[2024-10-25 Jorge Marques]

Controlling quantum states with the fidelity required for useful quantum algorithms exceeds the capabilities of single physical qubits. Quantum error correction addresses this challenge by redundantly encoding a logical qubit across multiple physical qubits. In this talk, I will present the realization of an error-detected logical qubit in the surface code, along with the obstacles and solutions involved in scaling this approach to a larger, error-corrected logical qubit.

[1] J. Marques, et al., Logical-qubit operations in an error-detecting surface code. Nat. Phys. (2022).

[2] J. Marques, et al., All-microwave leakage reduction units for quantum error correction with superconducting transmon qubits. Phys. Rev. Lett. (2023).

[3] H. Ali, et al., Reducing the error rate of a superconducting logical qubit using analog readout information. Phys. Rev. Applied (2024).