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Relevance: GS-III (Science & Technology)| Source: Science & Tech Updates
The News: Scientists at Bengaluru’s Raman Research Institute (RRI) have found a simple, perfectly timed trick to keep quantum computers stable. This “single-shot” timing prevents quantum particles from suddenly dying out, offering a much cheaper and smarter alternative to older, heavy error-correction methods.
1. The Basics of Quantum Computing
Unlike your everyday laptop that uses binary 0s and 1s, quantum computers use the strange rules of physics to solve massive problems instantly.
- Superposition: A quantum bit (qubit) can be both a 0 and a 1 at the exact same time, giving the computer massive calculating speed.
- Entanglement: Two particles become invisibly connected. What happens to one instantly affects the other, even if they are miles apart.
- The Big Problem (Decoherence): Quantum states are highly fragile. If they are disturbed by heat or the outside environment, they lose their “magic” and the computer crashes. Sometimes, the invisible link breaks abruptly—a problem known as “sudden death.”
2. The RRI Bengaluru Breakthrough
Fixing quantum errors used to be a highly repetitive, tiring process for the computer, but Indian researchers have found a brilliant shortcut.
- The Old Repetitive Trap: Traditional methods used constant, repeated corrections to delay the computer from crashing. This was computationally expensive and often created new errors.
- The “Single-Shot” Fix: The RRI team proved that instead of constant fixes, a single, perfectly timed push can stop the quantum state from decaying.
- Timing as a Tool: By acting at the exact right millisecond, scientists can bypass “sudden death” entirely. This establishes time itself as a powerful new tool to build stable quantum processors in the future.
Practice MCQ
Q. Consider the following statements regarding Quantum Technology in India:
- Quantum decoherence refers to the phenomenon where qubits abruptly lose their quantum properties due to environmental disturbance.
- The Raman Research Institute (RRI) operates as a strategic defense wing under the Ministry of Defence.
Which of the statements given above is/are correct?
(a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2
Answer: (a) 1 only
Hint: Statement 1 is perfectly correct, describing the fragility of quantum states when exposed to the outside environment. Statement 2 is incorrect because the RRI is an autonomous research institute operating under the Department of Science and Technology (DST), not the Ministry of Defence.
Hint: Statement 1 is perfectly correct, describing the fragility of quantum states when exposed to the outside environment. Statement 2 is incorrect because the RRI is an autonomous research institute operating under the Department of Science and Technology (DST), not the Ministry of Defence.
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