arXiv 2102.135302021-02-26quant-ph

Parity-Swap State Comparison Amplifier for Schrödinger Cat States

Gioan Tatsi, Luca Mazzarella, John Jeffers

DOI：: 10.1103/PhysRevA.103.023709

英文摘要：

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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