Which qubit retains its state the longest?

Understand the Problem

The question is asking about the qubit that retains its state the longest. This is related to the coherence time of the qubit, which refers to how long a qubit can maintain its superposition before decoherence occurs. The longer the coherence time, the better the qubit retains its quantum information. To answer this question, one would need to know the specific properties of each qubit (q0, q1, q2, q3, q4) in the context of a particular quantum computing system or experiment where their coherence times have been characterized.

Answer

The 'fluxonium' qubit currently retains its state the longest among superconducting qubits.

Based on current research, the 'fluxonium' qubit has demonstrated the longest coherence time among superconducting qubits. In 2023, researchers showcased a fluxonium qubit retaining its quantum information for 1.43 milliseconds, which is 10 times longer than previous results.

Answer for screen readers

Based on current research, the 'fluxonium' qubit has demonstrated the longest coherence time among superconducting qubits. In 2023, researchers showcased a fluxonium qubit retaining its quantum information for 1.43 milliseconds, which is 10 times longer than previous results.

More Information

The duration a qubit can maintain its state is called its coherence time, which is critical for performing complex quantum computations and implementing error correction techniques. The longer the coherence time, the more complex and reliable the computations that can be performed.

Tips

Qubit technology is constantly evolving, so the qubit with the longest coherence time could change over time as new research and developments emerge.

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