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Quantum computers could have a fundamental limit after all - Phys.org

Google News – Quantum Computing
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⚡ Quantum Brief
A March 2026 study suggests quantum computers may face inherent physical limits, challenging assumptions about their unbounded scalability due to fundamental noise and decoherence constraints. Researchers propose that quantum error correction—a core technique for stabilizing qubits—could hit a theoretical ceiling, preventing perfect fault tolerance even with advanced algorithms. The findings imply current quantum architectures may struggle to surpass classical supercomputers for certain problems, reshaping expectations for near-term practical applications like cryptography or material science. Experts warn the limits stem from quantum mechanics itself, not just engineering hurdles, as interactions between qubits and their environment introduce irreversible errors at scale. The discovery could redirect funding toward hybrid quantum-classical systems or alternative approaches like topological qubits, which may better mitigate these fundamental constraints.
Quantum computers could have a fundamental limit after all - Phys.org

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Source: Google News – Quantum Computing