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 | |
| Publication status | Published - 15 Feb 2021 |
Keywords
- quantum communication
- quantum optics
- quantum repeaters