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 languageEnglish
Article number023709
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume103
Issue number2
DOIs
Publication statusPublished - 15 Feb 2021

Keywords

  • quantum communication
  • quantum optics
  • quantum repeaters

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