20250190839. Asymmetric Repetition Code C (ALICE & BOB)
ASYMMETRIC REPETITION CODE FOR A CAT- QUBIT
Abstract: the disclosure relates to a repetition code for a cat qubit comprising a number d of data cat-qubits and at least ancillary cat-qubits, wherein the number d is greater than or equal to 3, each ancillary cat-qubit is connected to two data cat-qubits by two respective cnot gates such that no data cat-qubit is connected to more than two ancillary cat-qubits, and the two-photon dissipation rate of the ancillary cat-qubits is greater than the two-photon dissipation factor of the data cat-qubits. said repetition code is implemented by carrying out, for each ancillary cat-qubit, error correction cycles comprising at least the following steps: preparing the ancillary cat-qubit in a state suitable for the operator x: “i+>” or “i−>”; activating one of the two cnot gates connected to said ancillary cat-qubit (); activating the other cnot gate connected to this ancillary cat-qubit; and measuring the photon-number parity of said ancillary cat-qubit.
Inventor(s): Camille BERDOU, François-Marie LE REGENT, Jérémie GUILLAUD, Zaki LEGHTAS, Mazyar MIRRAHIMI
CPC Classification: G06N10/70 (Quantum error correction, detection or prevention, e.g. surface codes or magic state distillation)
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