Asymmetric repitition code for a cat-qubit

Asymmetric repitition code for a cat-qubit

The invention relates to a repetition code for a cat qubit comprising a number d of data cat-qubits (4) and at least (d-1) ancillary cat-qubits (6), the number d being greater than or equal to 3, each ancillary cat-qubit (6) being connected to two data cat-qubits (4) by two respective CNOT gates (8)...

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Hauptverfasser: LE REGENT Fran?ois-Marie, BERDOU Camille, GUILLAUD J?r?mie, LEGHTAS Zaki, MIRRAHIMI Mazyar
Format: Patent
Sprache:eng ; heb
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CALCULATING
COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS
COMPUTING
COUNTING
PHYSICS
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creator LE REGENT Fran?ois-Marie
BERDOU Camille
GUILLAUD J?r?mie
LEGHTAS Zaki
MIRRAHIMI Mazyar
description The invention relates to a repetition code for a cat qubit comprising a number d of data cat-qubits (4) and at least (d-1) ancillary cat-qubits (6), the number d being greater than or equal to 3, each ancillary cat-qubit (6) being connected to two data cat-qubits (4) by two respective CNOT gates (8) in such a way that no data cat-qubit (4) is connected to more than two ancillary cat-qubits (6), the two-photon dissipation rate of the ancillary cat-qubits being strictly 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 (6), error correction cycles comprising at least the following steps: a) preparing the ancillary cat-qubit (6) so as to be in a state suitable for the operator X: "|+>" or "|->"; b) activating one of the two CNOT gates (8) connected to said ancillary cat-qubit (6); c) activating the other CNOT gate (8) connected to this ancillary cat-qubit (6); and d) measuring the photon-number parity of said ancillary cat-qubit (6).
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subjects CALCULATING
COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS
COMPUTING
COUNTING
PHYSICS
title Asymmetric repitition code for a cat-qubit
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