Which mechanism limits electron coherence time in a superconducting quantum bit (qubit)?

💡 Explanation

When a superconducting qubit interacts with its environment, energy relaxation occurs via phonon emission, because phonons are quantized lattice vibrations that can carry away energy efficiently, decohering the qubit. Therefore, phonon interactions are a limiting factor, rather than accumulation, trapping or capacitance which would require alternative qubit parameters involved causing decoherence.

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