Quantum computers could surpass conventional computing in essential tasks, but they are prone to errors that ultimately lead to the loss of quantum information, limiting today’s quantum devices. Therefore, to achieve large-scale quantum information processors, scientists need to develop and implement strategies for correcting quantum errors.
Researchers at the Paris-based quantum computing firm Alice & Bob, together with colleagues at France’s ENS–PSL and ENS de Lyon, have now made significant strides towards a solution by enhancing the stability and control of so-called cat qubits. Named after Erwin Schrödinger’s famous thought experiment, these quantum bits use coherent states of a quantum resonator as their logical states. Cat qubits are promising for quantum error correction because they are constructed from coherent states, which make them intrinsically robust against certain types of errors from the environment.
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