Context
Scientists at the Raman Research Institute’s Quantum Information and Computing Laboratory, Bengaluru, have demonstrated that a single, well-timed operation can delay or prevent entanglement collapse in their studied system. The approach could improve the reliability of quantum computing.
Explanation
- Classical computers use bits, representing 0 or 1; quantum computers use qubits.
- Superposition allows a qubit to exist in a combination of 0 and 1 states.
- Quantum entanglement is a fundamental property of the quantum world in which two particles share a single correlated state, so measuring one reveals information about the other even when they are far apart.
- Analogy: Like a pair of perfectly linked gloves kept in separate boxes—opening one box and finding a left glove immediately tells you the other box contains the right glove.
- Interactions with the environment cause decoherence, damaging quantum information and potentially destroying entanglement.
- The new method uses a single operation at a carefully chosen time to protect entanglement under studied conditions.
- It could complement quantum error correction, which detects and corrects errors, helping make quantum calculations more reliable.
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