All-optical cat-code quantum error correction

• URL: http://arxiv.org/abs/2108.12225v1
• Date: Fri, 27 Aug 2021 11:34:33 GMT
• Title: All-optical cat-code quantum error correction
• Authors: Jacob Hastrup and Ulrik Lund Andersen
• Abstract summary: We introduce a teleportation-based error-correction scheme for the cat code. The scheme detects and corrects single-photon losses while restoring the amplitude of the cat states.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The cat code is a promising encoding scheme for bosonic quantum error correction as it allows for correction against losses--the dominant error mechanism in most bosonic systems. However, for losses to be detected efficiently without disturbing the encoded logical information, one needs to implement a parity measurement of the excitation number. While such a measurement has been demonstrated in the microwave regime using a superconducting transmon ancilla, it has remained unclear how it can be implemented in the optical regime. Here, we introduce a teleportation-based error-correction scheme for the cat code, using elements suitable for an optical setting. The scheme detects and corrects single-photon losses while restoring the amplitude of the cat states, thereby greatly suppressing the accumulation of errors in lossy channels.

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