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Paper detail

Parity-Swap State Comparison Amplifier for Schrödinger Cat States

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.

preprint2021arXivOpen access
Gioan TatsiLuca MazzarellaJohn Jeffers
quant-ph
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Gioan TatsiLuca MazzarellaJohn Jeffers

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