
| QKD | Quantum Key Distribution | Quantum-secure communication protocol |
| PQC | Post-Quantum Cryptography | Classical algorithms resistant to quantum attacks |
| QC | Quantum Computing | Computing using qubits and quantum mechanics |
| QRNG | Quantum Random Number Generator | Uses quantum phenomena for true randomness |
| QuEST | Quantum Enabled Science & Technology | DST program launched 2018; 51 labs; ₹250 Cr |
| QuIC | Quantum Information and Computing Lab | IISc Bengaluru lab; photonic quantum science |
| QSim | Quantum Simulator Toolkit | NQM's cloud-based quantum algorithm simulator |
| ITES-Q | International Technology Engagement Strategy for Quantum | India's quantum diplomacy framework, 2025 |
| IYQ | International Year of Quantum Science and Technology | UN declared 2025 as IYQ |
| EPR | Einstein-Podolsky-Rosen (paradox) | 1935 paper describing entanglement as "spooky action" |
| RCS | Random Circuit Sampling | Benchmark used to demonstrate quantum supremacy |
| STRIDE | Synergy of Technology, Research, Industry and Defence Ecosystem | Framework under which India's QKD network deployed |
UPSC Prelims 2026 date is 24 May 2026. Quantum Technology has been a recurring S&T topic. Expect at least 1–2 questions, likely on: NQM T-Hub locations (statement-based), Majorana 1 / Willow (statement-based), or India's QKD milestone. Study the traps in Panel 8 — most errors come from institution mix-ups and mission year confusion.