The Digester

Qubits break temporal limit, hold information five times longer

Mar 20th 2026

By using a control qubit in superposition, researchers dramatically violated the temporal Tsirelson's bound and extended a target qubit's coherence and information storage by roughly five times, with potential benefits for quantum computing and sensing.

  • A team led by Arijit Chatterjee used a three-qubit carbon molecule to test the temporal Tsirelson's bound.
  • They put a control qubit into a quantum superposition that concurrently directed the target qubit to two different behaviors.
  • The experiment produced one of the largest known violations of the temporal Tsirelson's bound.
  • When the bound was broken, the target qubit resisted decoherence and encoded information for about five times longer.
  • Researchers say the method could improve qubit control for quantum computing and enhance quantum metrology techniques.

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