Parity-swap state comparison amplifier for Schrödinger cat states

Tatsi, Gioan and Mazzarella, Luca and Jeffers, John (2021) Parity-swap state comparison amplifier for Schrödinger cat states. Physical Review A - Atomic, Molecular, and Optical Physics, 103 (2). 023709. ISSN 1094-1622

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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.

    ORCID iDs

    Tatsi, Gioan, Mazzarella, Luca and Jeffers, John ORCID logoORCID: https://orcid.org/0000-0002-8573-1675;