Synthetic spins in microwave cavities

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Quantum computing promises to revolutionize many areas such as quantum chemistry, machine learning and cryptography. However, useful quantum computations are still out of reach because current quantum bits (qubits) are noisy, thus limiting how long quantum information can be preserved. Quantum error-correction codes can solve this problem by redundantly encoding a logical qubit into a larger state space. This allows errors to be detected and corrected before the quantum information is corrupted. A promising strategy towards quantum error correction is to encode logical qubits into microwave cavities, which can exhibit longer lifetimes than other types of qubits. In this collaborative project, we want to investigate both theoretically and experimentally a new class of quantum error-correcting codes that can be implemented in microwave cavities. These new codes promise to have high error-correcting capabilities, and allow the easy implementation of several logical operations. This project will advance the state of the art for quantum computing, and is therefore relevant for Canadian start-ups working towards building a quantum computer.