Parity-swap state comparison amplifier for Schrödinger cat states

Gioan Tatsi; Luca Mazzarella; John Jeffers

doi:10.1103/PhysRevA.103.023709

Parity-swap state comparison amplifier for Schrödinger cat states

Gioan Tatsi, Luca Mazzarella, John Jeffers

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Abstract

We propose a postselecting parity-swap amplifier for Schrödinger cat states that does not require the amplified state to be known a priori. The device is based on a previously implemented state comparison amplifier for coherent states. It consumes only Gaussian resource states, which provides an advantage over some cat state amplifiers. It requires simple Geiger-mode photodetectors and works with high fidelity and approximately twofold gain.

Original language	English
Article number	023709
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	103
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.103.023709
Publication status	Published - 15 Feb 2021

Keywords

quantum communication
quantum optics
quantum repeaters

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10.1103/PhysRevA.103.023709

Tatsi-Mazzarella-Jeffers-PRA-2021-Parity-swap-state-comparison-amplifier-for-SchrodingerAccepted author manuscript, 1.45 MB

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abstract = "We propose a postselecting parity-swap amplifier for Schr{\"o}dinger cat states that does not require the amplified state to be known a priori. The device is based on a previously implemented state comparison amplifier for coherent states. It consumes only Gaussian resource states, which provides an advantage over some cat state amplifiers. It requires simple Geiger-mode photodetectors and works with high fidelity and approximately twofold gain.",

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AB - We propose a postselecting parity-swap amplifier for Schrödinger cat states that does not require the amplified state to be known a priori. The device is based on a previously implemented state comparison amplifier for coherent states. It consumes only Gaussian resource states, which provides an advantage over some cat state amplifiers. It requires simple Geiger-mode photodetectors and works with high fidelity and approximately twofold gain.

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KW - quantum optics

KW - quantum repeaters

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Parity-swap state comparison amplifier for Schrödinger cat states

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