In News:

India has achieved a significant milestone under the National Quantum Mission (NQM) by developing a 1,000 km quantum communication network. Developed using indigenous technology by QNu Labs with support from the Department of Science and Technology (DST), this achievement comes less than two years after the mission’s launch, putting India well ahead of its interim targets.

The National Quantum Mission (NQM): Overview

• Launch: Approved in April 2023; officially launched in October 2024.
• Nodal Agency: Department of Science and Technology (DST).
• Budget: ?6,003 crore for a period of eight years (2023-24 to 2030-31).
• Objective: To seed, nurture, and scale up R&D in quantum technologies, positioning India among the top six nations globally (joining the US, China, Canada, Austria, Finland, and France).

Key Pillars of NQM & Targets

The mission is structured around four primary domains:

• Quantum Computing: Developing computers with 50 to 1,000 physical qubits using superconducting and photonic platforms.
• Quantum Communication:
  • Terrestrial: Inter-city QKD networks over 2,000 km using existing optical fibers.
  • Satellite: Secure satellite-based communication between ground stations over 2,000 km (including international links).
• Quantum Sensing & Metrology: High-sensitivity magnetometers and atomic clocks for precision navigation (GPS/Aviation) and defense.
• Quantum Materials: Synthesis of superconductors, topological materials, and semiconductors for device fabrication.

Technical Spotlight: Quantum Key Distribution (QKD)

The 1,000-km network relies on QKD, which is the "gold standard" for secure communication.

• How it works: It uses quantum particles (photons) to share secret encryption keys.
• The "Observer Effect": Based on the laws of quantum mechanics (No-cloning theorem), any attempt to intercept or eavesdrop on the key disturbs the quantum state of the photons.
• Instant Detection: This disturbance alerts the communicating parties immediately, making the communication virtually unhackable.

Significance of the 1,000-km Milestone

• Global Standing: This is one of the longest terrestrial QKD deployments globally, demonstrating India’s rapid execution capabilities.
• Strategic Security: Essential for protecting sensitive data in Defense, Finance, and Critical National Infrastructure (Power grids, nuclear plants).
• Terrain Versatility: The indigenous technology is designed to function across diverse and challenging terrains, including underwater and underground environments.
• Aatmanirbharta (Self-Reliance): Reduces dependence on foreign encryption patents and imported hardware, fostering a home-grown deep-tech ecosystem.

Institutional & Startup Ecosystem

• Thematic Hubs (T-Hubs): Four dedicated hubs have been established in top academic and R&D institutes to drive the mission’s goals.
• Support for Deep-Tech: The mission currently supports 17 ventures.
• Innovative Financing: The government is employing Optionally Convertible Debt (OCD). This allows startups to access capital without immediate equity dilution, encouraging private sector participation in high-risk, high-reward quantum research.