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India demonstrates its first 5.56 km free-space quantum distribution link
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Quantum keys through open air, not fibre: India's first 5.56 km link and the GS3 concept behind it
A 5.56 km free-space quantum link is shown for the first time in India.
Why it matters: general awareness
What you need to know
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India has demonstrated its first 5.56 km free-space quantum distribution link.
Quantum links of this kind carry quantum-secured keys through open air instead of fibre, with applications in secure communication.
સ્રોત: Topper IAS editorial (PIB / The Hindu / Indian Express)
મુખ્ય તથ્યો
Remember these
- India has demonstrated its first 5.56 km free-space quantum distribution link.
- Free-space links carry quantum-secured keys through open air instead of optical fibre.
- Quantum key distribution (QKD) relies on quantum mechanics, so any eavesdropping disturbs the signal and can be detected.
- Main application area: secure communication.
- Syllabus relevance: GS3 Science & Technology, quantum technology.
પ્રિલિમ્સ · મેઇન્સ
How the exam will ask it
પ્રિલિમ્સ
- Quantum key distribution is used to share encryption keys securely; the security rests on the laws of quantum physics rather than on computational difficulty.
- A free-space quantum link transmits quantum signals through the atmosphere, unlike a fibre-based link that uses optical cables.
- Free-space links are a stepping stone towards satellite-based quantum communication, since satellites cannot use fibre.
મેઇન્સ
GS3 (Science & Technology): Quantum communication is emerging as a strategic technology for secure networks in defence, finance and governance. The demonstrated 5.56 km free-space link shows India's progress beyond fibre-based setups; the way forward lies in longer ranges, satellite links, indigenous components, and standards backed by sustained research funding and the National Quantum Mission.
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